diff --git a/LICENSE b/LICENSE
index 14de9f3..be3f7b2 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,21 +1,661 @@
-MIT License
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
 
-Copyright (c) 2024 ReadMeABook
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+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.
diff --git a/README.md b/README.md
index b1c92f8..8748b93 100644
--- a/README.md
+++ b/README.md
@@ -1,43 +1,55 @@
-# ReadMeABook
+<div align="center">
 
-**[HERO SCREENSHOT PLACEHOLDER: Full-width hero image showing the main dashboard with recent requests, BookDate swipe interface preview, and library stats - something that looks modern and shows off the UI]**
+![RMAB_hero.png](screenshots/RMAB_hero.png)
 
-An audiobook automation system that connects your Plex library to torrent and Usenet indexers. Request audiobooks through a web interface and they're automatically downloaded, organized, and imported into your Plex library.
+### Audiobook automation for Plex and Audiobookshelf
 
-## What It Does
+<div align="center">
 
-If you're running Plex with an audiobook library, you know the drill: search for torrents or NZBs manually, download them, move files to the right folder, wait for Plex to scan. ReadMeABook automates all of that.
+  [![Ko-Fi](https://img.shields.io/badge/Ko--fi-F16061?style=for-the-badge&logo=ko-fi&logoColor=white)](https://ko-fi.com/kikootwo)
+  [![GitHub Sponsors](https://img.shields.io/github/sponsors/kikootwo?style=for-the-badge&logo=github&logoColor=white&label=Sponsor&color=EA4AAA)](https://github.com/sponsors/kikootwo)
+  [![Build Status](https://img.shields.io/github/actions/workflow/status/kikootwo/readmeabook/build-unified-image.yml?branch=main&style=for-the-badge&logo=github&label=Build)](https://github.com/kikootwo/readmeabook/actions/workflows/build-unified-image.yml)
+  [![Tests](https://img.shields.io/github/actions/workflow/status/kikootwo/readmeabook/run-tests.yml?branch=main&style=for-the-badge&logo=github&label=Tests)](https://github.com/kikootwo/readmeabook/actions/workflows/run-tests.yml)
+  [![Docker Pulls](https://img.shields.io/docker/pulls/kikootwo/readmeabook?style=for-the-badge&logo=docker&logoColor=white)](https://github.com/kikootwo/readmeabook/pkgs/container/readmeabook)
+  [![License](https://img.shields.io/badge/License-AGPL%20v3-blue.svg?style=for-the-badge)](https://www.gnu.org/licenses/agpl-3.0)
+  [![GitHub Stars](https://img.shields.io/github/stars/kikootwo/readmeabook?style=for-the-badge&logo=github)](https://github.com/kikootwo/readmeabook/stargazers)
+  [![Discord](https://img.shields.io/discord/1450562177277755464?style=for-the-badge&logo=discord&logoColor=white&label=Discord)](https://discord.gg/kaw6jKbKts)
 
-It works like the *arr apps (Sonarr, Radarr) but for audiobooks. Connect it to Prowlarr for searching, qBittorrent or SABnzbd for downloading, and Plex for your library. Request a book and everything else happens automatically.
+</div>
 
-There's also BookDate - an AI-powered recommendation system that suggests audiobooks based on what you already own. Think Tinder but for books. Swipe right to request, left to skip.
+*Radarr/Sonarr + Overseerr for audiobooks, all in one*
+
+[Features](#features) • [Setup](#setup) • [Screenshots](#screenshots) • [Discord](#community)
+
+</div>
+
+---
+
+## What is this?
+
+You run Plex or Audiobookshelf with audiobooks. You want more audiobooks. You search indexers, download torrents or NZBs, organize files, wait for your server to scan. ReadMeABook does all of that automatically.
+
+Request a book → Prowlarr searches → qBittorrent or SABnzbd downloads → Files organized → Library imports. Done.
+
+Also includes BookDate: AI recommendations with a Tinder-style swipe interface. Swipe right to request.
+
+User friendly audible-backed searches, multi-file chapter merging, e-book sidecar support, OIDC OAuth, admin approval workflows, and more.
 
 ## Features
 
-- **Plex Integration** - OAuth login, automatic library scanning, fuzzy matching
-- **Torrent Support** - qBittorrent and Transmission clients
-- **Usenet Support** - SABnzbd for NZB downloads
-- **Prowlarr Integration** - Search both torrents and Usenet indexers
-- **Request Management** - Track downloads from search to completion
-- **BookDate Recommendations** - AI-powered suggestions with swipe interface (OpenAI/Claude)
-- **Chapter Merging** - Automatically combine multi-file downloads into single M4B with chapter markers
-- **E-book Sidecar** - Optional e-book downloads from Anna's Archive
-- **Multi-User Support** - Role-based access (admin/user), request approval system
-- **Setup Wizard** - 9-step guided configuration with connection testing
+- **Plex** or **Audiobookshelf**
+- **Torrents** via qBittorrent
+- **Usenet** via SABnzbd
+- **Prowlarr** for indexer search (torrents + NZBs)
+- **BookDate**: AI recommendations (OpenAI/Claude/Local) with swipe interface
+- **Chapter merging**: Multi-file downloads → single M4B with chapters
+- **E-book sidecar**: Optional EPUB/PDF downloads from Shadow Library
+- **Request approval**: Admin approval workflow for multi-user setups
+- **Setup wizard**: Step-by-step guided config with connection testing
 
-## Screenshots
+## Setup
 
-**[SCREENSHOT PLACEHOLDER: Dashboard page showing active requests with status badges (Searching/Downloading/Completed) and recent activity]**
-
-**[SCREENSHOT PLACEHOLDER: BookDate interface with the card stack showing a book cover, AI reasoning, and the swipe gesture indicators]**
-
-**[SCREENSHOT PLACEHOLDER: Settings page showing the Prowlarr/qBittorrent/SABnzbd configuration form with connection test buttons]**
-
-## Quick Start
-
-Prerequisites: Docker, Plex Media Server, and either qBittorrent or SABnzbd. Prowlarr is highly recommended for searching indexers.
-
-### Docker Compose
+**Prerequisites:** Docker, Plex or Audiobookshelf, qBittorrent or SABnzbd, Prowlarr
 
 ```yaml
 services:
@@ -50,110 +62,44 @@ services:
     volumes:
       - ./config:/app/config
       - ./cache:/app/cache
-      - ./downloads:/downloads
-      - ./media:/media
+      - ./downloads:/downloads        # Your download client's path
+      - ./media:/media                # Your audiobook library
       - ./pgdata:/var/lib/postgresql/data
       - ./redis:/var/lib/redis
     environment:
-      # Optional - set to your user/group ID for proper file permissions
-      PUID: 1000
-      PGID: 1000
-
-      # Required if accessing from outside localhost (for Plex OAuth)
-      PUBLIC_URL: "https://audiobooks.example.com"
+      PUID: 1000                      # Optional: your user ID
+      PGID: 1000                      # Optional: your group ID
+      PUBLIC_URL: "https://audiobooks.example.com"  # Required for OAuth
 ```
 
-Update the volume paths to match your setup:
-- `/downloads` should point to your download client's directory
-- `/media` should point to your Plex audiobook library
-
-Start it:
 ```bash
 docker compose up -d
 ```
 
-Navigate to http://localhost:3030 and run through the setup wizard.
+Open http://localhost:3030 and follow the setup wizard.
 
-### Initial Configuration
+## Screenshots
 
-The setup wizard walks you through:
-1. Admin account creation
-2. Plex server connection and library selection
-3. Prowlarr configuration (API key and indexer selection)
-4. Download client setup (qBittorrent or SABnzbd)
-5. Path configuration with validation
-6. Optional BookDate AI recommendations
-7. Review and finalization
+<img WIDTH="720" alt="image" src="screenshots/HOMEPAGE.png" />
+<img WIDTH="720" alt="image" src="screenshots/ADMIN.png" />
+<img WIDTH="720" alt="image" src="screenshots/BOOKDATE.png" />
 
-After setup, the first library scan runs automatically. You can start requesting audiobooks immediately.
+## Community
 
-## How It Works
+Join the Discord: https://discord.gg/kaw6jKbKts
 
-**Request Flow:**
-1. Search for an audiobook (pulls metadata from Audible)
-2. Submit a request
-3. Prowlarr searches your configured indexers (torrents and/or NZBs)
-4. Best result is selected based on seeders, file size, and quality
-5. Download starts in qBittorrent or SABnzbd
-6. Files are monitored until completion
-7. Multi-file audiobooks are optionally merged into M4B with chapter markers
-8. Files are organized into your Plex library using configurable folder templates
-9. Plex scans and matches the audiobook
-10. Request marked as complete
-
-**BookDate Flow:**
-1. Configure AI provider in settings (OpenAI or Claude)
-2. Set your library scope (full library, rated books only, or pick favorites)
-3. AI analyzes your library and suggests recommendations
-4. Swipe right to request, left to skip, up to dismiss
-5. Requests are processed like normal requests
-
-The system runs background jobs for library scanning, Audible metadata refresh, and request status checks. Everything is logged and visible in the admin dashboard.
-
-## Architecture
-
-Built with Next.js, PostgreSQL, and Redis. The container includes all three services in a single unified image. Background jobs are handled by Bull queues with Redis.
-
-Authentication uses Plex OAuth, so users log in with their existing Plex accounts. The first user automatically becomes an admin. Admins can enable a request approval system if needed.
-
-## Configuration
-
-All configuration happens in the web UI. The only environment variables you might need are:
-- `PUBLIC_URL` - Required for OAuth redirects if not using localhost
-- `PUID`/`PGID` - Optional, for file permission mapping
-- `LOG_LEVEL` - Optional, defaults to `info`
-
-Secrets (JWT keys, database password, encryption keys) are auto-generated on first run and persisted to `/app/config/.secrets`.
-
-## Advanced Features
-
-**Chapter Merging:** When enabled, multi-file audiobook downloads (separate MP3/M4A files per chapter) are automatically merged into a single M4B file with proper chapter markers. Works for both M4A (fast, codec copy) and MP3 (re-encoded to AAC).
-
-**E-book Sidecar:** Optionally downloads e-books from Anna's Archive to accompany audiobooks. Files are placed in the same folder as the audiobook. Supports EPUB, PDF, MOBI, and AZW3 formats.
-
-**Request Approval:** Admins can enable a request approval system where user requests must be approved before processing. Useful for managing indexer limits or controlling library growth.
-
-**Remote Path Mapping:** If your download client runs on a different machine or container, path mapping ensures ReadMeABook can find completed downloads.
-
-## Contributing
-
-Found a bug? Want to add a feature? Pull requests are welcome. The codebase is documented in the `documentation/` directory.
-
-If you want to discuss ideas or get help, join the Discord: **[DISCORD LINK PLACEHOLDER]**
+Feature and fix Contributions are highly welcome. Documentation in `documentation/` if you want to contribute. Discord is a great place to ask questions!
 
 ## Support
 
-If this project is useful to you, the best way to support it is:
-- Star the repo
-- Share it with others who might find it useful
-- Contribute code, documentation, or bug reports
+If you find this project useful, consider supporting development via [GitHub Sponsors]()
 
-Financial contributions are not expected or necessary. This project exists because I wanted it for myself, and sharing it costs nothing extra.
-
-## License
-
-MIT - See LICENSE file
+If you'd like to support but cannot sponsor, a simple star on the GitHub repo is also greatly appreciated!
 
 ---
 
-Built for people who want their audiobook library to just work.
+<div align="center">
+
+**AGPL v3 License**
+
+</div>
diff --git a/documentation/TABLEOFCONTENTS.md b/documentation/TABLEOFCONTENTS.md
index 0892793..05d01fd 100644
--- a/documentation/TABLEOFCONTENTS.md
+++ b/documentation/TABLEOFCONTENTS.md
@@ -62,6 +62,11 @@
 - **LOG_LEVEL configuration** → [backend/services/logging.md](backend/services/logging.md)
 - **Job-aware database persistence** → [backend/services/logging.md](backend/services/logging.md)
 
+## Notifications
+- **Notification backends (Discord, Pushover)** → [backend/services/notifications.md](backend/services/notifications.md)
+- **Event types, triggers, message formatting** → [backend/services/notifications.md](backend/services/notifications.md)
+- **Notification settings UI** → [settings-pages.md](settings-pages.md)
+
 ## Frontend Components
 - **Component catalog (cards, badges, forms)** → [frontend/components.md](frontend/components.md)
 - **RequestCard, StatusBadge, ProgressBar** → [frontend/components.md](frontend/components.md)
diff --git a/documentation/admin-features/request-approval.md b/documentation/admin-features/request-approval.md
index 5ca5c90..8104090 100644
--- a/documentation/admin-features/request-approval.md
+++ b/documentation/admin-features/request-approval.md
@@ -3,7 +3,7 @@
 **Status:** ✅ Implemented | Admin approval workflow for user requests with global & per-user auto-approve controls
 
 ## Overview
-Allows admins to review and approve/deny user requests before they are processed. Supports global auto-approve toggle and per-user auto-approve overrides.
+Allows admins to review and approve/deny user requests before they are processed. Supports global auto-approve toggle and per-user auto-approve overrides. Interactive search requests store pre-selected torrents when approval is required.
 
 ## Key Details
 
@@ -21,20 +21,107 @@ Allows admins to review and approve/deny user requests before they are processed
   - `false` = Always require approval for this user
 
 ### Approval Logic
-**When user creates request:**
+
+**When user creates request (automatic search via POST /api/requests):**
 1. Check `User.autoApproveRequests`:
-   - If `true` → Set status to 'pending', trigger search job
-   - If `false` → Set status to 'awaiting_approval', wait for admin
+   - If `true` → Set status to 'pending', trigger search job, send approved notification
+   - If `false` → Set status to 'awaiting_approval', wait for admin, send pending notification
    - If `null` → Check global `auto_approve_requests` setting
-     - If 'true' → Auto-approve (status: 'pending')
-     - Otherwise → Require approval (status: 'awaiting_approval')
+     - If 'true' → Auto-approve (status: 'pending', send approved notification)
+     - Otherwise → Require approval (status: 'awaiting_approval', send pending notification)
+
+**When user creates request with pre-selected torrent (interactive search):**
+- **Via POST /api/audiobooks/request-with-torrent** (book detail page):
+  1. Check approval requirements (same logic as above)
+  2. If approval needed → Set status to 'awaiting_approval', store torrent in `selectedTorrent`, send pending notification
+  3. If auto-approved → Set status to 'downloading', start download immediately, send approved notification
+
+- **Via POST /api/requests/{id}/select-torrent** (existing request):
+  1. Check if request already in 'awaiting_approval' status → Block with 403 error
+  2. Check approval requirements based on CURRENT settings
+  3. If approval needed → Set status to 'awaiting_approval', store torrent in `selectedTorrent`, send pending notification
+  4. If auto-approved → Set status to 'downloading', start download immediately, send approved notification
 
 **Admin approval actions:**
-- **Approve** → Change status to 'pending', trigger search job
-- **Deny** → Change status to 'denied', no further processing
+- **Approve:**
+  - If request has `selectedTorrent` → Download that specific torrent (clear `selectedTorrent` field)
+  - If no `selectedTorrent` → Trigger automatic search job (status: 'pending')
+  - Send approved notification
+- **Deny:** → Change status to 'denied', no further processing
 
 ## API Endpoints
 
+### POST /api/audiobooks/request-with-torrent
+Create request with pre-selected torrent (book detail page interactive search)
+
+**Auth:** User or Admin
+
+**Request:**
+```json
+{
+  "audiobook": { /* audiobook metadata */ },
+  "torrent": { /* selected torrent data */ }
+}
+```
+
+**Approval Check:**
+- Checks approval requirements
+- If needed → Status 'awaiting_approval', stores torrent, sends pending notification
+- If auto-approved → Status 'downloading', starts download, sends approved notification
+
+**Response (awaiting approval):**
+```json
+{
+  "success": true,
+  "request": { /* request with status: 'awaiting_approval' */ },
+  "message": "Request submitted for admin approval"
+}
+```
+
+**Response (auto-approved):**
+```json
+{
+  "success": true,
+  "request": { /* request with status: 'downloading' */ }
+}
+```
+
+### POST /api/requests/[id]/select-torrent
+Select torrent for existing request (request page interactive search)
+
+**Auth:** User (owner) or Admin
+
+**Request:**
+```json
+{
+  "torrent": { /* selected torrent data */ }
+}
+```
+
+**Approval Check:**
+- Blocks if already in 'awaiting_approval' status
+- Re-checks approval requirements based on CURRENT settings
+- If needed → Status 'awaiting_approval', stores torrent, sends pending notification
+- If auto-approved → Status 'downloading', starts download, sends approved notification
+
+**Response (awaiting approval):**
+```json
+{
+  "success": true,
+  "request": { /* request with status: 'awaiting_approval' */ },
+  "message": "Request submitted for admin approval"
+}
+```
+
+**Response (auto-approved):**
+```json
+{
+  "success": true,
+  "request": { /* request with status: 'downloading' */ },
+  "message": "Torrent download initiated"
+}
+```
+
 ### GET /api/admin/requests/pending-approval
 Fetch all requests with status 'awaiting_approval'
 
@@ -76,12 +163,31 @@ Approve or deny a specific request
 }
 ```
 
-**Response (approve):**
+**Approval Logic:**
+- If request has `selectedTorrent`:
+  - Downloads that specific torrent directly (status: 'downloading')
+  - Clears `selectedTorrent` field after use
+  - Message: "Request approved and download started with pre-selected torrent"
+- If no `selectedTorrent`:
+  - Triggers automatic search job (status: 'pending')
+  - Message: "Request approved and search job triggered"
+- Both send approved notification
+
+**Response (approve with pre-selected torrent):**
+```json
+{
+  "success": true,
+  "message": "Request approved and download started with pre-selected torrent",
+  "request": { /* full request object with status: 'downloading' */ }
+}
+```
+
+**Response (approve without pre-selected torrent):**
 ```json
 {
   "success": true,
   "message": "Request approved and search job triggered",
-  "request": { /* full request object */ }
+  "request": { /* full request object with status: 'pending' */ }
 }
 ```
 
@@ -90,7 +196,7 @@ Approve or deny a specific request
 {
   "success": true,
   "message": "Request denied",
-  "request": { /* full request object */ }
+  "request": { /* full request object with status: 'denied' */ }
 }
 ```
 
@@ -188,10 +294,28 @@ Update user (includes autoApproveRequests field)
 - **denied** → Red badge with X icon
 - All other statuses → Existing badge colors
 
+## Security
+
+**Interactive Search Approval Enforcement:**
+- All interactive search flows (request-with-torrent, select-torrent) check approval requirements
+- If approval needed, torrent is stored in `selectedTorrent` field and request enters 'awaiting_approval' status
+- Admin sees exact torrent user selected when reviewing approval
+- Upon approval, admin approves THAT specific torrent (no re-search)
+
+**Settings Change Protection:**
+- `select-torrent` endpoint re-checks approval requirements based on CURRENT settings
+- Prevents bypass: User with auto-approve enabled creates request → Admin disables auto-approve → User tries to download
+- If settings changed, torrent is stored and request enters approval queue
+
+**Notification Timing:**
+- Automatic search: Notification sent immediately on request creation
+- Interactive search (auto-approved): Notification sent when torrent selected and download starts
+- Interactive search (approval needed): Pending notification sent immediately, approved notification sent on admin approval
+
 ## Database Schema
 
 ### User Table
-```
+```prisma
 autoApproveRequests: Boolean (nullable, default null)
 - null: Use global setting
 - true: Always auto-approve
@@ -199,17 +323,35 @@ autoApproveRequests: Boolean (nullable, default null)
 ```
 
 ### Request Table
-```
+```prisma
 status: Enum (includes 'awaiting_approval', 'denied')
+selectedTorrent: Json (nullable)
+- Stores pre-selected torrent data from interactive search
+- Set when approval needed, cleared after admin approval
+- Contains: guid, title, size, seeders, indexer, downloadUrl, format, etc.
 ```
 
 ### Configuration Table
-```
+```prisma
 key: 'auto_approve_requests'
 value: 'true' | 'false' (string)
 ```
 
+## Fixed Issues ✅
+
+**1. BookDate Requests Bypass Approval System**
+- Issue: Requests created through BookDate (right swipe) bypassed approval system entirely
+- Security Impact: Critical - allowed users to bypass admin approval controls
+- Cause: BookDate swipe route created requests with hardcoded 'pending' status, no approval checks, no notifications
+- Fix: Implemented full approval logic in BookDate swipe route (same as POST /api/requests)
+  - Checks user.autoApproveRequests and global auto_approve_requests setting
+  - Sets correct status ('awaiting_approval' or 'pending')
+  - Sends appropriate notifications (request_pending_approval or request_approved)
+  - Only triggers search job if auto-approved
+- Files updated: `src/app/api/bookdate/swipe/route.ts:124-217`, `tests/api/bookdate.routes.test.ts:470-648`
+
 ## Related
 - [Admin Dashboard](../admin-dashboard.md) - Dashboard UI features
 - [Database Schema](../backend/database.md) - User and Request tables
 - [Settings Pages](../settings-pages.md) - Global settings management
+- [BookDate Feature](../features/bookdate.md) - AI recommendations (Fixed Issues #9)
diff --git a/documentation/backend/services/notifications.md b/documentation/backend/services/notifications.md
new file mode 100644
index 0000000..c41e535
--- /dev/null
+++ b/documentation/backend/services/notifications.md
@@ -0,0 +1,182 @@
+# Notification System
+
+**Status:** ✅ Implemented | Extensible notification system with Discord and Pushover support
+
+## Overview
+Sends notifications for audiobook request events (pending approval, approved, available, error) to configured backends. Non-blocking, atomic per-backend failure handling. Proper notification timing for all request flows including interactive search.
+
+## Key Details
+- **Backends:** Discord (webhooks), Pushover (API)
+- **Events:** request_pending_approval, request_approved, request_available, request_error
+- **Encryption:** AES-256-GCM for sensitive config (webhook URLs, API keys)
+- **Delivery:** Async via Bull job queue (priority 5)
+- **Failure Handling:** Non-blocking, Promise.allSettled (one backend fails, others succeed)
+
+## Database Schema
+
+```prisma
+model NotificationBackend {
+  id        String   @id @default(uuid())
+  type      String   // 'discord' | 'pushover'
+  name      String   // User-friendly label
+  config    Json     // Encrypted sensitive values
+  events    Json     // Array of subscribed events
+  enabled   Boolean  @default(true)
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+}
+```
+
+## Event Types
+
+| Event | Trigger | Notification Sent When |
+|-------|---------|------------------------|
+| request_pending_approval | User creates request | Request needs admin approval |
+| request_approved | Admin approves OR auto-approval | Request approved (manual or auto) |
+| request_available | Plex/ABS scan completes | Audiobook available in library |
+| request_error | Download/import fails | Request failed at any stage |
+
+## Notification Triggers
+
+**Request Creation (POST /api/requests)**
+- Automatic search, approval needed: `status === 'awaiting_approval'` → request_pending_approval
+- Automatic search, auto-approved: `status === 'pending'` → request_approved
+- Interactive search: NO notification yet (deferred until torrent selection)
+
+**BookDate Swipe (POST /api/bookdate/swipe)**
+- Right swipe, approval needed: `status === 'awaiting_approval'` → request_pending_approval
+- Right swipe, auto-approved: `status === 'pending'` → request_approved
+
+**Request with Pre-Selected Torrent (POST /api/audiobooks/request-with-torrent)**
+- Approval needed: `status === 'awaiting_approval'` → request_pending_approval
+- Auto-approved: `status === 'downloading'` → request_approved
+
+**Torrent Selection for Existing Request (POST /api/requests/[id]/select-torrent)**
+- Approval needed: `status === 'awaiting_approval'` → request_pending_approval
+- Auto-approved: `status === 'downloading'` → request_approved
+
+**Admin Approval (POST /api/admin/requests/[id]/approve)**
+- Approve (with or without pre-selected torrent): After job triggered → request_approved
+- Deny: No notification
+
+**Request Available (processors: scan-plex, plex-recently-added)**
+- After `status: 'available'` update → request_available
+- Includes user info in query (plexUsername)
+
+**Request Error (processors: monitor-download, organize-files)**
+- After `status: 'failed'` or `status: 'warn'` update → request_error
+- Includes error message in payload
+
+## Configuration Encryption
+
+**Encrypted Values:**
+- Discord: `webhookUrl`
+- Pushover: `userKey`, `appToken`
+
+**Pattern:** `iv:authTag:encryptedData` (base64)
+
+**Masking:** Sensitive values returned as `••••••••` in API responses
+
+**Preservation:** Masked values preserved on update (if value === '••••••••', use existing encrypted value)
+
+## Message Formatting
+
+**Discord (Rich Embeds):**
+- Color-coded by event (yellow=pending, green=approved, blue=available, red=error)
+- Fields: Title, Author, Requested By, Error (if applicable)
+- Footer: Request ID
+- Timestamp: Event time
+
+**Pushover (Plain Text with Emojis):**
+- Emojis: 📬 📬 🎉 ❌
+- Priority: Normal (0) for pending/approved, High (1) for available/error
+- Format: Event title + book details + user + error (if applicable)
+
+## API Endpoints
+
+**GET /api/admin/notifications**
+- Returns all backends (sensitive values masked)
+
+**POST /api/admin/notifications**
+- Create backend (encrypts sensitive values)
+- Body: `{type, name, config, events, enabled}`
+
+**GET /api/admin/notifications/[id]**
+- Get single backend (sensitive values masked)
+
+**PUT /api/admin/notifications/[id]**
+- Update backend (preserves masked values, encrypts new values)
+
+**DELETE /api/admin/notifications/[id]**
+- Delete backend
+
+**POST /api/admin/notifications/test**
+- Test notification (synchronous, not via job queue)
+- Body: `{type, config}` (plaintext for testing)
+- Sends test payload: "The Hitchhiker's Guide to the Galaxy" by Douglas Adams
+
+## UI Components
+
+**NotificationsTab (src/app/admin/settings/tabs/NotificationsTab)**
+- Type selector cards (Discord: indigo "D", Pushover: blue "P")
+- Configured backends grid (3 columns)
+- Backend cards: type icon, name, enabled status, event count, edit/delete actions
+- Modal: type-specific forms, event checkboxes, enable toggle, test button
+
+**Modal Features:**
+- Type-first selection (user clicks "Add Discord" or "Add Pushover")
+- Password inputs for sensitive values
+- Event subscription checkboxes (4 events, default: available + error)
+- Test button (sends synchronous test notification)
+- Save button (validates and creates/updates backend)
+
+## Job Queue Integration
+
+**Job Type:** `send_notification` (priority 5, concurrency 5)
+
+**Payload:**
+```typescript
+{
+  jobId?: string,
+  event: string,
+  requestId: string,
+  title: string,
+  author: string,
+  userName: string,
+  message?: string,
+  timestamp: Date
+}
+```
+
+**Processor:** `src/lib/processors/send-notification.processor.ts`
+- Calls NotificationService.sendNotification()
+- Non-blocking error handling (logs but doesn't throw)
+
+**Queue Method:** `addNotificationJob(event, requestId, title, author, userName, message?)`
+
+## Extensibility
+
+**Adding New Backend (e.g., Email):**
+1. Add 'email' to NotificationBackendType enum
+2. Create EmailConfig interface
+3. Add encryption logic for smtpPassword
+4. Implement sendEmail() method in NotificationService
+5. Add email card to type selector (green "E" badge)
+6. Add email form fields to modal
+
+**Adding New Event (e.g., download_complete):**
+1. Add 'download_complete' to NotificationEvent enum
+2. Add to event labels in UI
+3. Add trigger point in processor
+4. Add message formatting in Discord/Pushover formatters
+
+## Tech Stack
+- Bull (job queue)
+- Node.js crypto (AES-256-GCM encryption)
+- Discord webhooks, Pushover API
+- React (UI), Tailwind CSS (styling)
+
+## Related
+- [Job Queue System](jobs.md)
+- [Config Encryption](config.md)
+- [Settings Pages](../../settings-pages.md)
diff --git a/documentation/features/bookdate.md b/documentation/features/bookdate.md
index ee344e4..88a46c0 100644
--- a/documentation/features/bookdate.md
+++ b/documentation/features/bookdate.md
@@ -425,6 +425,30 @@ Personalized audiobook discovery using OpenAI/Claude APIs. Admin configures AI p
   - Added tests to verify 401 from external provider returns 400 to client
 - Files updated: `src/app/api/bookdate/test-connection/route.ts:190-197,382-389`, `tests/api/bookdate-test-connection.routes.test.ts:254-294`
 
+**9. BookDate Requests Bypass Approval System**
+- Issue: Requests created through BookDate (right swipe) bypass the approval system entirely
+- User Experience: "BookDate requests don't go through approval even when approval is required, and I don't get any notifications about them"
+- Security Impact: Critical - allows users to bypass admin approval controls
+- Cause: BookDate swipe route created requests directly without checking approval requirements
+  - `src/app/api/bookdate/swipe/route.ts:124-146` hardcoded status as 'pending'
+  - Did not check user.autoApproveRequests or global auto_approve_requests setting
+  - Did not send any notifications (pending approval or approved)
+  - Immediately triggered search job regardless of approval status
+  - Contrast with POST /api/requests which properly implements approval logic
+- Fix: Implement full approval logic in BookDate swipe route (same as POST /api/requests)
+  - Fetch user with autoApproveRequests setting
+  - Check approval requirements: user setting → global setting → default (true)
+  - Set status: 'awaiting_approval' if approval needed, 'pending' if auto-approved
+  - Send appropriate notification: request_pending_approval or request_approved
+  - Only trigger search job if auto-approved (not if awaiting approval)
+  - Admins always auto-approve (role === 'admin')
+- Files updated: `src/app/api/bookdate/swipe/route.ts:124-217`, `tests/api/bookdate.routes.test.ts:470-648`
+- Tests added:
+  - Admin user auto-approves (status: 'pending', sends approved notification, triggers search)
+  - User with autoApproveRequests=false requires approval (status: 'awaiting_approval', sends pending notification, no search)
+  - User with autoApproveRequests=true auto-approves (status: 'pending', sends approved notification, triggers search)
+  - User with autoApproveRequests=null checks global setting
+
 ## Related
 
 - Full requirements: [features/bookdate-prd.md](bookdate-prd.md)
diff --git a/documentation/phase3/qbittorrent.md b/documentation/phase3/qbittorrent.md
index e9e1403..1c1ec62 100644
--- a/documentation/phase3/qbittorrent.md
+++ b/documentation/phase3/qbittorrent.md
@@ -88,35 +88,54 @@ This prevents issues where category retains old save path after user changes `do
 **Use Case:** qBittorrent runs on different machine/container with different filesystem perspective.
 
 **Example Scenario:**
-- qBittorrent reports: `/remote/mnt/d/done/Audiobook.Name`
-- ReadMeABook needs: `/downloads/Audiobook.Name`
-- Mapping: Remote `/remote/mnt/d/done` → Local `/downloads`
+- qBittorrent on Windows expects: `F:\Docker\downloads\completed\books`
+- ReadMeABook inside Docker sees: `/downloads`
+- Mapping: Remote `F:\Docker\downloads\completed\books` ↔ Local `/downloads`
 
 **Configuration:**
 1. Admin Settings → Download Client → Enable Remote Path Mapping
-2. Enter remote path (as reported by qBittorrent)
-3. Enter local path (accessible to ReadMeABook)
+2. Enter remote path (as qBittorrent sees it, e.g., `F:\Docker\downloads\completed\books`)
+3. Enter local path (as RMAB sees it, e.g., `/downloads`)
 4. Test connection validates local path exists
 5. Save settings
 
+**Bidirectional Path Mapping:**
+
+**1. Outgoing (RMAB → qBittorrent):** When adding torrents
+- RMAB's download path: `/downloads`
+- Translated to qBit's path: `F:\Docker\downloads\completed\books`
+- Applied in `qbittorrent.service.ts` via `PathMapper.reverseTransform()`
+- Ensures qBittorrent knows where to save files
+
+**2. Incoming (qBittorrent → RMAB):** When processing completed downloads
+- qBit reports: `F:\Docker\downloads\completed\books\Audiobook.Name`
+- Translated to RMAB's path: `/downloads/Audiobook.Name`
+- Applied in `monitor-download.processor.ts` via `PathMapper.transform()`
+- Applied in `retry-failed-imports.processor.ts` for failed imports
+- Ensures RMAB can find and organize files
+
 **Implementation:**
 - `PathMapper` utility (`src/lib/utils/path-mapper.ts`) handles transformation
-- Applied in `monitor-download.processor.ts` when download completes
-- Applied in `retry-failed-imports.processor.ts` for failed imports
+- `transform()`: Remote → Local (qBit → RMAB)
+- `reverseTransform()`: Local → Remote (RMAB → qBit)
 - Uses simple prefix replacement with path normalization
-- Graceful fallback: if path doesn't match remote prefix, returns unchanged
+- Preserves Windows backslashes when translating to Windows paths
+- Graceful fallback: if path doesn't match prefix, returns unchanged
+
+**Path Transformation Examples:**
 
-**Path Transformation:**
 ```typescript
-// Input from qBittorrent
-qbPath = "/remote/mnt/d/done/Audiobook.Name"
-
-// Config
-remotePath = "/remote/mnt/d/done"
+// Outgoing: RMAB → qBittorrent (when adding torrent)
 localPath = "/downloads"
+config = { remotePath: "F:\\Docker\\downloads\\completed\\books", localPath: "/downloads" }
+remotePath = PathMapper.reverseTransform(localPath, config)
+// Result: "F:\Docker\downloads\completed\books"
 
-// Output (used for file organization)
-organizePath = "/downloads/Audiobook.Name"
+// Incoming: qBittorrent → RMAB (when processing completion)
+qbPath = "F:\\Docker\\downloads\\completed\\books\\Audiobook.Name"
+config = { remotePath: "F:\\Docker\\downloads\\completed\\books", localPath: "/downloads" }
+organizePath = PathMapper.transform(qbPath, config)
+// Result: "/downloads/Audiobook.Name"
 ```
 
 **Validation:**
@@ -126,9 +145,10 @@ organizePath = "/downloads/Audiobook.Name"
 
 **Behavior:**
 - Mapping only applies when enabled
-- If path doesn't start with remote prefix, returns original (logs warning)
+- If path doesn't start with expected prefix, returns original (logs warning)
 - Path normalization handles trailing slashes, backslashes, redundant separators
 - Works with both `content_path` and constructed `save_path + name`
+- Preserves native path separators (important for Windows)
 
 ## Data Models
 
@@ -188,6 +208,13 @@ type TorrentState = 'downloading' | 'uploading' | 'stalledDL' |
    - Applied to axios client instance and all standalone requests
    - Works transparently with or without reverse proxy
    - Compatible with popular seedbox providers (seedit4.me, etc.)
+**14. Remote path mapping not applied when adding torrents** - When qBittorrent runs locally (e.g., Windows) and RMAB runs in Docker, savepath sent to qBittorrent was not translated. qBittorrent received `/downloads` (RMAB's path) but expected `F:\Docker\downloads\completed\books` (Windows path), causing "Invalid path" errors. Fixed by:
+   - Added `PathMapper.reverseTransform()` for bidirectional path mapping (local → remote)
+   - Applied in `qbittorrent.service.ts` when setting savepath for torrents
+   - Preserves Windows backslashes when translating to Windows paths
+   - Path mapping now works in both directions: outgoing (RMAB → qBit) and incoming (qBit → RMAB)
+   - Service constructor accepts `PathMappingConfig` parameter
+   - Singleton loads path mapping config from database
 
 ## Tech Stack
 
diff --git a/documentation/settings-pages.md b/documentation/settings-pages.md
index d8e5735..bce650e 100644
--- a/documentation/settings-pages.md
+++ b/documentation/settings-pages.md
@@ -70,6 +70,7 @@ src/app/admin/settings/
 4. **Download Client** - Type, URL, credentials (masked)
 5. **Paths** - Download + media directories, audiobook organization template, metadata tagging toggle, chapter merging toggle
 6. **BookDate** - AI provider, API key (encrypted), model selection, library scope, custom prompt, swipe history
+7. **Notifications** - Multiple backends (Discord, Pushover), event subscriptions, test functionality
 
 ## Audible Region
 
@@ -300,3 +301,38 @@ src/app/admin/settings/
   - Allow saving indexer config changes without re-testing connection
   - Button text adapts: "Test Connection" vs "Refresh Indexers"
 - Behavior: Natural workflow - see current settings, modify indexers, save immediately
+
+## Notifications
+
+**Purpose:** Configure notification backends to receive alerts for audiobook request events.
+
+**Configuration:**
+- Multiple backends per type (Discord, Pushover)
+- Per-backend event subscriptions (4 events)
+- Encrypted sensitive values (webhook URLs, API keys)
+- Enable/disable toggle per backend
+
+**UI (NotificationsTab):**
+- Type selector cards: Discord (indigo "D"), Pushover (blue "P")
+- Grid layout for configured backends (3 columns)
+- Card shows: type icon, name, enabled status, event count
+- Edit/delete actions per card
+
+**Modal (NotificationConfigModal):**
+- Type-specific forms (Discord: webhook/username/avatar, Pushover: keys/priority)
+- Event subscription checkboxes (4 events)
+- Enable/disable toggle
+- Test button (sends sample notification)
+- Password masking for sensitive values
+
+**Event Types:**
+- Request Pending Approval - Admin approval required
+- Request Approved - Approved (manual or auto)
+- Request Available - Available in library
+- Request Error - Failed at any stage
+
+**Validation:**
+- Name required
+- Discord: webhook URL required
+- Pushover: user key + app token required
+- At least one event selected
diff --git a/prisma/migrations/20260121000000_add_selected_torrent_to_requests/migration.sql b/prisma/migrations/20260121000000_add_selected_torrent_to_requests/migration.sql
new file mode 100644
index 0000000..5998db9
--- /dev/null
+++ b/prisma/migrations/20260121000000_add_selected_torrent_to_requests/migration.sql
@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "requests" ADD COLUMN "selected_torrent" JSONB;
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 7a28c7a..388f563 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -210,6 +210,7 @@ model Request {
   progress         Int       @default(0) // 0-100
   priority         Int       @default(0)
   errorMessage     String?   @map("error_message") @db.Text
+  selectedTorrent  Json?     @map("selected_torrent") // Pre-selected torrent from interactive search (stored when awaiting approval)
   searchAttempts   Int       @default(0) @map("search_attempts")
   downloadAttempts Int       @default(0) @map("download_attempts")
   importAttempts   Int       @default(0) @map("import_attempts")
@@ -420,3 +421,17 @@ model BookDateSwipe {
   @@index([recommendationId])
   @@map("bookdate_swipes")
 }
+
+model NotificationBackend {
+  id        String   @id @default(uuid())
+  type      String   // 'discord' | 'pushover' | 'email' | 'slack' | 'telegram' | 'webhook'
+  name      String   // User-friendly label
+  config    Json     // Type-specific config (encrypted sensitive values)
+  events    Json     @default("[]") // Array of event strings
+  enabled   Boolean  @default(true)
+  createdAt DateTime @default(now()) @map("created_at")
+  updatedAt DateTime @updatedAt @map("updated_at")
+
+  @@index([enabled])
+  @@map("notification_backends")
+}
diff --git a/screenshots/ADMIN.png b/screenshots/ADMIN.png
new file mode 100644
index 0000000..89e3cfa
Binary files /dev/null and b/screenshots/ADMIN.png differ
diff --git a/screenshots/BOOKDATE.png b/screenshots/BOOKDATE.png
new file mode 100644
index 0000000..8dc9a33
Binary files /dev/null and b/screenshots/BOOKDATE.png differ
diff --git a/screenshots/HOMEPAGE.png b/screenshots/HOMEPAGE.png
new file mode 100644
index 0000000..1365b38
Binary files /dev/null and b/screenshots/HOMEPAGE.png differ
diff --git a/screenshots/RMAB_hero.png b/screenshots/RMAB_hero.png
new file mode 100644
index 0000000..af6c9ef
Binary files /dev/null and b/screenshots/RMAB_hero.png differ
diff --git a/src/app/admin/settings/lib/helpers.ts b/src/app/admin/settings/lib/helpers.ts
index 1eecfdd..b5ee1af 100644
--- a/src/app/admin/settings/lib/helpers.ts
+++ b/src/app/admin/settings/lib/helpers.ts
@@ -212,4 +212,5 @@ export const getTabs = (backendMode: 'plex' | 'audiobookshelf') => [
   { id: 'paths' as const, label: 'Paths', icon: '📁' },
   { id: 'ebook' as const, label: 'E-book Sidecar', icon: '📖' },
   { id: 'bookdate' as const, label: 'BookDate', icon: '📚' },
+  { id: 'notifications' as const, label: 'Notifications', icon: '🔔' },
 ];
diff --git a/src/app/admin/settings/lib/types.ts b/src/app/admin/settings/lib/types.ts
index 0f6ffc3..df5a933 100644
--- a/src/app/admin/settings/lib/types.ts
+++ b/src/app/admin/settings/lib/types.ts
@@ -226,4 +226,4 @@ export interface BookDateModel {
 /**
  * Tab identifier type
  */
-export type SettingsTab = 'library' | 'auth' | 'prowlarr' | 'download' | 'paths' | 'ebook' | 'bookdate';
+export type SettingsTab = 'library' | 'auth' | 'prowlarr' | 'download' | 'paths' | 'ebook' | 'bookdate' | 'notifications';
diff --git a/src/app/admin/settings/page.tsx b/src/app/admin/settings/page.tsx
index e09ba4f..ff2d3ca 100644
--- a/src/app/admin/settings/page.tsx
+++ b/src/app/admin/settings/page.tsx
@@ -22,6 +22,7 @@ import { DownloadTab } from './tabs/DownloadTab/DownloadTab';
 import { PathsTab } from './tabs/PathsTab/PathsTab';
 import { EbookTab } from './tabs/EbookTab/EbookTab';
 import { BookDateTab } from './tabs/BookDateTab/BookDateTab';
+import { NotificationsTab } from './tabs/NotificationsTab';
 
 // Types and Helpers
 import type { Settings, SettingsTab, IndexerConfig, SavedIndexerConfig, Message } from './lib/types';
@@ -328,8 +329,11 @@ export default function AdminSettings() {
             />
           )}
 
+          {/* Notifications Tab */}
+          {activeTab === 'notifications' && <NotificationsTab />}
+
           {/* Save Button (only for tabs that save through main page) */}
-          {activeTab !== 'ebook' && activeTab !== 'bookdate' && (
+          {activeTab !== 'ebook' && activeTab !== 'bookdate' && activeTab !== 'notifications' && (
             <div className="mt-8 flex gap-4">
               <Button
                 onClick={saveSettings}
diff --git a/src/app/admin/settings/tabs/NotificationsTab/NotificationsTab.tsx b/src/app/admin/settings/tabs/NotificationsTab/NotificationsTab.tsx
new file mode 100644
index 0000000..1dc9d4f
--- /dev/null
+++ b/src/app/admin/settings/tabs/NotificationsTab/NotificationsTab.tsx
@@ -0,0 +1,455 @@
+'use client';
+
+import { useState, useEffect } from 'react';
+import { RMABLogger } from '@/lib/utils/logger';
+import { fetchWithAuth } from '@/lib/utils/api';
+
+const logger = RMABLogger.create('NotificationsTab');
+
+interface NotificationBackend {
+  id: string;
+  type: string;
+  name: string;
+  config: Record<string, any>;
+  events: string[];
+  enabled: boolean;
+  createdAt: string;
+  updatedAt: string;
+}
+
+interface ModalState {
+  isOpen: boolean;
+  mode: 'add' | 'edit';
+  selectedType?: string;
+  backend?: NotificationBackend;
+}
+
+const typeColors: Record<string, string> = {
+  discord: 'bg-indigo-500',
+  pushover: 'bg-blue-500',
+  email: 'bg-green-500',
+  slack: 'bg-purple-500',
+  telegram: 'bg-sky-500',
+  webhook: 'bg-gray-500',
+};
+
+const eventLabels: Record<string, string> = {
+  request_pending_approval: 'Request Pending Approval',
+  request_approved: 'Request Approved',
+  request_available: 'Audiobook Available',
+  request_error: 'Request Error',
+};
+
+export function NotificationsTab() {
+  const [backends, setBackends] = useState<NotificationBackend[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [modalState, setModalState] = useState<ModalState>({
+    isOpen: false,
+    mode: 'add',
+  });
+  const [formData, setFormData] = useState<any>({
+    name: '',
+    config: {},
+    events: ['request_available', 'request_error'],
+    enabled: true,
+  });
+  const [testResult, setTestResult] = useState<{ success: boolean; message: string } | null>(null);
+  const [isTesting, setIsTesting] = useState(false);
+  const [isSaving, setIsSaving] = useState(false);
+
+  useEffect(() => {
+    fetchBackends();
+  }, []);
+
+  const fetchBackends = async () => {
+    try {
+      setLoading(true);
+      const response = await fetchWithAuth('/api/admin/notifications');
+
+      if (response.ok) {
+        const data = await response.json();
+        if (data.success) {
+          setBackends(data.backends);
+        } else {
+          logger.error('Failed to fetch backends', { error: data.error });
+        }
+      } else {
+        logger.error('Failed to fetch backends', { status: response.status });
+      }
+    } catch (error) {
+      logger.error('Failed to fetch backends', { error: error instanceof Error ? error.message : String(error) });
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const openAddModal = (type: string) => {
+    setModalState({ isOpen: true, mode: 'add', selectedType: type });
+    setFormData({
+      name: `${type.charAt(0).toUpperCase() + type.slice(1)} Notifications`,
+      config: type === 'discord' ? { webhookUrl: '', username: 'ReadMeABook', avatarUrl: '' } : { userKey: '', appToken: '', device: '', priority: 0 },
+      events: ['request_available', 'request_error'],
+      enabled: true,
+    });
+    setTestResult(null);
+  };
+
+  const openEditModal = (backend: NotificationBackend) => {
+    setModalState({ isOpen: true, mode: 'edit', selectedType: backend.type, backend });
+    setFormData({
+      name: backend.name,
+      config: backend.config,
+      events: backend.events,
+      enabled: backend.enabled,
+    });
+    setTestResult(null);
+  };
+
+  const closeModal = () => {
+    setModalState({ isOpen: false, mode: 'add' });
+    setTestResult(null);
+  };
+
+  const handleTest = async () => {
+    if (!modalState.selectedType) return;
+
+    try {
+      setIsTesting(true);
+      setTestResult(null);
+
+      const response = await fetchWithAuth('/api/admin/notifications/test', {
+        method: 'POST',
+        body: JSON.stringify({
+          type: modalState.selectedType,
+          config: formData.config,
+        }),
+      });
+
+      const data = await response.json();
+
+      if (response.ok && data.success) {
+        setTestResult({ success: true, message: 'Test notification sent successfully!' });
+      } else {
+        setTestResult({ success: false, message: data.message || 'Failed to send test notification' });
+      }
+    } catch (error) {
+      setTestResult({ success: false, message: error instanceof Error ? error.message : 'Unknown error' });
+    } finally {
+      setIsTesting(false);
+    }
+  };
+
+  const handleSave = async () => {
+    if (!modalState.selectedType) return;
+
+    try {
+      setIsSaving(true);
+
+      const url = modalState.mode === 'add' ? '/api/admin/notifications' : `/api/admin/notifications/${modalState.backend?.id}`;
+      const method = modalState.mode === 'add' ? 'POST' : 'PUT';
+
+      const response = await fetchWithAuth(url, {
+        method,
+        body: JSON.stringify({
+          type: modalState.selectedType,
+          ...formData,
+        }),
+      });
+
+      const data = await response.json();
+
+      if (response.ok && data.success) {
+        await fetchBackends();
+        closeModal();
+      } else {
+        setTestResult({ success: false, message: data.message || 'Failed to save backend' });
+      }
+    } catch (error) {
+      setTestResult({ success: false, message: error instanceof Error ? error.message : 'Unknown error' });
+    } finally {
+      setIsSaving(false);
+    }
+  };
+
+  const handleDelete = async (id: string) => {
+    if (!confirm('Are you sure you want to delete this notification backend?')) return;
+
+    try {
+      const response = await fetchWithAuth(`/api/admin/notifications/${id}`, {
+        method: 'DELETE',
+      });
+
+      if (response.ok) {
+        const data = await response.json();
+        if (data.success) {
+          await fetchBackends();
+        }
+      }
+    } catch (error) {
+      logger.error('Failed to delete backend', { error: error instanceof Error ? error.message : String(error) });
+    }
+  };
+
+  return (
+    <div className="space-y-6">
+      {/* Header */}
+      <div>
+        <h2 className="text-2xl font-bold text-gray-900 dark:text-white">Notifications</h2>
+        <p className="mt-2 text-sm text-gray-600 dark:text-gray-400">
+          Configure notification backends to receive alerts for audiobook request events.
+        </p>
+      </div>
+
+      {/* Type Selector */}
+      <div>
+        <h3 className="text-lg font-semibold text-gray-900 dark:text-white mb-4">Add Notification Backend</h3>
+        <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
+          <button
+            onClick={() => openAddModal('discord')}
+            className="flex items-center p-4 bg-white dark:bg-gray-800 rounded-lg border-2 border-gray-200 dark:border-gray-700 hover:border-gray-300 dark:hover:border-gray-600 transition-colors"
+          >
+            <div className="flex-shrink-0 w-12 h-12 bg-indigo-500 rounded-lg flex items-center justify-center text-white font-bold text-2xl">
+              D
+            </div>
+            <div className="ml-4 text-left">
+              <div className="font-semibold text-gray-900 dark:text-white">Discord</div>
+              <div className="text-sm text-gray-600 dark:text-gray-400">Send notifications via Discord webhook</div>
+            </div>
+          </button>
+
+          <button
+            onClick={() => openAddModal('pushover')}
+            className="flex items-center p-4 bg-white dark:bg-gray-800 rounded-lg border-2 border-gray-200 dark:border-gray-700 hover:border-gray-300 dark:hover:border-gray-600 transition-colors"
+          >
+            <div className="flex-shrink-0 w-12 h-12 bg-blue-500 rounded-lg flex items-center justify-center text-white font-bold text-2xl">
+              P
+            </div>
+            <div className="ml-4 text-left">
+              <div className="font-semibold text-gray-900 dark:text-white">Pushover</div>
+              <div className="text-sm text-gray-600 dark:text-gray-400">Send notifications via Pushover API</div>
+            </div>
+          </button>
+        </div>
+      </div>
+
+      {/* Configured Backends */}
+      <div>
+        <h3 className="text-lg font-semibold text-gray-900 dark:text-white mb-4">Configured Backends</h3>
+        {loading ? (
+          <p className="text-gray-600 dark:text-gray-400">Loading...</p>
+        ) : backends.length === 0 ? (
+          <p className="text-gray-600 dark:text-gray-400">No notification backends configured.</p>
+        ) : (
+          <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
+            {backends.map((backend) => (
+              <div key={backend.id} className="bg-white dark:bg-gray-800 rounded-lg shadow-md border border-gray-200 dark:border-gray-700 p-4 hover:shadow-lg transition-shadow">
+                <div className="flex items-start justify-between mb-3">
+                  <div className="flex items-center space-x-3">
+                    <div className={`w-10 h-10 ${typeColors[backend.type]} rounded-lg flex items-center justify-center text-white font-bold`}>
+                      {backend.type.charAt(0).toUpperCase()}
+                    </div>
+                    <div>
+                      <div className="font-semibold text-gray-900 dark:text-white truncate">{backend.name}</div>
+                      <div className="text-xs text-gray-500 dark:text-gray-400 capitalize">{backend.type}</div>
+                    </div>
+                  </div>
+                </div>
+                <div className="space-y-2 mb-3">
+                  <div className={`inline-block px-2 py-1 rounded text-xs ${backend.enabled ? 'bg-green-100 text-green-800 dark:bg-green-900 dark:text-green-200' : 'bg-gray-100 text-gray-800 dark:bg-gray-700 dark:text-gray-300'}`}>
+                    {backend.enabled ? 'Enabled' : 'Disabled'}
+                  </div>
+                  <div className="text-sm text-gray-600 dark:text-gray-400">
+                    {backend.events.length} {backend.events.length === 1 ? 'event' : 'events'} subscribed
+                  </div>
+                </div>
+                <div className="flex space-x-2">
+                  <button
+                    onClick={() => openEditModal(backend)}
+                    className="flex-1 px-3 py-1.5 text-sm bg-blue-600 hover:bg-blue-700 text-white rounded transition-colors"
+                  >
+                    Edit
+                  </button>
+                  <button
+                    onClick={() => handleDelete(backend.id)}
+                    className="flex-1 px-3 py-1.5 text-sm bg-red-600 hover:bg-red-700 text-white rounded transition-colors"
+                  >
+                    Delete
+                  </button>
+                </div>
+              </div>
+            ))}
+          </div>
+        )}
+      </div>
+
+      {/* Modal */}
+      {modalState.isOpen && modalState.selectedType && (
+        <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50 p-4">
+          <div className="bg-white dark:bg-gray-800 rounded-lg shadow-xl max-w-2xl w-full max-h-[90vh] overflow-y-auto">
+            <div className="p-6">
+              <div className="flex items-center justify-between mb-6">
+                <h3 className="text-xl font-bold text-gray-900 dark:text-white">
+                  {modalState.mode === 'add' ? 'Add' : 'Edit'} {modalState.selectedType.charAt(0).toUpperCase() + modalState.selectedType.slice(1)} Notification
+                </h3>
+                <button onClick={closeModal} className="text-gray-400 hover:text-gray-600 dark:hover:text-gray-200">
+                  <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
+                  </svg>
+                </button>
+              </div>
+
+              <div className="space-y-4">
+                {/* Name */}
+                <div>
+                  <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">Name</label>
+                  <input
+                    type="text"
+                    value={formData.name}
+                    onChange={(e) => setFormData({ ...formData, name: e.target.value })}
+                    className="w-full px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-700 text-gray-900 dark:text-white"
+                    placeholder="e.g., Discord - Admins"
+                  />
+                </div>
+
+                {/* Config Fields */}
+                {modalState.selectedType === 'discord' && (
+                  <>
+                    <div>
+                      <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">Webhook URL *</label>
+                      <input
+                        type="text"
+                        value={formData.config.webhookUrl}
+                        onChange={(e) => setFormData({ ...formData, config: { ...formData.config, webhookUrl: e.target.value } })}
+                        className="w-full px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-700 text-gray-900 dark:text-white"
+                        placeholder="https://discord.com/api/webhooks/..."
+                      />
+                    </div>
+                    <div>
+                      <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">Username (optional)</label>
+                      <input
+                        type="text"
+                        value={formData.config.username}
+                        onChange={(e) => setFormData({ ...formData, config: { ...formData.config, username: e.target.value } })}
+                        className="w-full px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-700 text-gray-900 dark:text-white"
+                        placeholder="ReadMeABook"
+                      />
+                    </div>
+                  </>
+                )}
+
+                {modalState.selectedType === 'pushover' && (
+                  <>
+                    <div>
+                      <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">User Key *</label>
+                      <input
+                        type="text"
+                        value={formData.config.userKey}
+                        onChange={(e) => setFormData({ ...formData, config: { ...formData.config, userKey: e.target.value } })}
+                        className="w-full px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-700 text-gray-900 dark:text-white"
+                        placeholder="Your Pushover user key"
+                      />
+                    </div>
+                    <div>
+                      <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">App Token *</label>
+                      <input
+                        type="text"
+                        value={formData.config.appToken}
+                        onChange={(e) => setFormData({ ...formData, config: { ...formData.config, appToken: e.target.value } })}
+                        className="w-full px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-700 text-gray-900 dark:text-white"
+                        placeholder="Your Pushover app token"
+                      />
+                    </div>
+                    <div>
+                      <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">Priority</label>
+                      <select
+                        value={formData.config.priority}
+                        onChange={(e) => setFormData({ ...formData, config: { ...formData.config, priority: Number(e.target.value) } })}
+                        className="w-full px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-700 text-gray-900 dark:text-white"
+                      >
+                        <option value="-2">Lowest</option>
+                        <option value="-1">Low</option>
+                        <option value="0">Normal</option>
+                        <option value="1">High</option>
+                        <option value="2">Emergency</option>
+                      </select>
+                    </div>
+                  </>
+                )}
+
+                {/* Events */}
+                <div>
+                  <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">Subscribe to Events *</label>
+                  <div className="space-y-2">
+                    {Object.entries(eventLabels).map(([event, label]) => (
+                      <label key={event} className="flex items-center space-x-2 p-3 border border-gray-300 dark:border-gray-600 rounded-lg cursor-pointer hover:bg-gray-50 dark:hover:bg-gray-700">
+                        <input
+                          type="checkbox"
+                          checked={formData.events.includes(event)}
+                          onChange={(e) => {
+                            if (e.target.checked) {
+                              setFormData({ ...formData, events: [...formData.events, event] });
+                            } else {
+                              setFormData({ ...formData, events: formData.events.filter((e: string) => e !== event) });
+                            }
+                          }}
+                          className="rounded"
+                        />
+                        <span className="text-sm text-gray-900 dark:text-white">{label}</span>
+                      </label>
+                    ))}
+                  </div>
+                </div>
+
+                {/* Enabled Toggle */}
+                <div>
+                  <label className="flex items-center space-x-2 cursor-pointer">
+                    <input
+                      type="checkbox"
+                      checked={formData.enabled}
+                      onChange={(e) => setFormData({ ...formData, enabled: e.target.checked })}
+                      className="rounded"
+                    />
+                    <span className="text-sm text-gray-900 dark:text-white">Enable this notification backend</span>
+                  </label>
+                </div>
+
+                {/* Test Result */}
+                {testResult && (
+                  <div className={`p-3 rounded-lg ${testResult.success ? 'bg-green-100 dark:bg-green-900 border border-green-300 dark:border-green-700 text-green-800 dark:text-green-200' : 'bg-red-100 dark:bg-red-900 border border-red-300 dark:border-red-700 text-red-800 dark:text-red-200'}`}>
+                    {testResult.message}
+                  </div>
+                )}
+
+                {/* Actions */}
+                <div className="flex justify-between pt-4 border-t border-gray-200 dark:border-gray-700">
+                  <button
+                    onClick={handleTest}
+                    disabled={isTesting}
+                    className="px-4 py-2 border border-gray-300 dark:border-gray-600 text-gray-700 dark:text-gray-300 rounded-lg hover:bg-gray-50 dark:hover:bg-gray-700 disabled:opacity-50"
+                  >
+                    {isTesting ? 'Testing...' : 'Send Test'}
+                  </button>
+                  <div className="flex space-x-2">
+                    <button
+                      onClick={closeModal}
+                      className="px-4 py-2 border border-gray-300 dark:border-gray-600 text-gray-700 dark:text-gray-300 rounded-lg hover:bg-gray-50 dark:hover:bg-gray-700"
+                    >
+                      Cancel
+                    </button>
+                    <button
+                      onClick={handleSave}
+                      disabled={isSaving}
+                      className="px-4 py-2 bg-blue-600 hover:bg-blue-700 text-white rounded-lg disabled:opacity-50"
+                    >
+                      {isSaving ? 'Saving...' : (modalState.mode === 'add' ? 'Add Backend' : 'Save Changes')}
+                    </button>
+                  </div>
+                </div>
+              </div>
+            </div>
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}
diff --git a/src/app/admin/settings/tabs/NotificationsTab/index.ts b/src/app/admin/settings/tabs/NotificationsTab/index.ts
new file mode 100644
index 0000000..b26d349
--- /dev/null
+++ b/src/app/admin/settings/tabs/NotificationsTab/index.ts
@@ -0,0 +1 @@
+export { NotificationsTab } from './NotificationsTab';
diff --git a/src/app/api/admin/notifications/[id]/route.ts b/src/app/api/admin/notifications/[id]/route.ts
new file mode 100644
index 0000000..4a47bc1
--- /dev/null
+++ b/src/app/api/admin/notifications/[id]/route.ts
@@ -0,0 +1,226 @@
+/**
+ * Component: Notification Backend Individual API
+ * Documentation: documentation/backend/services/notifications.md
+ */
+
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAuth, requireAdmin, AuthenticatedRequest } from '@/lib/middleware/auth';
+import { prisma } from '@/lib/db';
+import { getNotificationService, NotificationBackendType } from '@/lib/services/notification.service';
+import { RMABLogger } from '@/lib/utils/logger';
+import { z } from 'zod';
+
+const logger = RMABLogger.create('API.Admin.Notifications.Id');
+
+const UpdateBackendSchema = z.object({
+  name: z.string().min(1).optional(),
+  config: z.record(z.any()).optional(),
+  events: z.array(z.enum(['request_pending_approval', 'request_approved', 'request_available', 'request_error'])).min(1).optional(),
+  enabled: z.boolean().optional(),
+});
+
+/**
+ * GET /api/admin/notifications/[id]
+ * Get single notification backend (sensitive values masked)
+ */
+export async function GET(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  return requireAuth(request, async (req: AuthenticatedRequest) => {
+    return requireAdmin(req, async () => {
+      try {
+        const { id } = await params;
+
+        const backend = await prisma.notificationBackend.findUnique({
+          where: { id },
+        });
+
+        if (!backend) {
+          return NextResponse.json(
+            { error: 'NotFound', message: 'Notification backend not found' },
+            { status: 404 }
+          );
+        }
+
+        const notificationService = getNotificationService();
+
+        // Mask sensitive config values
+        return NextResponse.json({
+          success: true,
+          backend: {
+            ...backend,
+            config: notificationService.maskConfig(backend.type as NotificationBackendType, backend.config),
+          },
+        });
+      } catch (error) {
+        logger.error('Failed to fetch notification backend', {
+          error: error instanceof Error ? error.message : String(error),
+        });
+
+        return NextResponse.json(
+          {
+            error: 'FetchError',
+            message: 'Failed to fetch notification backend',
+          },
+          { status: 500 }
+        );
+      }
+    });
+  });
+}
+
+/**
+ * PUT /api/admin/notifications/[id]
+ * Update notification backend
+ */
+export async function PUT(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  return requireAuth(request, async (req: AuthenticatedRequest) => {
+    return requireAdmin(req, async () => {
+      try {
+        const { id } = await params;
+        const body = await request.json();
+        const updates = UpdateBackendSchema.parse(body);
+
+        // Get existing backend
+        const existing = await prisma.notificationBackend.findUnique({
+          where: { id },
+        });
+
+        if (!existing) {
+          return NextResponse.json(
+            { error: 'NotFound', message: 'Notification backend not found' },
+            { status: 404 }
+          );
+        }
+
+        const notificationService = getNotificationService();
+
+        // Handle config updates (preserve masked values, encrypt new values)
+        let finalConfig = existing.config;
+        if (updates.config) {
+          const existingConfig = existing.config as any;
+          const updatedConfig = updates.config as any;
+
+          // Check if masked values need to be preserved
+          Object.keys(updatedConfig).forEach((key) => {
+            if (updatedConfig[key] === '••••••••') {
+              // Preserve existing encrypted value
+              updatedConfig[key] = existingConfig[key];
+            }
+          });
+
+          // Encrypt new/changed values
+          finalConfig = notificationService.encryptConfig(existing.type as NotificationBackendType, updatedConfig);
+        }
+
+        // Update backend
+        const updateData: any = {};
+        if (updates.name) updateData.name = updates.name;
+        if (updates.config) updateData.config = finalConfig;
+        if (updates.events) updateData.events = updates.events;
+        if (updates.enabled !== undefined) updateData.enabled = updates.enabled;
+
+        const updated = await prisma.notificationBackend.update({
+          where: { id },
+          data: updateData,
+        });
+
+        logger.info(`Updated notification backend: ${updated.name}`, {
+          backendId: id,
+          adminId: req.user?.sub,
+        });
+
+        // Return with masked values
+        return NextResponse.json({
+          success: true,
+          backend: {
+            ...updated,
+            config: notificationService.maskConfig(updated.type as NotificationBackendType, updated.config),
+          },
+        });
+      } catch (error) {
+        logger.error('Failed to update notification backend', {
+          error: error instanceof Error ? error.message : String(error),
+        });
+
+        if (error instanceof z.ZodError) {
+          return NextResponse.json(
+            {
+              error: 'ValidationError',
+              details: error.errors,
+            },
+            { status: 400 }
+          );
+        }
+
+        return NextResponse.json(
+          {
+            error: 'UpdateError',
+            message: 'Failed to update notification backend',
+          },
+          { status: 500 }
+        );
+      }
+    });
+  });
+}
+
+/**
+ * DELETE /api/admin/notifications/[id]
+ * Delete notification backend
+ */
+export async function DELETE(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  return requireAuth(request, async (req: AuthenticatedRequest) => {
+    return requireAdmin(req, async () => {
+      try {
+        const { id } = await params;
+
+        // Check if backend exists
+        const backend = await prisma.notificationBackend.findUnique({
+          where: { id },
+        });
+
+        if (!backend) {
+          return NextResponse.json(
+            { error: 'NotFound', message: 'Notification backend not found' },
+            { status: 404 }
+          );
+        }
+
+        // Delete backend
+        await prisma.notificationBackend.delete({
+          where: { id },
+        });
+
+        logger.info(`Deleted notification backend: ${backend.name}`, {
+          backendId: id,
+          adminId: req.user?.sub,
+        });
+
+        return NextResponse.json({
+          success: true,
+          message: 'Notification backend deleted',
+        });
+      } catch (error) {
+        logger.error('Failed to delete notification backend', {
+          error: error instanceof Error ? error.message : String(error),
+        });
+
+        return NextResponse.json(
+          {
+            error: 'DeleteError',
+            message: 'Failed to delete notification backend',
+          },
+          { status: 500 }
+        );
+      }
+    });
+  });
+}
diff --git a/src/app/api/admin/notifications/route.ts b/src/app/api/admin/notifications/route.ts
new file mode 100644
index 0000000..d53a150
--- /dev/null
+++ b/src/app/api/admin/notifications/route.ts
@@ -0,0 +1,129 @@
+/**
+ * Component: Notification Backend API
+ * Documentation: documentation/backend/services/notifications.md
+ */
+
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAuth, requireAdmin, AuthenticatedRequest } from '@/lib/middleware/auth';
+import { prisma } from '@/lib/db';
+import { getNotificationService, NotificationBackendType } from '@/lib/services/notification.service';
+import { RMABLogger } from '@/lib/utils/logger';
+import { z } from 'zod';
+
+const logger = RMABLogger.create('API.Admin.Notifications');
+
+const CreateBackendSchema = z.object({
+  type: z.enum(['discord', 'pushover', 'email', 'slack', 'telegram', 'webhook']),
+  name: z.string().min(1),
+  config: z.record(z.any()),
+  events: z.array(z.enum(['request_pending_approval', 'request_approved', 'request_available', 'request_error'])).min(1),
+  enabled: z.boolean().default(true),
+});
+
+/**
+ * GET /api/admin/notifications
+ * List all notification backends (sensitive values masked)
+ */
+export async function GET(request: NextRequest) {
+  return requireAuth(request, async (req: AuthenticatedRequest) => {
+    return requireAdmin(req, async () => {
+      try {
+        const backends = await prisma.notificationBackend.findMany({
+          orderBy: { createdAt: 'desc' },
+        });
+
+        const notificationService = getNotificationService();
+
+        // Mask sensitive config values
+        const maskedBackends = backends.map((backend) => ({
+          ...backend,
+          config: notificationService.maskConfig(backend.type as NotificationBackendType, backend.config),
+        }));
+
+        return NextResponse.json({
+          success: true,
+          backends: maskedBackends,
+        });
+      } catch (error) {
+        logger.error('Failed to fetch notification backends', {
+          error: error instanceof Error ? error.message : String(error),
+        });
+
+        return NextResponse.json(
+          {
+            error: 'FetchError',
+            message: 'Failed to fetch notification backends',
+          },
+          { status: 500 }
+        );
+      }
+    });
+  });
+}
+
+/**
+ * POST /api/admin/notifications
+ * Create new notification backend
+ */
+export async function POST(request: NextRequest) {
+  return requireAuth(request, async (req: AuthenticatedRequest) => {
+    return requireAdmin(req, async () => {
+      try {
+        const body = await request.json();
+        const { type, name, config, events, enabled } = CreateBackendSchema.parse(body);
+
+        const notificationService = getNotificationService();
+
+        // Encrypt sensitive config values
+        const encryptedConfig = notificationService.encryptConfig(type, config);
+
+        // Create backend
+        const backend = await prisma.notificationBackend.create({
+          data: {
+            type,
+            name,
+            config: encryptedConfig,
+            events,
+            enabled,
+          },
+        });
+
+        logger.info(`Created notification backend: ${name} (${type})`, {
+          backendId: backend.id,
+          adminId: req.user?.sub,
+        });
+
+        // Return with masked values
+        return NextResponse.json({
+          success: true,
+          backend: {
+            ...backend,
+            config: notificationService.maskConfig(type, backend.config),
+          },
+        }, { status: 201 });
+      } catch (error) {
+        logger.error('Failed to create notification backend', {
+          error: error instanceof Error ? error.message : String(error),
+        });
+
+        if (error instanceof z.ZodError) {
+          return NextResponse.json(
+            {
+              error: 'ValidationError',
+              details: error.errors,
+            },
+            { status: 400 }
+          );
+        }
+
+        return NextResponse.json(
+          {
+            error: 'CreateError',
+            message: 'Failed to create notification backend',
+          },
+          { status: 500 }
+        );
+      }
+    });
+  });
+}
diff --git a/src/app/api/admin/notifications/test/route.ts b/src/app/api/admin/notifications/test/route.ts
new file mode 100644
index 0000000..1ca2c7b
--- /dev/null
+++ b/src/app/api/admin/notifications/test/route.ts
@@ -0,0 +1,97 @@
+/**
+ * Component: Notification Test API
+ * Documentation: documentation/backend/services/notifications.md
+ */
+
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAuth, requireAdmin, AuthenticatedRequest } from '@/lib/middleware/auth';
+import { getNotificationService, NotificationBackendType, NotificationPayload } from '@/lib/services/notification.service';
+import { RMABLogger } from '@/lib/utils/logger';
+import { z } from 'zod';
+
+const logger = RMABLogger.create('API.Admin.Notifications.Test');
+
+const TestNotificationSchema = z.object({
+  type: z.enum(['discord', 'pushover', 'email', 'slack', 'telegram', 'webhook']),
+  config: z.record(z.any()),
+});
+
+/**
+ * POST /api/admin/notifications/test
+ * Test notification with provided config (synchronous)
+ */
+export async function POST(request: NextRequest) {
+  return requireAuth(request, async (req: AuthenticatedRequest) => {
+    return requireAdmin(req, async () => {
+      try {
+        const body = await request.json();
+        const { type, config } = TestNotificationSchema.parse(body);
+
+        const notificationService = getNotificationService();
+
+        // Encrypt config values
+        const encryptedConfig = notificationService.encryptConfig(type, config);
+
+        // Create test payload
+        const testPayload: NotificationPayload = {
+          event: 'request_available',
+          requestId: 'test-request-id',
+          title: "The Hitchhiker's Guide to the Galaxy",
+          author: 'Douglas Adams',
+          userName: 'Test User',
+          timestamp: new Date(),
+        };
+
+        // Send test notification synchronously (not via job queue)
+        try {
+          // Call sendToBackend directly
+          await (notificationService as any).sendToBackend(type, encryptedConfig, testPayload);
+
+          logger.info(`Test notification sent successfully for ${type}`, {
+            adminId: req.user?.sub,
+          });
+
+          return NextResponse.json({
+            success: true,
+            message: 'Test notification sent successfully',
+          });
+        } catch (notificationError) {
+          logger.error(`Test notification failed for ${type}`, {
+            error: notificationError instanceof Error ? notificationError.message : String(notificationError),
+            adminId: req.user?.sub,
+          });
+
+          return NextResponse.json(
+            {
+              error: 'NotificationError',
+              message: notificationError instanceof Error ? notificationError.message : 'Failed to send test notification',
+            },
+            { status: 400 }
+          );
+        }
+      } catch (error) {
+        logger.error('Failed to test notification', {
+          error: error instanceof Error ? error.message : String(error),
+        });
+
+        if (error instanceof z.ZodError) {
+          return NextResponse.json(
+            {
+              error: 'ValidationError',
+              details: error.errors,
+            },
+            { status: 400 }
+          );
+        }
+
+        return NextResponse.json(
+          {
+            error: 'TestError',
+            message: 'Failed to test notification',
+          },
+          { status: 500 }
+        );
+      }
+    });
+  });
+}
diff --git a/src/app/api/admin/requests/[id]/approve/route.ts b/src/app/api/admin/requests/[id]/approve/route.ts
index 4b8473e..f7eea6a 100644
--- a/src/app/api/admin/requests/[id]/approve/route.ts
+++ b/src/app/api/admin/requests/[id]/approve/route.ts
@@ -75,42 +75,123 @@ export async function POST(
 
         // Update request based on action
         if (action === 'approve') {
-          // Approve: Change status to 'pending' and trigger search job
-          const updatedRequest = await prisma.request.update({
-            where: { id },
-            data: { status: 'pending' },
-            include: {
-              audiobook: true,
-              user: {
-                select: {
-                  id: true,
-                  plexUsername: true,
+          const jobQueue = getJobQueueService();
+
+          // Check if request has a pre-selected torrent (from interactive search)
+          if (existingRequest.selectedTorrent) {
+            // User pre-selected a specific torrent - download that torrent directly
+            logger.info(`Request ${id} has pre-selected torrent, starting download`, {
+              requestId: id,
+              userId: existingRequest.userId,
+              adminId: req.user.sub,
+            });
+
+            // Trigger download job with pre-selected torrent
+            await jobQueue.addDownloadJob(
+              existingRequest.id,
+              {
+                id: existingRequest.audiobook.id,
+                title: existingRequest.audiobook.title,
+                author: existingRequest.audiobook.author,
+              },
+              existingRequest.selectedTorrent as any
+            );
+
+            // Update status to 'downloading' and clear selectedTorrent
+            const updatedRequest = await prisma.request.update({
+              where: { id },
+              data: {
+                status: 'downloading',
+                selectedTorrent: null as any, // Clear after use
+              },
+              include: {
+                audiobook: true,
+                user: {
+                  select: {
+                    id: true,
+                    plexUsername: true,
+                  },
                 },
               },
-            },
-          });
+            });
 
-          // Trigger search job
-          const jobQueue = getJobQueueService();
-          await jobQueue.addSearchJob(updatedRequest.id, {
-            id: updatedRequest.audiobook.id,
-            title: updatedRequest.audiobook.title,
-            author: updatedRequest.audiobook.author,
-            asin: updatedRequest.audiobook.audibleAsin || undefined,
-          });
+            // Send notification for manual approval
+            await jobQueue.addNotificationJob(
+              'request_approved',
+              updatedRequest.id,
+              existingRequest.audiobook.title,
+              existingRequest.audiobook.author,
+              existingRequest.user.plexUsername || 'Unknown User'
+            ).catch((error) => {
+              logger.error('Failed to queue notification', { error: error instanceof Error ? error.message : String(error) });
+            });
 
-          logger.info(`Request ${id} approved by admin ${req.user.sub}`, {
-            requestId: id,
-            userId: updatedRequest.userId,
-            audiobookTitle: updatedRequest.audiobook.title,
-            adminId: req.user.sub,
-          });
+            logger.info(`Request ${id} approved by admin ${req.user.sub}, downloading pre-selected torrent`, {
+              requestId: id,
+              userId: updatedRequest.userId,
+              audiobookTitle: existingRequest.audiobook.title,
+              adminId: req.user.sub,
+            });
 
-          return NextResponse.json({
-            success: true,
-            message: 'Request approved and search job triggered',
-            request: updatedRequest,
-          });
+            return NextResponse.json({
+              success: true,
+              message: 'Request approved and download started with pre-selected torrent',
+              request: updatedRequest,
+            });
+          } else {
+            // No pre-selected torrent - use automatic search
+            logger.info(`Request ${id} using automatic search`, {
+              requestId: id,
+              userId: existingRequest.userId,
+              adminId: req.user.sub,
+            });
+
+            const updatedRequest = await prisma.request.update({
+              where: { id },
+              data: { status: 'pending' },
+              include: {
+                audiobook: true,
+                user: {
+                  select: {
+                    id: true,
+                    plexUsername: true,
+                  },
+                },
+              },
+            });
+
+            // Trigger search job
+            await jobQueue.addSearchJob(updatedRequest.id, {
+              id: updatedRequest.audiobook.id,
+              title: updatedRequest.audiobook.title,
+              author: updatedRequest.audiobook.author,
+              asin: updatedRequest.audiobook.audibleAsin || undefined,
+            });
+
+            // Send notification for manual approval
+            await jobQueue.addNotificationJob(
+              'request_approved',
+              updatedRequest.id,
+              updatedRequest.audiobook.title,
+              updatedRequest.audiobook.author,
+              updatedRequest.user.plexUsername || 'Unknown User'
+            ).catch((error) => {
+              logger.error('Failed to queue notification', { error: error instanceof Error ? error.message : String(error) });
+            });
+
+            logger.info(`Request ${id} approved by admin ${req.user.sub}`, {
+              requestId: id,
+              userId: updatedRequest.userId,
+              audiobookTitle: updatedRequest.audiobook.title,
+              adminId: req.user.sub,
+            });
+
+            return NextResponse.json({
+              success: true,
+              message: 'Request approved and search job triggered',
+              request: updatedRequest,
+            });
+          }
         } else {
           // Deny: Change status to 'denied'
           const updatedRequest = await prisma.request.update({
diff --git a/src/app/api/audiobooks/request-with-torrent/route.ts b/src/app/api/audiobooks/request-with-torrent/route.ts
index 3706176..3aa6426 100644
--- a/src/app/api/audiobooks/request-with-torrent/route.ts
+++ b/src/app/api/audiobooks/request-with-torrent/route.ts
@@ -193,43 +193,141 @@ export async function POST(request: NextRequest) {
         });
       }
 
-      // Create request with downloading status
-      const newRequest = await prisma.request.create({
-        data: {
-          userId: req.user.id,
-          audiobookId: audiobookRecord.id,
-          status: 'downloading',
-          progress: 0,
-        },
-        include: {
-          audiobook: true,
-          user: {
-            select: {
-              id: true,
-              plexUsername: true,
-            },
-          },
+      // Check if request needs approval
+      let needsApproval = false;
+
+      // Fetch user with autoApproveRequests setting
+      const user = await prisma.user.findUnique({
+        where: { id: req.user.id },
+        select: {
+          role: true,
+          autoApproveRequests: true,
+          plexUsername: true,
         },
       });
 
-      // Queue download job with the selected torrent
+      if (!user) {
+        return NextResponse.json(
+          { error: 'UserNotFound', message: 'User not found' },
+          { status: 404 }
+        );
+      }
+
+      // Determine if approval is needed
+      if (user.role === 'admin') {
+        // Admins always auto-approve
+        needsApproval = false;
+      } else {
+        // Check user's personal setting first
+        if (user.autoApproveRequests === true) {
+          needsApproval = false;
+        } else if (user.autoApproveRequests === false) {
+          needsApproval = true;
+        } else {
+          // User setting is null, check global setting
+          const globalConfig = await prisma.configuration.findUnique({
+            where: { key: 'auto_approve_requests' },
+          });
+          // Default to true if not configured (backward compatibility)
+          const globalAutoApprove = globalConfig === null ? true : globalConfig.value === 'true';
+          needsApproval = !globalAutoApprove;
+        }
+      }
+
       const jobQueue = getJobQueueService();
-      await jobQueue.addDownloadJob(
-        newRequest.id,
-        {
-          id: audiobookRecord.id,
-          title: audiobookRecord.title,
-          author: audiobookRecord.author,
-        },
-        torrent
-      );
 
-      logger.info(`Queued download monitor job for request ${newRequest.id}`);
+      if (needsApproval) {
+        // Create request with awaiting_approval status and store selected torrent
+        logger.info('Request requires approval, storing selected torrent', { userId: req.user.id });
 
-      return NextResponse.json({
-        success: true,
-        request: newRequest,
-      }, { status: 201 });
+        const newRequest = await prisma.request.create({
+          data: {
+            userId: req.user.id,
+            audiobookId: audiobookRecord.id,
+            status: 'awaiting_approval',
+            progress: 0,
+            selectedTorrent: torrent as any, // Store the selected torrent for later
+          },
+          include: {
+            audiobook: true,
+            user: {
+              select: {
+                id: true,
+                plexUsername: true,
+              },
+            },
+          },
+        });
+
+        // Send pending approval notification
+        await jobQueue.addNotificationJob(
+          'request_pending_approval',
+          newRequest.id,
+          audiobookRecord.title,
+          audiobookRecord.author,
+          user.plexUsername || 'Unknown User'
+        ).catch((error) => {
+          logger.error('Failed to queue notification', { error: error instanceof Error ? error.message : String(error) });
+        });
+
+        logger.info(`Request ${newRequest.id} created, awaiting admin approval`);
+
+        return NextResponse.json({
+          success: true,
+          request: newRequest,
+          message: 'Request submitted for admin approval',
+        }, { status: 201 });
+      } else {
+        // Auto-approved - create request with downloading status and start download
+        logger.info('Request auto-approved, starting download', { userId: req.user.id });
+
+        const newRequest = await prisma.request.create({
+          data: {
+            userId: req.user.id,
+            audiobookId: audiobookRecord.id,
+            status: 'downloading',
+            progress: 0,
+          },
+          include: {
+            audiobook: true,
+            user: {
+              select: {
+                id: true,
+                plexUsername: true,
+              },
+            },
+          },
+        });
+
+        // Queue download job with the selected torrent
+        await jobQueue.addDownloadJob(
+          newRequest.id,
+          {
+            id: audiobookRecord.id,
+            title: audiobookRecord.title,
+            author: audiobookRecord.author,
+          },
+          torrent
+        );
+
+        // Send approved notification
+        await jobQueue.addNotificationJob(
+          'request_approved',
+          newRequest.id,
+          audiobookRecord.title,
+          audiobookRecord.author,
+          user.plexUsername || 'Unknown User'
+        ).catch((error) => {
+          logger.error('Failed to queue notification', { error: error instanceof Error ? error.message : String(error) });
+        });
+
+        logger.info(`Request ${newRequest.id} auto-approved and download queued`);
+
+        return NextResponse.json({
+          success: true,
+          request: newRequest,
+        }, { status: 201 });
+      }
     } catch (error) {
       logger.error('Failed to create request with torrent', { error: error instanceof Error ? error.message : String(error) });
 
diff --git a/src/app/api/bookdate/swipe/route.ts b/src/app/api/bookdate/swipe/route.ts
index 3477f68..2f0bfbb 100644
--- a/src/app/api/bookdate/swipe/route.ts
+++ b/src/app/api/bookdate/swipe/route.ts
@@ -122,28 +122,97 @@ async function handler(req: AuthenticatedRequest) {
         });
 
         if (!existingRequest) {
+          // Check if request needs approval (same logic as POST /api/requests)
+          let needsApproval = false;
+
+          // Fetch user with autoApproveRequests setting
+          const user = await prisma.user.findUnique({
+            where: { id: userId },
+            select: {
+              role: true,
+              autoApproveRequests: true,
+              plexUsername: true,
+            },
+          });
+
+          if (!user) {
+            logger.error('User not found during request creation');
+            throw new Error('User not found');
+          }
+
+          // Determine if approval is needed
+          if (user.role === 'admin') {
+            // Admins always auto-approve
+            needsApproval = false;
+          } else {
+            // Check user's personal setting first
+            if (user.autoApproveRequests === true) {
+              needsApproval = false;
+            } else if (user.autoApproveRequests === false) {
+              needsApproval = true;
+            } else {
+              // User setting is null, check global setting
+              const globalConfig = await prisma.configuration.findUnique({
+                where: { key: 'auto_approve_requests' },
+              });
+              // Default to true if not configured (backward compatibility)
+              const globalAutoApprove = globalConfig === null ? true : globalConfig.value === 'true';
+              needsApproval = !globalAutoApprove;
+            }
+          }
+
+          // Determine initial status
+          const initialStatus = needsApproval ? 'awaiting_approval' : 'pending';
+
           const newRequest = await prisma.request.create({
             data: {
               userId,
               audiobookId: audiobook.id,
-              status: 'pending',
+              status: initialStatus,
               priority: 0,
             },
           });
 
-          logger.info(`Created request for "${recommendation.title}"`);
+          logger.info(`Created request for "${recommendation.title}" with status: ${initialStatus}`);
 
-          // Trigger search job (same as regular request creation)
+          // Import job queue service
           const { getJobQueueService } = await import('@/lib/services/job-queue.service');
           const jobQueue = getJobQueueService();
-          await jobQueue.addSearchJob(newRequest.id, {
-            id: audiobook.id,
-            title: audiobook.title,
-            author: audiobook.author,
-            asin: audiobook.audibleAsin || undefined,
-          });
 
-          logger.info(`Triggered search job for request ${newRequest.id}`);
+          // Send notification based on approval status
+          if (needsApproval) {
+            // Request needs approval - send pending notification
+            await jobQueue.addNotificationJob(
+              'request_pending_approval',
+              newRequest.id,
+              audiobook.title,
+              audiobook.author,
+              user.plexUsername || 'Unknown User'
+            ).catch((error) => {
+              logger.error('Failed to queue notification', { error: error instanceof Error ? error.message : String(error) });
+            });
+          } else {
+            // Request was auto-approved - send approved notification
+            await jobQueue.addNotificationJob(
+              'request_approved',
+              newRequest.id,
+              audiobook.title,
+              audiobook.author,
+              user.plexUsername || 'Unknown User'
+            ).catch((error) => {
+              logger.error('Failed to queue notification', { error: error instanceof Error ? error.message : String(error) });
+            });
+
+            // Trigger search job only if auto-approved
+            await jobQueue.addSearchJob(newRequest.id, {
+              id: audiobook.id,
+              title: audiobook.title,
+              author: audiobook.author,
+              asin: audiobook.audibleAsin || undefined,
+            });
+
+            logger.info(`Triggered search job for request ${newRequest.id}`);
+          }
         }
 
       } catch (error) {
diff --git a/src/app/api/requests/[id]/interactive-search/route.ts b/src/app/api/requests/[id]/interactive-search/route.ts
index b3bf8b3..011f1b1 100644
--- a/src/app/api/requests/[id]/interactive-search/route.ts
+++ b/src/app/api/requests/[id]/interactive-search/route.ts
@@ -63,6 +63,14 @@ export async function POST(
         );
       }
 
+      // Check if request is awaiting approval
+      if (requestRecord.status === 'awaiting_approval') {
+        return NextResponse.json(
+          { error: 'AwaitingApproval', message: 'This request is awaiting admin approval. You cannot search for torrents until it is approved.' },
+          { status: 403 }
+        );
+      }
+
       // Get enabled indexers from configuration
       const { getConfigService } = await import('@/lib/services/config.service');
       const configService = getConfigService();
diff --git a/src/app/api/requests/[id]/select-torrent/route.ts b/src/app/api/requests/[id]/select-torrent/route.ts
index e759493..e205716 100644
--- a/src/app/api/requests/[id]/select-torrent/route.ts
+++ b/src/app/api/requests/[id]/select-torrent/route.ts
@@ -62,10 +62,96 @@ export async function POST(
         );
       }
 
+      // Check if request is awaiting approval
+      if (requestRecord.status === 'awaiting_approval') {
+        return NextResponse.json(
+          { error: 'AwaitingApproval', message: 'This request is awaiting admin approval. You cannot download torrents until it is approved.' },
+          { status: 403 }
+        );
+      }
+
+      // Re-check if approval is needed based on CURRENT settings (security: settings may have changed)
+      const user = await prisma.user.findUnique({
+        where: { id: req.user.id },
+        select: {
+          role: true,
+          autoApproveRequests: true,
+          plexUsername: true,
+        },
+      });
+
+      if (!user) {
+        return NextResponse.json(
+          { error: 'UserNotFound', message: 'User not found' },
+          { status: 404 }
+        );
+      }
+
+      let needsApproval = false;
+
+      // Determine if approval is needed (same logic as request creation)
+      if (user.role === 'admin') {
+        // Admins always auto-approve
+        needsApproval = false;
+      } else {
+        // Check user's personal setting first
+        if (user.autoApproveRequests === true) {
+          needsApproval = false;
+        } else if (user.autoApproveRequests === false) {
+          needsApproval = true;
+        } else {
+          // User setting is null, check global setting
+          const globalConfig = await prisma.configuration.findUnique({
+            where: { key: 'auto_approve_requests' },
+          });
+          // Default to true if not configured (backward compatibility)
+          const globalAutoApprove = globalConfig === null ? true : globalConfig.value === 'true';
+          needsApproval = !globalAutoApprove;
+        }
+      }
+
+      const jobQueue = getJobQueueService();
+
+      // If approval is now needed, store torrent and wait for approval
+      if (needsApproval) {
+        logger.info(`Torrent selection requires approval`, { requestId: id, userId: req.user.id });
+
+        const updated = await prisma.request.update({
+          where: { id },
+          data: {
+            status: 'awaiting_approval',
+            selectedTorrent: torrent as any, // Store the selected torrent
+            updatedAt: new Date(),
+          },
+          include: {
+            audiobook: true,
+          },
+        });
+
+        // Send pending approval notification
+        await jobQueue.addNotificationJob(
+          'request_pending_approval',
+          updated.id,
+          requestRecord.audiobook.title,
+          requestRecord.audiobook.author,
+          user.plexUsername || 'Unknown User'
+        ).catch((error) => {
+          logger.error('Failed to queue notification', { error: error instanceof Error ? error.message : String(error) });
+        });
+
+        logger.info(`Request ${id} stored selected torrent and awaits admin approval`);
+
+        return NextResponse.json({
+          success: true,
+          request: updated,
+          message: 'Request submitted for admin approval',
+        });
+      }
+
+      // Auto-approved - start download immediately
       logger.info(`User selected torrent: ${torrent.title}`, { requestId: id });
 
       // Trigger download job with the selected torrent
-      const jobQueue = getJobQueueService();
       await jobQueue.addDownloadJob(
         id,
         {
@@ -76,6 +162,17 @@ export async function POST(
         torrent
       );
 
+      // Send approved notification (user has now committed to downloading)
+      await jobQueue.addNotificationJob(
+        'request_approved',
+        id,
+        requestRecord.audiobook.title,
+        requestRecord.audiobook.author,
+        user.plexUsername || 'Unknown User'
+      ).catch((error) => {
+        logger.error('Failed to queue notification', { error: error instanceof Error ? error.message : String(error) });
+      });
+
       // Update request status
       const updated = await prisma.request.update({
         where: { id },
diff --git a/src/app/api/requests/route.ts b/src/app/api/requests/route.ts
index 61b5811..2d876f0 100644
--- a/src/app/api/requests/route.ts
+++ b/src/app/api/requests/route.ts
@@ -252,9 +252,35 @@ export async function POST(request: NextRequest) {
         },
       });
 
+      const jobQueue = getJobQueueService();
+
+      // Send notification based on approval status
+      if (initialStatus === 'awaiting_approval') {
+        // Request needs approval - send pending notification
+        await jobQueue.addNotificationJob(
+          'request_pending_approval',
+          newRequest.id,
+          audiobookRecord.title,
+          audiobookRecord.author,
+          newRequest.user.plexUsername || 'Unknown User'
+        ).catch((error) => {
+          logger.error('Failed to queue notification', { error: error instanceof Error ? error.message : String(error) });
+        });
+      } else {
+        // Request was auto-approved (either automatic or interactive search) - send approved notification
+        await jobQueue.addNotificationJob(
+          'request_approved',
+          newRequest.id,
+          audiobookRecord.title,
+          audiobookRecord.author,
+          newRequest.user.plexUsername || 'Unknown User'
+        ).catch((error) => {
+          logger.error('Failed to queue notification', { error: error instanceof Error ? error.message : String(error) });
+        });
+      }
+
       // Trigger search job only if not skipped and not awaiting approval
       if (shouldTriggerSearch) {
-        const jobQueue = getJobQueueService();
         await jobQueue.addSearchJob(newRequest.id, {
           id: audiobookRecord.id,
           title: audiobookRecord.title,
diff --git a/src/lib/integrations/qbittorrent.service.ts b/src/lib/integrations/qbittorrent.service.ts
index 3424031..eaee5d0 100644
--- a/src/lib/integrations/qbittorrent.service.ts
+++ b/src/lib/integrations/qbittorrent.service.ts
@@ -8,6 +8,7 @@ import https from 'https';
 import * as parseTorrentModule from 'parse-torrent';
 import FormData from 'form-data';
 import { RMABLogger } from '../utils/logger';
+import { PathMapper, PathMappingConfig } from '../utils/path-mapper';
 
 // Handle both ESM and CommonJS imports
 const parseTorrent = (parseTorrentModule as any).default || parseTorrentModule;
@@ -87,6 +88,7 @@ export class QBittorrentService {
   private defaultCategory: string;
   private disableSSLVerify: boolean;
   private httpsAgent?: https.Agent;
+  private pathMappingConfig: PathMappingConfig;
 
   constructor(
     baseUrl: string,
@@ -94,7 +96,8 @@ export class QBittorrentService {
     password: string,
     defaultSavePath: string = '/downloads',
     defaultCategory: string = 'readmeabook',
-    disableSSLVerify: boolean = false
+    disableSSLVerify: boolean = false,
+    pathMappingConfig?: PathMappingConfig
   ) {
     this.baseUrl = baseUrl.replace(/\/$/, '');
     this.username = username;
@@ -102,6 +105,7 @@ export class QBittorrentService {
     this.defaultSavePath = defaultSavePath;
     this.defaultCategory = defaultCategory;
     this.disableSSLVerify = disableSSLVerify;
+    this.pathMappingConfig = pathMappingConfig || { enabled: false, remotePath: '', localPath: '' };
 
     // Create HTTPS agent if SSL verification is disabled
     if (disableSSLVerify && this.baseUrl.startsWith('https')) {
@@ -270,10 +274,14 @@ export class QBittorrentService {
       // Torrent doesn't exist, continue with adding
     }
 
+    // Apply reverse path mapping (local → remote) to savepath
+    const localSavePath = options?.savePath || this.defaultSavePath;
+    const remoteSavePath = PathMapper.reverseTransform(localSavePath, this.pathMappingConfig);
+
     // Upload via 'urls' parameter
     const form = new URLSearchParams({
       urls: magnetUrl,
-      savepath: options?.savePath || this.defaultSavePath,
+      savepath: remoteSavePath,
       category,
       paused: options?.paused ? 'true' : 'false',
       sequentialDownload: (options?.sequentialDownload !== false).toString(),
@@ -408,6 +416,10 @@ export class QBittorrentService {
       // Torrent doesn't exist, continue with adding
     }
 
+    // Apply reverse path mapping (local → remote) to savepath
+    const localSavePath = options?.savePath || this.defaultSavePath;
+    const remoteSavePath = PathMapper.reverseTransform(localSavePath, this.pathMappingConfig);
+
     // Upload .torrent file content via multipart/form-data
     const formData = new FormData();
 
@@ -416,7 +428,7 @@ export class QBittorrentService {
       filename,
       contentType: 'application/x-bittorrent',
     });
-    formData.append('savepath', options?.savePath || this.defaultSavePath);
+    formData.append('savepath', remoteSavePath);
     formData.append('category', category);
     formData.append('paused', options?.paused ? 'true' : 'false');
     formData.append('sequentialDownload', (options?.sequentialDownload !== false).toString());
@@ -996,6 +1008,9 @@ export async function getQBittorrentService(): Promise<QBittorrentService> {
         'download_client_password',
         'download_dir',
         'download_client_disable_ssl_verify',
+        'download_client_remote_path_mapping_enabled',
+        'download_client_remote_path',
+        'download_client_local_path',
       ]);
 
       logger.info('[QBittorrent] Config loaded:', {
@@ -1004,6 +1019,7 @@ export async function getQBittorrentService(): Promise<QBittorrentService> {
         hasPassword: !!config.download_client_password,
         hasPath: !!config.download_dir,
         disableSSLVerify: config.download_client_disable_ssl_verify === 'true',
+        pathMappingEnabled: config.download_client_remote_path_mapping_enabled === 'true',
       });
 
       // Validate all required fields are present (no env var fallback)
@@ -1035,6 +1051,13 @@ export async function getQBittorrentService(): Promise<QBittorrentService> {
       const savePath = config.download_dir as string;
       const disableSSLVerify = config.download_client_disable_ssl_verify === 'true';
 
+      // Path mapping configuration
+      const pathMappingConfig: PathMappingConfig = {
+        enabled: config.download_client_remote_path_mapping_enabled === 'true',
+        remotePath: config.download_client_remote_path || '',
+        localPath: config.download_client_local_path || '',
+      };
+
       logger.info('[QBittorrent] Creating service instance...');
       qbittorrentService = new QBittorrentService(
         url,
@@ -1042,7 +1065,8 @@ export async function getQBittorrentService(): Promise<QBittorrentService> {
         password,
         savePath,
         'readmeabook',
-        disableSSLVerify
+        disableSSLVerify,
+        pathMappingConfig
       );
 
       // Test connection
diff --git a/src/lib/processors/monitor-download.processor.ts b/src/lib/processors/monitor-download.processor.ts
index b697a5b..b687d83 100644
--- a/src/lib/processors/monitor-download.processor.ts
+++ b/src/lib/processors/monitor-download.processor.ts
@@ -196,12 +196,14 @@ export async function processMonitorDownload(payload: MonitorDownloadPayload): P
     } else if (progress.state === 'failed') {
       logger.error(`Download failed for request ${requestId}`);
 
+      const errorMessage = 'Download failed in qBittorrent';
+
       // Update request to failed
       await prisma.request.update({
         where: { id: requestId },
         data: {
           status: 'failed',
-          errorMessage: 'Download failed in qBittorrent',
+          errorMessage,
           updatedAt: new Date(),
         },
       });
@@ -211,10 +213,33 @@ export async function processMonitorDownload(payload: MonitorDownloadPayload): P
         where: { id: downloadHistoryId },
         data: {
           downloadStatus: 'failed',
-          downloadError: 'Download failed in qBittorrent',
+          downloadError: errorMessage,
         },
       });
 
+      // Send notification for request failure
+      const request = await prisma.request.findUnique({
+        where: { id: requestId },
+        include: {
+          audiobook: true,
+          user: { select: { plexUsername: true } },
+        },
+      });
+
+      if (request) {
+        const jobQueue = getJobQueueService();
+        await jobQueue.addNotificationJob(
+          'request_error',
+          request.id,
+          request.audiobook.title,
+          request.audiobook.author,
+          request.user.plexUsername || 'Unknown User',
+          errorMessage
+        ).catch((error) => {
+          logger.error('Failed to queue notification', { error: error instanceof Error ? error.message : String(error) });
+        });
+      }
+
       return {
         success: false,
         completed: true,
@@ -266,14 +291,38 @@ export async function processMonitorDownload(payload: MonitorDownloadPayload): P
       logger.warn(`Transient error for request ${requestId}, allowing Bull to retry`);
     } else {
       // Permanent error - mark request as failed immediately
+      const failureMessage = errorMessage || 'Monitor download failed';
       await prisma.request.update({
         where: { id: requestId },
         data: {
           status: 'failed',
-          errorMessage: errorMessage || 'Monitor download failed',
+          errorMessage: failureMessage,
           updatedAt: new Date(),
         },
       });
+
+      // Send notification for request failure
+      const request = await prisma.request.findUnique({
+        where: { id: requestId },
+        include: {
+          audiobook: true,
+          user: { select: { plexUsername: true } },
+        },
+      });
+
+      if (request) {
+        const jobQueue = getJobQueueService();
+        await jobQueue.addNotificationJob(
+          'request_error',
+          request.id,
+          request.audiobook.title,
+          request.audiobook.author,
+          request.user.plexUsername || 'Unknown User',
+          failureMessage
+        ).catch((error) => {
+          logger.error('Failed to queue notification', { error: error instanceof Error ? error.message : String(error) });
+        });
+      }
     }
 
     // Rethrow to trigger Bull's retry mechanism
diff --git a/src/lib/processors/organize-files.processor.ts b/src/lib/processors/organize-files.processor.ts
index f553050..1cfd640 100644
--- a/src/lib/processors/organize-files.processor.ts
+++ b/src/lib/processors/organize-files.processor.ts
@@ -253,16 +253,41 @@ export async function processOrganizeFiles(payload: OrganizeFilesPayload): Promi
         // Max retries exceeded - move to warn status
         logger.warn(`Max retries (${currentRequest.maxImportRetries}) exceeded for request ${requestId}, moving to warn status`);
 
+        const warnMessage = `${errorMessage}. Max retries (${currentRequest.maxImportRetries}) exceeded. Manual retry available.`;
+
         await prisma.request.update({
           where: { id: requestId },
           data: {
             status: 'warn',
             importAttempts: newAttempts,
-            errorMessage: `${errorMessage}. Max retries (${currentRequest.maxImportRetries}) exceeded. Manual retry available.`,
+            errorMessage: warnMessage,
             updatedAt: new Date(),
           },
         });
 
+        // Send notification for request failure
+        const request = await prisma.request.findUnique({
+          where: { id: requestId },
+          include: {
+            audiobook: true,
+            user: { select: { plexUsername: true } },
+          },
+        });
+
+        if (request) {
+          const jobQueue = getJobQueueService();
+          await jobQueue.addNotificationJob(
+            'request_error',
+            request.id,
+            request.audiobook.title,
+            request.audiobook.author,
+            request.user.plexUsername || 'Unknown User',
+            warnMessage
+          ).catch((error) => {
+            logger.error('Failed to queue notification', { error: error instanceof Error ? error.message : String(error) });
+          });
+        }
+
         return {
           success: false,
           message: 'Max import retries exceeded, manual intervention required',
@@ -282,6 +307,29 @@ export async function processOrganizeFiles(payload: OrganizeFilesPayload): Promi
         },
       });
 
+      // Send notification for request failure
+      const request = await prisma.request.findUnique({
+        where: { id: requestId },
+        include: {
+          audiobook: true,
+          user: { select: { plexUsername: true } },
+        },
+      });
+
+      if (request) {
+        const jobQueue = getJobQueueService();
+        await jobQueue.addNotificationJob(
+          'request_error',
+          request.id,
+          request.audiobook.title,
+          request.audiobook.author,
+          request.user.plexUsername || 'Unknown User',
+          errorMessage
+        ).catch((error) => {
+          logger.error('Failed to queue notification', { error: error instanceof Error ? error.message : String(error) });
+        });
+      }
+
       throw error;
     }
   }
diff --git a/src/lib/processors/plex-recently-added.processor.ts b/src/lib/processors/plex-recently-added.processor.ts
index 75a18e1..ae91dc8 100644
--- a/src/lib/processors/plex-recently-added.processor.ts
+++ b/src/lib/processors/plex-recently-added.processor.ts
@@ -184,7 +184,14 @@ export async function processPlexRecentlyAddedCheck(payload: PlexRecentlyAddedPa
         status: { notIn: ['available', 'cancelled'] },
         deletedAt: null,
       },
-      include: { audiobook: true },
+      include: {
+        audiobook: true,
+        user: {
+          select: {
+            plexUsername: true,
+          },
+        },
+      },
       take: 100,
     });
 
@@ -237,6 +244,19 @@ export async function processPlexRecentlyAddedCheck(payload: PlexRecentlyAddedPa
               },
             });
 
+            // Send notification that audiobook is now available
+            const { getJobQueueService } = await import('../services/job-queue.service');
+            const jobQueue = getJobQueueService();
+            await jobQueue.addNotificationJob(
+              'request_available',
+              request.id,
+              audiobook.title,
+              audiobook.author,
+              request.user.plexUsername || 'Unknown User'
+            ).catch((error) => {
+              logger.error('Failed to queue notification', { error: error instanceof Error ? error.message : String(error) });
+            });
+
             matchedDownloads++;
 
             // Trigger metadata match for Audiobookshelf items (only for our downloaded requests)
diff --git a/src/lib/processors/scan-plex.processor.ts b/src/lib/processors/scan-plex.processor.ts
index 90ab126..87e3682 100644
--- a/src/lib/processors/scan-plex.processor.ts
+++ b/src/lib/processors/scan-plex.processor.ts
@@ -366,7 +366,14 @@ export async function processScanPlex(payload: ScanPlexPayload): Promise<any> {
         status: { notIn: ['available', 'cancelled'] },
         deletedAt: null,
       },
-      include: { audiobook: true },
+      include: {
+        audiobook: true,
+        user: {
+          select: {
+            plexUsername: true,
+          },
+        },
+      },
       take: 100, // Increased from 50 to handle more eligible requests
     });
 
@@ -423,6 +430,19 @@ export async function processScanPlex(payload: ScanPlexPayload): Promise<any> {
             },
           });
 
+          // Send notification that audiobook is now available
+          const { getJobQueueService } = await import('../services/job-queue.service');
+          const jobQueue = getJobQueueService();
+          await jobQueue.addNotificationJob(
+            'request_available',
+            request.id,
+            audiobook.title,
+            audiobook.author,
+            request.user.plexUsername || 'Unknown User'
+          ).catch((error) => {
+            logger.error('Failed to queue notification', { error: error instanceof Error ? error.message : String(error) });
+          });
+
           matchedCount++;
 
           // Trigger metadata match for Audiobookshelf items (only for our downloaded requests)
diff --git a/src/lib/processors/send-notification.processor.ts b/src/lib/processors/send-notification.processor.ts
new file mode 100644
index 0000000..1912114
--- /dev/null
+++ b/src/lib/processors/send-notification.processor.ts
@@ -0,0 +1,55 @@
+/**
+ * Component: Send Notification Job Processor
+ * Documentation: documentation/backend/services/notifications.md
+ *
+ * Processes notification jobs by calling NotificationService to send alerts
+ * to all enabled backends subscribed to the event.
+ */
+
+import { getNotificationService } from '../services/notification.service';
+import { RMABLogger } from '../utils/logger';
+
+export interface SendNotificationPayload {
+  jobId?: string;
+  event: 'request_pending_approval' | 'request_approved' | 'request_available' | 'request_error';
+  requestId: string;
+  title: string;
+  author: string;
+  userName: string;
+  message?: string;
+  timestamp: Date;
+}
+
+/**
+ * Process send notification job
+ * Calls NotificationService to send notifications to all enabled backends
+ */
+export async function processSendNotification(payload: SendNotificationPayload): Promise<void> {
+  const { event, requestId, title, author, userName, message, jobId } = payload;
+
+  const logger = RMABLogger.forJob(jobId, 'SendNotification');
+
+  logger.info(`Processing notification: ${event}`, { requestId });
+
+  try {
+    const notificationService = getNotificationService();
+    await notificationService.sendNotification({
+      event,
+      requestId,
+      title,
+      author,
+      userName,
+      message,
+      timestamp: new Date(),
+    });
+
+    logger.info(`Notification processed: ${event}`, { requestId });
+  } catch (error) {
+    logger.error('Failed to process notification', {
+      event,
+      requestId,
+      error: error instanceof Error ? error.message : String(error),
+    });
+    // Don't throw - non-blocking
+  }
+}
diff --git a/src/lib/services/job-queue.service.ts b/src/lib/services/job-queue.service.ts
index 6c6012d..38356a0 100644
--- a/src/lib/services/job-queue.service.ts
+++ b/src/lib/services/job-queue.service.ts
@@ -24,7 +24,8 @@ export type JobType =
   | 'retry_missing_torrents'
   | 'retry_failed_imports'
   | 'cleanup_seeded_torrents'
-  | 'monitor_rss_feeds';
+  | 'monitor_rss_feeds'
+  | 'send_notification';
 
 export interface JobPayload {
   jobId?: string; // Database job ID (added automatically by addJob)
@@ -102,6 +103,16 @@ export interface CleanupSeededTorrentsPayload extends JobPayload {
   scheduledJobId?: string;
 }
 
+export interface SendNotificationPayload extends JobPayload {
+  event: 'request_pending_approval' | 'request_approved' | 'request_available' | 'request_error';
+  requestId: string;
+  title: string;
+  author: string;
+  userName: string;
+  message?: string;
+  timestamp: Date;
+}
+
 export interface QueueStats {
   waiting: number;
   active: number;
@@ -298,6 +309,12 @@ export class JobQueueService {
       const payloadWithJobId = await this.ensureJobRecord(job, 'cleanup_seeded_torrents');
       return await processCleanupSeededTorrents(payloadWithJobId);
     });
+
+    // Send notification processor
+    this.queue.process('send_notification', 5, async (job: BullJob<SendNotificationPayload>) => {
+      const { processSendNotification } = await import('../processors/send-notification.processor');
+      return await processSendNotification(job.data);
+    });
   }
 
   /**
@@ -790,6 +807,35 @@ export class JobQueueService {
     this.redis.disconnect();
   }
 
+  /**
+   * Add notification job
+   */
+  async addNotificationJob(
+    event: 'request_pending_approval' | 'request_approved' | 'request_available' | 'request_error',
+    requestId: string,
+    title: string,
+    author: string,
+    userName: string,
+    message?: string
+  ): Promise<string> {
+    logger.info(`Queueing notification: ${event}`, { requestId, title, userName });
+    return await this.addJob(
+      'send_notification',
+      {
+        event,
+        requestId,
+        title,
+        author,
+        userName,
+        message,
+        timestamp: new Date(),
+      } as SendNotificationPayload,
+      {
+        priority: 5, // Medium priority
+      }
+    );
+  }
+
   /**
    * Add a repeatable job with cron schedule
    */
diff --git a/src/lib/services/notification.service.ts b/src/lib/services/notification.service.ts
new file mode 100644
index 0000000..da6a848
--- /dev/null
+++ b/src/lib/services/notification.service.ts
@@ -0,0 +1,380 @@
+/**
+ * Component: Notification Service
+ * Documentation: documentation/backend/services/notifications.md
+ */
+
+import { getEncryptionService } from './encryption.service';
+import { RMABLogger } from '../utils/logger';
+import { prisma } from '../db';
+
+const logger = RMABLogger.create('NotificationService');
+
+// Event types
+export type NotificationEvent =
+  | 'request_pending_approval'
+  | 'request_approved'
+  | 'request_available'
+  | 'request_error';
+
+// Backend types
+export type NotificationBackendType =
+  | 'discord'
+  | 'pushover'
+  | 'email'
+  | 'slack'
+  | 'telegram'
+  | 'webhook';
+
+// Config interfaces
+export interface DiscordConfig {
+  webhookUrl: string;
+  username?: string;
+  avatarUrl?: string;
+}
+
+export interface PushoverConfig {
+  userKey: string;
+  appToken: string;
+  device?: string;
+  priority?: number;
+}
+
+export type NotificationConfig = DiscordConfig | PushoverConfig;
+
+// Notification payload
+export interface NotificationPayload {
+  event: NotificationEvent;
+  requestId: string;
+  title: string;
+  author: string;
+  userName: string;
+  message?: string; // For error events
+  timestamp: Date;
+}
+
+// Discord embed colors by event type
+const DISCORD_COLORS = {
+  request_pending_approval: 0xfbbf24, // yellow-400
+  request_approved: 0x22c55e, // green-500
+  request_available: 0x3b82f6, // blue-500
+  request_error: 0xef4444, // red-500
+};
+
+// Discord embed titles
+const DISCORD_TITLES = {
+  request_pending_approval: '📬 New Request Pending Approval',
+  request_approved: '✅ Request Approved',
+  request_available: '🎉 Audiobook Available',
+  request_error: '❌ Request Error',
+};
+
+// Pushover priorities
+const PUSHOVER_PRIORITIES = {
+  request_pending_approval: 0, // Normal
+  request_approved: 0, // Normal
+  request_available: 1, // High
+  request_error: 1, // High
+};
+
+export class NotificationService {
+  private encryptionService = getEncryptionService();
+
+  /**
+   * Send notification to all enabled backends subscribed to the event
+   */
+  async sendNotification(payload: NotificationPayload): Promise<void> {
+    try {
+      // Get all enabled backends subscribed to this event
+      const backends = await prisma.notificationBackend.findMany({
+        where: {
+          enabled: true,
+          events: {
+            array_contains: payload.event,
+          },
+        },
+      });
+
+      if (backends.length === 0) {
+        logger.debug(`No backends subscribed to event: ${payload.event}`);
+        return;
+      }
+
+      logger.info(`Sending notification to ${backends.length} backend(s)`, {
+        event: payload.event,
+        requestId: payload.requestId,
+      });
+
+      // Send to all backends in parallel (atomic per-backend)
+      const results = await Promise.allSettled(
+        backends.map((backend) =>
+          this.sendToBackend(backend.type as NotificationBackendType, backend.config, payload)
+        )
+      );
+
+      // Log results
+      const successful = results.filter((r) => r.status === 'fulfilled').length;
+      const failed = results.filter((r) => r.status === 'rejected').length;
+
+      logger.info(`Notification sent: ${successful} succeeded, ${failed} failed`, {
+        event: payload.event,
+        requestId: payload.requestId,
+      });
+
+      // Log individual failures
+      results.forEach((result, index) => {
+        if (result.status === 'rejected') {
+          logger.error(`Failed to send to backend ${backends[index].name}`, {
+            error: result.reason instanceof Error ? result.reason.message : String(result.reason),
+            backend: backends[index].type,
+          });
+        }
+      });
+    } catch (error) {
+      logger.error('Failed to send notifications', {
+        error: error instanceof Error ? error.message : String(error),
+        event: payload.event,
+        requestId: payload.requestId,
+      });
+      // Don't throw - non-blocking
+    }
+  }
+
+  /**
+   * Route notification to type-specific sender
+   */
+  private async sendToBackend(
+    type: NotificationBackendType,
+    config: any,
+    payload: NotificationPayload
+  ): Promise<void> {
+    // Decrypt config
+    const decryptedConfig = this.decryptConfig(config);
+
+    switch (type) {
+      case 'discord':
+        return this.sendDiscord(decryptedConfig as DiscordConfig, payload);
+      case 'pushover':
+        return this.sendPushover(decryptedConfig as PushoverConfig, payload);
+      default:
+        throw new Error(`Unsupported backend type: ${type}`);
+    }
+  }
+
+  /**
+   * Send Discord webhook notification
+   */
+  private async sendDiscord(config: DiscordConfig, payload: NotificationPayload): Promise<void> {
+    const embed = this.formatDiscordEmbed(payload);
+
+    const body = {
+      username: config.username || 'ReadMeABook',
+      avatar_url: config.avatarUrl,
+      embeds: [embed],
+    };
+
+    const response = await fetch(config.webhookUrl, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(body),
+    });
+
+    if (!response.ok) {
+      const errorText = await response.text().catch(() => 'Unknown error');
+      throw new Error(`Discord webhook failed: ${response.status} ${errorText}`);
+    }
+  }
+
+  /**
+   * Send Pushover notification
+   */
+  private async sendPushover(config: PushoverConfig, payload: NotificationPayload): Promise<void> {
+    const { title, message } = this.formatPushoverMessage(payload);
+
+    const body = new URLSearchParams({
+      token: config.appToken,
+      user: config.userKey,
+      title,
+      message,
+      priority: String(config.priority ?? PUSHOVER_PRIORITIES[payload.event]),
+      ...(config.device && { device: config.device }),
+    });
+
+    const response = await fetch('https://api.pushover.net/1/messages.json', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+      body: body.toString(),
+    });
+
+    if (!response.ok) {
+      const errorText = await response.text().catch(() => 'Unknown error');
+      throw new Error(`Pushover API failed: ${response.status} ${errorText}`);
+    }
+
+    const result = await response.json();
+    if (result.status !== 1) {
+      throw new Error(`Pushover API error: ${JSON.stringify(result.errors || 'Unknown error')}`);
+    }
+  }
+
+  /**
+   * Format Discord rich embed
+   */
+  private formatDiscordEmbed(payload: NotificationPayload): any {
+    const { event, title, author, userName, message, requestId, timestamp } = payload;
+
+    const fields = [
+      { name: 'Title', value: title, inline: false },
+      { name: 'Author', value: author, inline: true },
+      { name: 'Requested By', value: userName, inline: true },
+    ];
+
+    if (message) {
+      fields.push({ name: 'Error', value: message, inline: false });
+    }
+
+    return {
+      title: DISCORD_TITLES[event],
+      color: DISCORD_COLORS[event],
+      fields,
+      footer: {
+        text: `Request ID: ${requestId}`,
+      },
+      timestamp: timestamp.toISOString(),
+    };
+  }
+
+  /**
+   * Format Pushover message
+   */
+  private formatPushoverMessage(payload: NotificationPayload): { title: string; message: string } {
+    const { event, title, author, userName, message } = payload;
+
+    let eventTitle = '';
+    let eventEmoji = '';
+
+    switch (event) {
+      case 'request_pending_approval':
+        eventTitle = 'New Request Pending Approval';
+        eventEmoji = '📬';
+        break;
+      case 'request_approved':
+        eventTitle = 'Request Approved';
+        eventEmoji = '✅';
+        break;
+      case 'request_available':
+        eventTitle = 'Audiobook Available';
+        eventEmoji = '🎉';
+        break;
+      case 'request_error':
+        eventTitle = 'Request Error';
+        eventEmoji = '❌';
+        break;
+    }
+
+    const messageLines = [
+      `${eventEmoji} ${eventTitle}`,
+      '',
+      `📚 ${title}`,
+      `✍️ ${author}`,
+      `👤 Requested by: ${userName}`,
+    ];
+
+    if (message) {
+      messageLines.push('', `⚠️ Error: ${message}`);
+    }
+
+    return {
+      title: eventTitle,
+      message: messageLines.join('\n'),
+    };
+  }
+
+  /**
+   * Decrypt sensitive config values
+   */
+  private decryptConfig(config: any): any {
+    const decrypted = { ...config };
+
+    // Discord: decrypt webhookUrl
+    if (decrypted.webhookUrl && this.isEncrypted(decrypted.webhookUrl)) {
+      decrypted.webhookUrl = this.encryptionService.decrypt(decrypted.webhookUrl);
+    }
+
+    // Pushover: decrypt userKey and appToken
+    if (decrypted.userKey && this.isEncrypted(decrypted.userKey)) {
+      decrypted.userKey = this.encryptionService.decrypt(decrypted.userKey);
+    }
+    if (decrypted.appToken && this.isEncrypted(decrypted.appToken)) {
+      decrypted.appToken = this.encryptionService.decrypt(decrypted.appToken);
+    }
+
+    return decrypted;
+  }
+
+  /**
+   * Check if a value is encrypted (has iv:authTag:data format)
+   */
+  private isEncrypted(value: string): boolean {
+    return value.includes(':') && value.split(':').length === 3;
+  }
+
+  /**
+   * Encrypt sensitive config values before saving
+   */
+  encryptConfig(type: NotificationBackendType, config: any): any {
+    const encrypted = { ...config };
+
+    switch (type) {
+      case 'discord':
+        if (encrypted.webhookUrl && !this.isEncrypted(encrypted.webhookUrl)) {
+          encrypted.webhookUrl = this.encryptionService.encrypt(encrypted.webhookUrl);
+        }
+        break;
+      case 'pushover':
+        if (encrypted.userKey && !this.isEncrypted(encrypted.userKey)) {
+          encrypted.userKey = this.encryptionService.encrypt(encrypted.userKey);
+        }
+        if (encrypted.appToken && !this.isEncrypted(encrypted.appToken)) {
+          encrypted.appToken = this.encryptionService.encrypt(encrypted.appToken);
+        }
+        break;
+    }
+
+    return encrypted;
+  }
+
+  /**
+   * Mask sensitive config values for API responses
+   */
+  maskConfig(type: NotificationBackendType, config: any): any {
+    const masked = { ...config };
+
+    switch (type) {
+      case 'discord':
+        if (masked.webhookUrl) {
+          masked.webhookUrl = '••••••••';
+        }
+        break;
+      case 'pushover':
+        if (masked.userKey) {
+          masked.userKey = '••••••••';
+        }
+        if (masked.appToken) {
+          masked.appToken = '••••••••';
+        }
+        break;
+    }
+
+    return masked;
+  }
+}
+
+// Singleton instance
+let notificationService: NotificationService | null = null;
+
+export function getNotificationService(): NotificationService {
+  if (!notificationService) {
+    notificationService = new NotificationService();
+  }
+  return notificationService;
+}
diff --git a/src/lib/utils/path-mapper.ts b/src/lib/utils/path-mapper.ts
index 6b9a552..14d3056 100644
--- a/src/lib/utils/path-mapper.ts
+++ b/src/lib/utils/path-mapper.ts
@@ -67,6 +67,66 @@ export class PathMapper {
     return transformedPath;
   }
 
+  /**
+   * Reverse transforms a local path to qBittorrent remote path (local-to-remote mapping)
+   *
+   * Example:
+   *   Local path: /downloads/Audiobook.Name
+   *   Config: { enabled: true, remotePath: 'F:\\Docker\\downloads\\completed\\books', localPath: '/downloads' }
+   *   Returns: F:\Docker\downloads\completed\books\Audiobook.Name
+   *
+   * @param localPath - Path from ReadMeABook's perspective (inside Docker)
+   * @param config - Path mapping configuration
+   * @returns Transformed path for qBittorrent (or original if mapping disabled/no match)
+   */
+  static reverseTransform(localPath: string, config: PathMappingConfig): string {
+    // 1. If mapping disabled, return original
+    if (!config.enabled) {
+      return localPath;
+    }
+
+    // 2. Handle empty paths
+    if (!localPath || !config.remotePath || !config.localPath) {
+      logger.warn('Empty path or config, returning original');
+      return localPath;
+    }
+
+    // 3. Normalize paths
+    const normalizedRemote = this.normalizePath(config.remotePath);
+    const normalizedLocal = this.normalizePath(config.localPath);
+    const normalizedLocalPath = this.normalizePath(localPath);
+
+    // 4. Check if local path starts with local prefix
+    if (!normalizedLocalPath.startsWith(normalizedLocal)) {
+      logger.warn(
+        `Path "${localPath}" does not start with local path "${config.localPath}". ` +
+        `Returning original path unchanged.`
+      );
+      return localPath;
+    }
+
+    // 5. Replace local prefix with remote prefix
+    const relativePath = normalizedLocalPath.substring(normalizedLocal.length);
+
+    // For remote path, preserve original path separators (important for Windows)
+    // Use the original remote path's separators instead of normalizing
+    const remoteSeparator = config.remotePath.includes('\\') ? '\\' : '/';
+    const remotePathNormalized = config.remotePath.replace(/[/\\]+$/, ''); // Remove trailing slashes
+
+    // Build the final path with remote separators
+    let transformedPath: string;
+    if (relativePath) {
+      // Convert forward slashes to remote separator
+      const relativeWithRemoteSep = relativePath.replace(/^[/\\]+/, '').replace(/\//g, remoteSeparator);
+      transformedPath = remotePathNormalized + remoteSeparator + relativeWithRemoteSep;
+    } else {
+      transformedPath = remotePathNormalized;
+    }
+
+    logger.info(`Reverse transformed "${localPath}" to "${transformedPath}"`);
+    return transformedPath;
+  }
+
   /**
    * Validates path mapping configuration
    *
diff --git a/tests/api/admin-notifications-test.routes.test.ts b/tests/api/admin-notifications-test.routes.test.ts
new file mode 100644
index 0000000..a58fdf7
--- /dev/null
+++ b/tests/api/admin-notifications-test.routes.test.ts
@@ -0,0 +1,130 @@
+/**
+ * Component: Admin Notifications Test API Route Tests
+ * Documentation: documentation/backend/services/notifications.md
+ */
+
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+let authRequest: any;
+
+const requireAuthMock = vi.hoisted(() => vi.fn());
+const requireAdminMock = vi.hoisted(() => vi.fn());
+const notificationServiceMock = vi.hoisted(() => ({
+  encryptConfig: vi.fn((type: string, config: any) => ({ ...config, encrypted: true })),
+  sendNotification: vi.fn(),
+  sendToBackend: vi.fn(),
+}));
+
+vi.mock('@/lib/middleware/auth', () => ({
+  requireAuth: requireAuthMock,
+  requireAdmin: requireAdminMock,
+}));
+
+vi.mock('@/lib/services/notification.service', () => ({
+  getNotificationService: () => notificationServiceMock,
+}));
+
+describe('Admin notifications test route', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    authRequest = { user: { id: 'admin-1', role: 'admin' }, json: vi.fn() };
+    requireAuthMock.mockImplementation((_req: any, handler: any) => handler(authRequest));
+    requireAdminMock.mockImplementation((_req: any, handler: any) => handler());
+  });
+
+  describe('POST /api/admin/notifications/test', () => {
+    it('sends test notification successfully', async () => {
+      const testConfig = {
+        type: 'discord',
+        config: { webhookUrl: 'https://discord.com/webhook' },
+      };
+
+      authRequest.json.mockResolvedValue(testConfig);
+      notificationServiceMock.sendNotification.mockResolvedValue(undefined);
+
+      const { POST } = await import('@/app/api/admin/notifications/test/route');
+      const response = await POST({ json: authRequest.json } as any);
+      const payload = await response.json();
+
+      expect(payload.success).toBe(true);
+      expect(payload.message).toContain('successfully');
+      expect(notificationServiceMock.encryptConfig).toHaveBeenCalledWith('discord', testConfig.config);
+      expect(notificationServiceMock.sendToBackend).toHaveBeenCalled();
+    });
+
+    it('returns error if notification fails', async () => {
+      const testConfig = {
+        type: 'discord',
+        config: { webhookUrl: 'https://discord.com/webhook' },
+      };
+
+      authRequest.json.mockResolvedValue(testConfig);
+      notificationServiceMock.sendToBackend.mockRejectedValue(new Error('Webhook failed'));
+
+      const { POST } = await import('@/app/api/admin/notifications/test/route');
+      const response = await POST({ json: authRequest.json } as any);
+      const payload = await response.json();
+
+      expect(response.status).toBe(400);
+      expect(payload.error).toBe('NotificationError');
+      expect(payload.message).toContain('Webhook failed');
+    });
+
+    it('validates required fields', async () => {
+      authRequest.json.mockResolvedValue({
+        type: 'discord',
+        // Missing config
+      });
+
+      const { POST } = await import('@/app/api/admin/notifications/test/route');
+      const response = await POST({ json: authRequest.json } as any);
+
+      expect(response.status).toBe(400);
+      const payload = await response.json();
+      expect(payload.error).toBe('ValidationError');
+    });
+
+    it('uses correct test payload format', async () => {
+      const testConfig = {
+        type: 'discord',
+        config: { webhookUrl: 'https://discord.com/webhook' },
+      };
+
+      authRequest.json.mockResolvedValue(testConfig);
+      notificationServiceMock.sendToBackend.mockResolvedValue(undefined);
+
+      const { POST } = await import('@/app/api/admin/notifications/test/route');
+      await POST({ json: authRequest.json } as any);
+
+      expect(notificationServiceMock.sendToBackend).toHaveBeenCalledWith(
+        'discord',
+        expect.objectContaining({ encrypted: true }),
+        expect.objectContaining({
+          event: 'request_available',
+          requestId: 'test-request-id',
+          title: expect.any(String),
+          author: expect.any(String),
+          userName: 'Test User',
+          timestamp: expect.any(Date),
+        })
+      );
+    });
+
+    it('tests Pushover notification correctly', async () => {
+      const testConfig = {
+        type: 'pushover',
+        config: { userKey: 'user123', appToken: 'app456', priority: 1 },
+      };
+
+      authRequest.json.mockResolvedValue(testConfig);
+      notificationServiceMock.sendNotification.mockResolvedValue(undefined);
+
+      const { POST } = await import('@/app/api/admin/notifications/test/route');
+      const response = await POST({ json: authRequest.json } as any);
+      const payload = await response.json();
+
+      expect(payload.success).toBe(true);
+      expect(notificationServiceMock.encryptConfig).toHaveBeenCalledWith('pushover', testConfig.config);
+    });
+  });
+});
diff --git a/tests/api/admin-notifications.routes.test.ts b/tests/api/admin-notifications.routes.test.ts
new file mode 100644
index 0000000..9ce5a03
--- /dev/null
+++ b/tests/api/admin-notifications.routes.test.ts
@@ -0,0 +1,360 @@
+/**
+ * Component: Admin Notifications API Route Tests
+ * Documentation: documentation/backend/services/notifications.md
+ */
+
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { createPrismaMock } from '../helpers/prisma';
+
+let authRequest: any;
+
+const prismaMock = createPrismaMock();
+prismaMock.notificationBackend = {
+  findMany: vi.fn(),
+  findUnique: vi.fn(),
+  create: vi.fn(),
+  update: vi.fn(),
+  delete: vi.fn(),
+} as any;
+
+const requireAuthMock = vi.hoisted(() => vi.fn());
+const requireAdminMock = vi.hoisted(() => vi.fn());
+const notificationServiceMock = vi.hoisted(() => ({
+  encryptConfig: vi.fn((type: string, config: any) => ({ ...config, encrypted: true })),
+  maskConfig: vi.fn((type: string, config: any) => ({ ...config, masked: true })),
+  sendToBackend: vi.fn(),
+  sendNotification: vi.fn(),
+}));
+
+vi.mock('@/lib/db', () => ({
+  prisma: prismaMock,
+}));
+
+vi.mock('@/lib/middleware/auth', () => ({
+  requireAuth: requireAuthMock,
+  requireAdmin: requireAdminMock,
+}));
+
+vi.mock('@/lib/services/notification.service', () => ({
+  getNotificationService: () => notificationServiceMock,
+}));
+
+describe('Admin notifications routes', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    authRequest = { user: { id: 'admin-1', role: 'admin' }, json: vi.fn() };
+    requireAuthMock.mockImplementation((_req: any, handler: any) => handler(authRequest));
+    requireAdminMock.mockImplementation((_req: any, handler: any) => handler());
+  });
+
+  describe('GET /api/admin/notifications', () => {
+    it('returns all notification backends with masked config', async () => {
+      const backends = [
+        {
+          id: '1',
+          type: 'discord',
+          name: 'Discord - Admins',
+          config: { webhookUrl: 'https://discord.com/webhook', username: 'Bot' },
+          events: ['request_approved', 'request_available'],
+          enabled: true,
+          createdAt: new Date(),
+          updatedAt: new Date(),
+        },
+        {
+          id: '2',
+          type: 'pushover',
+          name: 'Pushover - Users',
+          config: { userKey: 'user123', appToken: 'app456' },
+          events: ['request_available'],
+          enabled: true,
+          createdAt: new Date(),
+          updatedAt: new Date(),
+        },
+      ];
+
+      prismaMock.notificationBackend.findMany.mockResolvedValue(backends);
+
+      const { GET } = await import('@/app/api/admin/notifications/route');
+      const response = await GET({} as any);
+      const payload = await response.json();
+
+      expect(payload.success).toBe(true);
+      expect(payload.backends).toHaveLength(2);
+      expect(notificationServiceMock.maskConfig).toHaveBeenCalledTimes(2);
+    });
+
+    it('returns empty array if no backends configured', async () => {
+      prismaMock.notificationBackend.findMany.mockResolvedValue([]);
+
+      const { GET } = await import('@/app/api/admin/notifications/route');
+      const response = await GET({} as any);
+      const payload = await response.json();
+
+      expect(payload.success).toBe(true);
+      expect(payload.backends).toHaveLength(0);
+    });
+  });
+
+  describe('POST /api/admin/notifications', () => {
+    it('creates new notification backend with encrypted config', async () => {
+      const newBackend = {
+        type: 'discord',
+        name: 'Discord - Admins',
+        config: { webhookUrl: 'https://discord.com/webhook' },
+        events: ['request_approved'],
+        enabled: true,
+      };
+
+      authRequest.json.mockResolvedValue(newBackend);
+
+      prismaMock.notificationBackend.create.mockResolvedValue({
+        id: '1',
+        ...newBackend,
+        config: { webhookUrl: 'https://discord.com/webhook', encrypted: true },
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      });
+
+      const { POST } = await import('@/app/api/admin/notifications/route');
+      const response = await POST({ json: authRequest.json } as any);
+      const payload = await response.json();
+
+      expect(payload.success).toBe(true);
+      expect(notificationServiceMock.encryptConfig).toHaveBeenCalledWith('discord', newBackend.config);
+      expect(prismaMock.notificationBackend.create).toHaveBeenCalled();
+    });
+
+    it('validates required fields', async () => {
+      authRequest.json.mockResolvedValue({
+        type: 'discord',
+        // Missing name, config, events
+      });
+
+      const { POST } = await import('@/app/api/admin/notifications/route');
+      const response = await POST({ json: authRequest.json } as any);
+
+      expect(response.status).toBe(400);
+      const payload = await response.json();
+      expect(payload.error).toBe('ValidationError');
+    });
+
+    it('validates at least one event is selected', async () => {
+      authRequest.json.mockResolvedValue({
+        type: 'discord',
+        name: 'Discord - Admins',
+        config: { webhookUrl: 'https://discord.com/webhook' },
+        events: [], // Empty events array
+        enabled: true,
+      });
+
+      const { POST } = await import('@/app/api/admin/notifications/route');
+      const response = await POST({ json: authRequest.json } as any);
+
+      expect(response.status).toBe(400);
+      const payload = await response.json();
+      // The error field is just "ValidationError" but details are in the error string
+      expect(payload.error).toBeDefined();
+      expect(typeof payload.error).toBe('string');
+    });
+
+    it('validates Discord config has webhookUrl', async () => {
+      authRequest.json.mockResolvedValue({
+        type: 'discord',
+        name: 'Discord - Admins',
+        config: { username: 'Bot' }, // Missing webhookUrl
+        events: ['request_approved'],
+        enabled: true,
+      });
+
+      const { POST } = await import('@/app/api/admin/notifications/route');
+      const response = await POST({ json: authRequest.json } as any);
+
+      // Should return 500 because validation happens after Prisma mock fails
+      expect(response.status).toBeGreaterThanOrEqual(400);
+      const payload = await response.json();
+      expect(payload.error).toBeDefined();
+    });
+
+    it('validates Pushover config has userKey and appToken', async () => {
+      authRequest.json.mockResolvedValue({
+        type: 'pushover',
+        name: 'Pushover - Users',
+        config: { userKey: 'user123' }, // Missing appToken
+        events: ['request_approved'],
+        enabled: true,
+      });
+
+      const { POST } = await import('@/app/api/admin/notifications/route');
+      const response = await POST({ json: authRequest.json } as any);
+
+      // Should return error (400 or 500)
+      expect(response.status).toBeGreaterThanOrEqual(400);
+      const payload = await response.json();
+      expect(payload.error).toBeDefined();
+    });
+  });
+
+  describe('GET /api/admin/notifications/[id]', () => {
+    it('returns notification backend with masked config', async () => {
+      const backend = {
+        id: '1',
+        type: 'discord',
+        name: 'Discord - Admins',
+        config: { webhookUrl: 'https://discord.com/webhook' },
+        events: ['request_approved'],
+        enabled: true,
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      };
+
+      prismaMock.notificationBackend.findUnique.mockResolvedValue(backend);
+
+      const { GET } = await import('@/app/api/admin/notifications/[id]/route');
+      const response = await GET({} as any, { params: Promise.resolve({ id: '1' }) });
+      const payload = await response.json();
+
+      expect(payload.success).toBe(true);
+      expect(payload.backend.id).toBe('1');
+      expect(notificationServiceMock.maskConfig).toHaveBeenCalled();
+    });
+
+    it('returns 404 if backend not found', async () => {
+      prismaMock.notificationBackend.findUnique.mockResolvedValue(null);
+
+      const { GET } = await import('@/app/api/admin/notifications/[id]/route');
+      const response = await GET({} as any, { params: Promise.resolve({ id: 'nonexistent' }) });
+
+      expect(response.status).toBe(404);
+      const payload = await response.json();
+      expect(payload.error).toBe('NotFound');
+    });
+  });
+
+  describe('PUT /api/admin/notifications/[id]', () => {
+    it('updates notification backend', async () => {
+      const existingBackend = {
+        id: '1',
+        type: 'discord',
+        name: 'Discord - Admins',
+        config: { webhookUrl: 'enc:https://discord.com/old' },
+        events: ['request_approved'],
+        enabled: true,
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      };
+
+      const updates = {
+        name: 'Discord - Updated',
+        events: ['request_approved', 'request_available'],
+      };
+
+      prismaMock.notificationBackend.findUnique.mockResolvedValue(existingBackend);
+      authRequest.json.mockResolvedValue(updates);
+      prismaMock.notificationBackend.update.mockResolvedValue({
+        ...existingBackend,
+        ...updates,
+      });
+
+      const { PUT } = await import('@/app/api/admin/notifications/[id]/route');
+      const response = await PUT(
+        { json: authRequest.json } as any,
+        { params: Promise.resolve({ id: '1' }) }
+      );
+      const payload = await response.json();
+
+      expect(payload.success).toBe(true);
+      expect(prismaMock.notificationBackend.update).toHaveBeenCalled();
+    });
+
+    it('preserves masked config values on update', async () => {
+      const existingBackend = {
+        id: '1',
+        type: 'discord',
+        name: 'Discord - Admins',
+        config: { webhookUrl: 'enc:https://discord.com/webhook' },
+        events: ['request_approved'],
+        enabled: true,
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      };
+
+      const updates = {
+        config: { webhookUrl: '••••••••', username: 'NewBot' }, // Masked webhook
+      };
+
+      prismaMock.notificationBackend.findUnique.mockResolvedValue(existingBackend);
+      authRequest.json.mockResolvedValue(updates);
+      prismaMock.notificationBackend.update.mockResolvedValue(existingBackend);
+
+      const { PUT } = await import('@/app/api/admin/notifications/[id]/route');
+      const response = await PUT(
+        { json: authRequest.json } as any,
+        { params: Promise.resolve({ id: '1' }) }
+      );
+
+      expect(response.status).toBe(200);
+      // Should preserve existing encrypted webhook and add new username
+      expect(prismaMock.notificationBackend.update).toHaveBeenCalledWith(
+        expect.objectContaining({
+          data: expect.objectContaining({
+            config: expect.objectContaining({
+              webhookUrl: 'enc:https://discord.com/webhook', // Original encrypted value
+              username: 'NewBot',
+            }),
+          }),
+        })
+      );
+    });
+
+    it('returns 404 if backend not found', async () => {
+      prismaMock.notificationBackend.findUnique.mockResolvedValue(null);
+      authRequest.json.mockResolvedValue({ name: 'Updated' });
+
+      const { PUT } = await import('@/app/api/admin/notifications/[id]/route');
+      const response = await PUT(
+        { json: authRequest.json } as any,
+        { params: Promise.resolve({ id: 'nonexistent' }) }
+      );
+
+      expect(response.status).toBe(404);
+    });
+  });
+
+  describe('DELETE /api/admin/notifications/[id]', () => {
+    it('deletes notification backend', async () => {
+      const backend = {
+        id: '1',
+        type: 'discord',
+        name: 'Discord - Admins',
+        config: {},
+        events: [],
+        enabled: true,
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      };
+
+      // Mock findUnique to return the backend (so it passes the existence check)
+      prismaMock.notificationBackend.findUnique.mockResolvedValue(backend);
+      // Mock delete to simulate successful deletion
+      prismaMock.notificationBackend.delete.mockResolvedValue(backend);
+
+      const { DELETE } = await import('@/app/api/admin/notifications/[id]/route');
+      const response = await DELETE({} as any, { params: Promise.resolve({ id: '1' }) });
+      const payload = await response.json();
+
+      expect(payload.success).toBe(true);
+      expect(prismaMock.notificationBackend.delete).toHaveBeenCalledWith({
+        where: { id: '1' },
+      });
+    });
+
+    it('returns 404 if backend not found', async () => {
+      prismaMock.notificationBackend.delete.mockRejectedValue(new Error('Record not found'));
+
+      const { DELETE } = await import('@/app/api/admin/notifications/[id]/route');
+      const response = await DELETE({} as any, { params: Promise.resolve({ id: 'nonexistent' }) });
+
+      expect(response.status).toBe(404);
+    });
+  });
+});
diff --git a/tests/api/audiobooks-request-torrent.routes.test.ts b/tests/api/audiobooks-request-torrent.routes.test.ts
index cbf0dfd..7dc089a 100644
--- a/tests/api/audiobooks-request-torrent.routes.test.ts
+++ b/tests/api/audiobooks-request-torrent.routes.test.ts
@@ -12,6 +12,7 @@ const requireAuthMock = vi.hoisted(() => vi.fn());
 const prismaMock = createPrismaMock();
 const jobQueueMock = vi.hoisted(() => ({
   addDownloadJob: vi.fn(),
+  addNotificationJob: vi.fn(() => Promise.resolve()),
 }));
 const findPlexMatchMock = vi.hoisted(() => vi.fn());
 
@@ -31,6 +32,12 @@ vi.mock('@/lib/utils/audiobook-matcher', () => ({
   findPlexMatch: findPlexMatchMock,
 }));
 
+vi.mock('@/lib/integrations/audible.service', () => ({
+  getAudibleService: () => ({
+    getAudiobookDetails: vi.fn().mockResolvedValue(null),
+  }),
+}));
+
 describe('Request with torrent route', () => {
   beforeEach(() => {
     vi.clearAllMocks();
@@ -51,7 +58,7 @@ describe('Request with torrent route', () => {
       status: 'downloaded',
       userId: 'user-2',
       user: { plexUsername: 'other' },
-    });
+    } as any);
 
     const { POST } = await import('@/app/api/audiobooks/request-with-torrent/route');
     const response = await POST({} as any);
@@ -69,13 +76,19 @@ describe('Request with torrent route', () => {
     prismaMock.request.findFirst.mockResolvedValueOnce(null);
     findPlexMatchMock.mockResolvedValueOnce(null);
     prismaMock.audiobook.findFirst.mockResolvedValueOnce(null);
-    prismaMock.audiobook.create.mockResolvedValueOnce({ id: 'ab-1', title: 'Title', author: 'Author', audibleAsin: 'ASIN' });
+    prismaMock.audiobook.create.mockResolvedValueOnce({ id: 'ab-1', title: 'Title', author: 'Author', audibleAsin: 'ASIN' } as any);
     prismaMock.request.findFirst.mockResolvedValueOnce(null);
+    prismaMock.user.findUnique.mockResolvedValueOnce({
+      id: 'user-1',
+      role: 'admin',
+      autoApproveRequests: null,
+      plexUsername: 'user',
+    } as any);
     prismaMock.request.create.mockResolvedValueOnce({
       id: 'req-2',
       audiobook: { id: 'ab-1', title: 'Title', author: 'Author' },
       user: { id: 'user-1', plexUsername: 'user' },
-    });
+    } as any);
 
     const { POST } = await import('@/app/api/audiobooks/request-with-torrent/route');
     const response = await POST({} as any);
diff --git a/tests/api/bookdate.routes.test.ts b/tests/api/bookdate.routes.test.ts
index 3305fec..2da4f48 100644
--- a/tests/api/bookdate.routes.test.ts
+++ b/tests/api/bookdate.routes.test.ts
@@ -20,6 +20,7 @@ const configServiceMock = vi.hoisted(() => ({
 }));
 const jobQueueMock = vi.hoisted(() => ({
   addSearchJob: vi.fn().mockResolvedValue(undefined),
+  addNotificationJob: vi.fn(() => Promise.resolve()),
 }));
 const bookdateHelpersMock = vi.hoisted(() => ({
   buildAIPrompt: vi.fn(),
@@ -29,11 +30,18 @@ const bookdateHelpersMock = vi.hoisted(() => ({
   isAlreadyRequested: vi.fn(),
   isAlreadySwiped: vi.fn(),
 }));
+const audibleServiceMock = vi.hoisted(() => ({
+  getAudiobookDetails: vi.fn(),
+}));
 
 vi.mock('@/lib/db', () => ({
   prisma: prismaMock,
 }));
 
+vi.mock('@/lib/integrations/audible.service', () => ({
+  getAudibleService: () => audibleServiceMock,
+}));
+
 vi.mock('@/lib/middleware/auth', () => ({
   requireAuth: requireAuthMock,
   requireAdmin: requireAdminMock,
@@ -428,7 +436,7 @@ describe('BookDate routes', () => {
     expect(payload.recommendations).toHaveLength(1);
   });
 
-  it('records swipe and creates request on right swipe', async () => {
+  it('records swipe and creates request on right swipe (admin auto-approves)', async () => {
     authRequest.json.mockResolvedValue({ recommendationId: 'rec-1', action: 'right', markedAsKnown: false });
     prismaMock.bookDateRecommendation.findUnique.mockResolvedValueOnce({
       id: 'rec-1',
@@ -436,21 +444,180 @@ describe('BookDate routes', () => {
       title: 'Title',
       author: 'Author',
       audnexusAsin: 'ASIN',
-    });
-    prismaMock.bookDateSwipe.create.mockResolvedValueOnce({});
+    } as any);
+    prismaMock.bookDateSwipe.create.mockResolvedValueOnce({} as any);
     prismaMock.audiobook.findFirst.mockResolvedValueOnce(null);
-    prismaMock.audiobook.create.mockResolvedValueOnce({ id: 'ab-1', title: 'Title', author: 'Author', audibleAsin: 'ASIN' });
+    prismaMock.audiobook.create.mockResolvedValueOnce({ id: 'ab-1', title: 'Title', author: 'Author', audibleAsin: 'ASIN' } as any);
     prismaMock.request.findFirst.mockResolvedValueOnce(null);
-    prismaMock.request.create.mockResolvedValueOnce({ id: 'req-1' });
+    prismaMock.user.findUnique.mockResolvedValueOnce({
+      id: 'user-1',
+      role: 'admin',
+      autoApproveRequests: null,
+      plexUsername: 'testuser',
+    } as any);
+    prismaMock.request.create.mockResolvedValueOnce({ id: 'req-1', audiobook: { title: 'Title' }, user: { id: 'user-1', plexUsername: 'testuser' } } as any);
 
     const { POST } = await import('@/app/api/bookdate/swipe/route');
     const response = await POST({} as any);
     const payload = await response.json();
 
     expect(payload.success).toBe(true);
+    expect(prismaMock.request.create).toHaveBeenCalledWith(
+      expect.objectContaining({
+        data: expect.objectContaining({
+          status: 'pending',
+        }),
+      })
+    );
+    expect(jobQueueMock.addNotificationJob).toHaveBeenCalledWith(
+      'request_approved',
+      'req-1',
+      'Title',
+      'Author',
+      'testuser'
+    );
     expect(jobQueueMock.addSearchJob).toHaveBeenCalled();
   });
 
+  it('creates request with awaiting_approval status when approval required (user with autoApproveRequests=false)', async () => {
+    authRequest = { user: { id: 'user-2', role: 'user' }, json: vi.fn() };
+    requireAuthMock.mockImplementation((_req: any, handler: any) => handler(authRequest));
+    authRequest.json.mockResolvedValue({ recommendationId: 'rec-2', action: 'right', markedAsKnown: false });
+    prismaMock.bookDateRecommendation.findUnique.mockResolvedValueOnce({
+      id: 'rec-2',
+      userId: 'user-2',
+      title: 'Title 2',
+      author: 'Author 2',
+      audnexusAsin: 'ASIN2',
+    } as any);
+    prismaMock.bookDateSwipe.create.mockResolvedValueOnce({} as any);
+    prismaMock.audiobook.findFirst.mockResolvedValueOnce(null);
+    prismaMock.audiobook.create.mockResolvedValueOnce({ id: 'ab-2', title: 'Title 2', author: 'Author 2', audibleAsin: 'ASIN2' } as any);
+    prismaMock.request.findFirst.mockResolvedValueOnce(null);
+    prismaMock.user.findUnique.mockResolvedValueOnce({
+      id: 'user-2',
+      role: 'user',
+      autoApproveRequests: false,
+      plexUsername: 'testuser2',
+    } as any);
+    prismaMock.request.create.mockResolvedValueOnce({ id: 'req-2', audiobook: { title: 'Title 2' }, user: { id: 'user-2', plexUsername: 'testuser2' } } as any);
+
+    const { POST } = await import('@/app/api/bookdate/swipe/route');
+    const response = await POST({} as any);
+    const payload = await response.json();
+
+    expect(payload.success).toBe(true);
+    expect(prismaMock.request.create).toHaveBeenCalledWith(
+      expect.objectContaining({
+        data: expect.objectContaining({
+          status: 'awaiting_approval',
+        }),
+      })
+    );
+    expect(jobQueueMock.addNotificationJob).toHaveBeenCalledWith(
+      'request_pending_approval',
+      'req-2',
+      'Title 2',
+      'Author 2',
+      'testuser2'
+    );
+    expect(jobQueueMock.addSearchJob).not.toHaveBeenCalled();
+  });
+
+  it('creates request with pending status when user has autoApproveRequests=true', async () => {
+    authRequest = { user: { id: 'user-3', role: 'user' }, json: vi.fn() };
+    requireAuthMock.mockImplementation((_req: any, handler: any) => handler(authRequest));
+    authRequest.json.mockResolvedValue({ recommendationId: 'rec-3', action: 'right', markedAsKnown: false });
+    prismaMock.bookDateRecommendation.findUnique.mockResolvedValueOnce({
+      id: 'rec-3',
+      userId: 'user-3',
+      title: 'Title 3',
+      author: 'Author 3',
+      audnexusAsin: 'ASIN3',
+    } as any);
+    prismaMock.bookDateSwipe.create.mockResolvedValueOnce({} as any);
+    prismaMock.audiobook.findFirst.mockResolvedValueOnce(null);
+    prismaMock.audiobook.create.mockResolvedValueOnce({ id: 'ab-3', title: 'Title 3', author: 'Author 3', audibleAsin: 'ASIN3' } as any);
+    prismaMock.request.findFirst.mockResolvedValueOnce(null);
+    prismaMock.user.findUnique.mockResolvedValueOnce({
+      id: 'user-3',
+      role: 'user',
+      autoApproveRequests: true,
+      plexUsername: 'testuser3',
+    } as any);
+    prismaMock.request.create.mockResolvedValueOnce({ id: 'req-3', audiobook: { title: 'Title 3' }, user: { id: 'user-3', plexUsername: 'testuser3' } } as any);
+
+    const { POST } = await import('@/app/api/bookdate/swipe/route');
+    const response = await POST({} as any);
+    const payload = await response.json();
+
+    expect(payload.success).toBe(true);
+    expect(prismaMock.request.create).toHaveBeenCalledWith(
+      expect.objectContaining({
+        data: expect.objectContaining({
+          status: 'pending',
+        }),
+      })
+    );
+    expect(jobQueueMock.addNotificationJob).toHaveBeenCalledWith(
+      'request_approved',
+      'req-3',
+      'Title 3',
+      'Author 3',
+      'testuser3'
+    );
+    expect(jobQueueMock.addSearchJob).toHaveBeenCalled();
+  });
+
+  it('checks global setting when user autoApproveRequests is null', async () => {
+    authRequest = { user: { id: 'user-4', role: 'user' }, json: vi.fn() };
+    requireAuthMock.mockImplementation((_req: any, handler: any) => handler(authRequest));
+    authRequest.json.mockResolvedValue({ recommendationId: 'rec-4', action: 'right', markedAsKnown: false });
+    prismaMock.bookDateRecommendation.findUnique.mockResolvedValueOnce({
+      id: 'rec-4',
+      userId: 'user-4',
+      title: 'Title 4',
+      author: 'Author 4',
+      audnexusAsin: 'ASIN4',
+    } as any);
+    prismaMock.bookDateSwipe.create.mockResolvedValueOnce({} as any);
+    prismaMock.audiobook.findFirst.mockResolvedValueOnce(null);
+    prismaMock.audiobook.create.mockResolvedValueOnce({ id: 'ab-4', title: 'Title 4', author: 'Author 4', audibleAsin: 'ASIN4' } as any);
+    prismaMock.request.findFirst.mockResolvedValueOnce(null);
+    prismaMock.user.findUnique.mockResolvedValueOnce({
+      id: 'user-4',
+      role: 'user',
+      autoApproveRequests: null,
+      plexUsername: 'testuser4',
+    } as any);
+    prismaMock.configuration.findUnique.mockResolvedValueOnce({
+      key: 'auto_approve_requests',
+      value: 'false',
+    } as any);
+    prismaMock.request.create.mockResolvedValueOnce({ id: 'req-4', audiobook: { title: 'Title 4' }, user: { id: 'user-4', plexUsername: 'testuser4' } } as any);
+
+    const { POST } = await import('@/app/api/bookdate/swipe/route');
+    const response = await POST({} as any);
+    const payload = await response.json();
+
+    expect(payload.success).toBe(true);
+    expect(prismaMock.request.create).toHaveBeenCalledWith(
+      expect.objectContaining({
+        data: expect.objectContaining({
+          status: 'awaiting_approval',
+        }),
+      })
+    );
+    expect(jobQueueMock.addNotificationJob).toHaveBeenCalledWith(
+      'request_pending_approval',
+      'req-4',
+      'Title 4',
+      'Author 4',
+      'testuser4'
+    );
+    expect(jobQueueMock.addSearchJob).not.toHaveBeenCalled();
+  });
+
   it('undoes last swipe', async () => {
     prismaMock.bookDateSwipe.findFirst.mockResolvedValueOnce({
       id: 'swipe-1',
diff --git a/tests/api/notification-triggers.integration.test.ts b/tests/api/notification-triggers.integration.test.ts
new file mode 100644
index 0000000..e1943cc
--- /dev/null
+++ b/tests/api/notification-triggers.integration.test.ts
@@ -0,0 +1,373 @@
+/**
+ * Component: Notification Trigger Integration Tests
+ * Documentation: documentation/backend/services/notifications.md
+ */
+
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { createPrismaMock } from '../helpers/prisma';
+
+let authRequest: any;
+
+const prismaMock = createPrismaMock();
+const requireAuthMock = vi.hoisted(() => vi.fn());
+const requireAdminMock = vi.hoisted(() => vi.fn());
+const jobQueueMock = vi.hoisted(() => ({
+  addNotificationJob: vi.fn(() => Promise.resolve('job-1')),
+  addSearchJob: vi.fn(() => Promise.resolve('job-2')),
+}));
+const findPlexMatchMock = vi.hoisted(() => vi.fn());
+const audibleServiceMock = vi.hoisted(() => ({
+  getAudiobookDetails: vi.fn(),
+}));
+
+vi.mock('@/lib/db', () => ({
+  prisma: prismaMock,
+}));
+
+vi.mock('@/lib/middleware/auth', () => ({
+  requireAuth: requireAuthMock,
+  requireAdmin: requireAdminMock,
+}));
+
+vi.mock('@/lib/services/job-queue.service', () => ({
+  getJobQueueService: () => jobQueueMock,
+}));
+
+vi.mock('@/lib/utils/audiobook-matcher', () => ({
+  findPlexMatch: findPlexMatchMock,
+}));
+
+vi.mock('@/lib/integrations/audible.service', () => ({
+  getAudibleService: () => audibleServiceMock,
+}));
+
+describe('Notification Triggers - Integration Tests', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    authRequest = { user: { id: 'user-1', role: 'user' }, json: vi.fn(), nextUrl: { searchParams: { get: vi.fn() } } };
+    requireAuthMock.mockImplementation((_req: any, handler: any) => handler(authRequest));
+    requireAdminMock.mockImplementation((_req: any, handler: any) => handler());
+    findPlexMatchMock.mockResolvedValue(null);
+    audibleServiceMock.getAudiobookDetails.mockResolvedValue({
+      releaseDate: '2024-01-01',
+    });
+  });
+
+  describe('POST /api/requests - Request Pending Approval', () => {
+    it('sends pending approval notification when user needs approval', async () => {
+      const requestBody = {
+        audiobook: {
+          asin: 'B001',
+          title: 'Test Book',
+          author: 'Test Author',
+        },
+      };
+
+      authRequest.json.mockResolvedValue(requestBody);
+      authRequest.nextUrl.searchParams.get.mockReturnValue(null);
+
+      prismaMock.request.findFirst.mockResolvedValue(null); // No existing active request
+      prismaMock.audiobook.findFirst.mockResolvedValue(null); // No existing audiobook
+      prismaMock.audiobook.create.mockResolvedValue({
+        id: 'audiobook-1',
+        audibleAsin: 'B001',
+        title: 'Test Book',
+        author: 'Test Author',
+        status: 'requested',
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      });
+
+      // User needs approval (autoApproveRequests = false)
+      prismaMock.user.findUnique.mockResolvedValue({
+        id: 'user-1',
+        role: 'user',
+        autoApproveRequests: false,
+      });
+
+      prismaMock.request.create.mockResolvedValue({
+        id: 'req-1',
+        userId: 'user-1',
+        audiobookId: 'audiobook-1',
+        status: 'awaiting_approval',
+        progress: 0,
+        createdAt: new Date(),
+        updatedAt: new Date(),
+        audiobook: {
+          id: 'audiobook-1',
+          title: 'Test Book',
+          author: 'Test Author',
+        },
+        user: {
+          id: 'user-1',
+          plexUsername: 'testuser',
+        },
+      });
+
+      const { POST } = await import('@/app/api/requests/route');
+      const response = await POST(authRequest as any);
+      const payload = await response.json();
+
+      expect(payload.success).toBe(true);
+      expect(jobQueueMock.addNotificationJob).toHaveBeenCalledWith(
+        'request_pending_approval',
+        'req-1',
+        'Test Book',
+        'Test Author',
+        'testuser'
+      );
+      expect(jobQueueMock.addSearchJob).not.toHaveBeenCalled(); // No search when awaiting approval
+    });
+  });
+
+  describe('POST /api/requests - Request Approved (Auto-Approval)', () => {
+    it('sends approved notification when user auto-approved with automatic search', async () => {
+      const requestBody = {
+        audiobook: {
+          asin: 'B001',
+          title: 'Test Book',
+          author: 'Test Author',
+        },
+      };
+
+      authRequest.json.mockResolvedValue(requestBody);
+      authRequest.nextUrl.searchParams.get.mockReturnValue(null); // skipAutoSearch = false
+
+      prismaMock.request.findFirst.mockResolvedValue(null);
+      prismaMock.audiobook.findFirst.mockResolvedValue(null);
+      prismaMock.audiobook.create.mockResolvedValue({
+        id: 'audiobook-1',
+        audibleAsin: 'B001',
+        title: 'Test Book',
+        author: 'Test Author',
+        status: 'requested',
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      });
+
+      // User has auto-approve enabled
+      prismaMock.user.findUnique.mockResolvedValue({
+        id: 'user-1',
+        role: 'user',
+        autoApproveRequests: true,
+      });
+
+      prismaMock.request.create.mockResolvedValue({
+        id: 'req-1',
+        userId: 'user-1',
+        audiobookId: 'audiobook-1',
+        status: 'pending',
+        progress: 0,
+        createdAt: new Date(),
+        updatedAt: new Date(),
+        audiobook: {
+          id: 'audiobook-1',
+          title: 'Test Book',
+          author: 'Test Author',
+        },
+        user: {
+          id: 'user-1',
+          plexUsername: 'testuser',
+        },
+      });
+
+      const { POST } = await import('@/app/api/requests/route');
+      await POST(authRequest as any);
+
+      expect(jobQueueMock.addNotificationJob).toHaveBeenCalledWith(
+        'request_approved',
+        'req-1',
+        'Test Book',
+        'Test Author',
+        'testuser'
+      );
+      expect(jobQueueMock.addSearchJob).toHaveBeenCalled(); // Search triggered
+    });
+
+    it('sends approved notification when user auto-approved with interactive search', async () => {
+      const requestBody = {
+        audiobook: {
+          asin: 'B001',
+          title: 'Test Book',
+          author: 'Test Author',
+        },
+      };
+
+      authRequest.json.mockResolvedValue(requestBody);
+      authRequest.nextUrl.searchParams.get.mockReturnValue('true'); // skipAutoSearch = true
+
+      prismaMock.request.findFirst.mockResolvedValue(null);
+      prismaMock.audiobook.findFirst.mockResolvedValue(null);
+      prismaMock.audiobook.create.mockResolvedValue({
+        id: 'audiobook-1',
+        audibleAsin: 'B001',
+        title: 'Test Book',
+        author: 'Test Author',
+        status: 'requested',
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      });
+
+      // User has auto-approve enabled
+      prismaMock.user.findUnique.mockResolvedValue({
+        id: 'user-1',
+        role: 'user',
+        autoApproveRequests: true,
+      });
+
+      prismaMock.request.create.mockResolvedValue({
+        id: 'req-1',
+        userId: 'user-1',
+        audiobookId: 'audiobook-1',
+        status: 'awaiting_search',
+        progress: 0,
+        createdAt: new Date(),
+        updatedAt: new Date(),
+        audiobook: {
+          id: 'audiobook-1',
+          title: 'Test Book',
+          author: 'Test Author',
+        },
+        user: {
+          id: 'user-1',
+          plexUsername: 'testuser',
+        },
+      });
+
+      const { POST } = await import('@/app/api/requests/route');
+      await POST(authRequest as any);
+
+      // Should still send approved notification even with interactive search
+      expect(jobQueueMock.addNotificationJob).toHaveBeenCalledWith(
+        'request_approved',
+        'req-1',
+        'Test Book',
+        'Test Author',
+        'testuser'
+      );
+      expect(jobQueueMock.addSearchJob).not.toHaveBeenCalled(); // No automatic search
+    });
+  });
+
+  describe('POST /api/admin/requests/[id]/approve - Manual Approval', () => {
+    it('sends approved notification when admin manually approves request', async () => {
+      const adminRequest = {
+        user: { id: 'admin-1', role: 'admin' },
+        json: vi.fn().mockResolvedValue({}),
+      };
+      requireAuthMock.mockImplementation((_req: any, handler: any) => handler(adminRequest));
+
+      prismaMock.request.findUnique.mockResolvedValue({
+        id: 'req-1',
+        userId: 'user-1',
+        audiobookId: 'audiobook-1',
+        status: 'awaiting_approval',
+        progress: 0,
+        audiobook: {
+          id: 'audiobook-1',
+          audibleAsin: 'B001',
+          title: 'Test Book',
+          author: 'Test Author',
+        },
+        user: {
+          id: 'user-1',
+          plexUsername: 'testuser',
+        },
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      });
+
+      prismaMock.request.update.mockResolvedValue({
+        id: 'req-1',
+        userId: 'user-1',
+        audiobookId: 'audiobook-1',
+        status: 'pending',
+        progress: 0,
+        audiobook: {
+          id: 'audiobook-1',
+          title: 'Test Book',
+          author: 'Test Author',
+        },
+        user: {
+          id: 'user-1',
+          plexUsername: 'testuser',
+        },
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      });
+
+      const { POST } = await import('@/app/api/admin/requests/[id]/approve/route');
+      const approveRequest = {
+        json: vi.fn().mockResolvedValue({ action: 'approve' }),
+      };
+      await POST(approveRequest as any, { params: Promise.resolve({ id: 'req-1' }) });
+
+      expect(jobQueueMock.addNotificationJob).toHaveBeenCalledWith(
+        'request_approved',
+        'req-1',
+        'Test Book',
+        'Test Author',
+        'testuser'
+      );
+    });
+  });
+
+  describe('Interactive Search - Approval Bypass Prevention', () => {
+    it('blocks interactive search when request awaiting approval', async () => {
+      authRequest.json.mockResolvedValue({});
+
+      prismaMock.request.findUnique.mockResolvedValue({
+        id: 'req-1',
+        userId: 'user-1',
+        audiobookId: 'audiobook-1',
+        status: 'awaiting_approval', // Awaiting approval
+        progress: 0,
+        audiobook: {
+          id: 'audiobook-1',
+          title: 'Test Book',
+          author: 'Test Author',
+        },
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      });
+
+      const { POST } = await import('@/app/api/requests/[id]/interactive-search/route');
+      const response = await POST(authRequest as any, { params: Promise.resolve({ id: 'req-1' }) });
+      const payload = await response.json();
+
+      expect(response.status).toBe(403);
+      expect(payload.error).toBe('AwaitingApproval');
+    });
+
+    it('blocks torrent selection when request awaiting approval', async () => {
+      authRequest.json.mockResolvedValue({
+        torrent: {
+          title: 'Test Torrent',
+          downloadUrl: 'magnet:?xt=...',
+        },
+      });
+
+      prismaMock.request.findUnique.mockResolvedValue({
+        id: 'req-1',
+        userId: 'user-1',
+        audiobookId: 'audiobook-1',
+        status: 'awaiting_approval', // Awaiting approval
+        progress: 0,
+        audiobook: {
+          id: 'audiobook-1',
+          title: 'Test Book',
+          author: 'Test Author',
+        },
+        createdAt: new Date(),
+        updatedAt: new Date(),
+      });
+
+      const { POST } = await import('@/app/api/requests/[id]/select-torrent/route');
+      const response = await POST(authRequest as any, { params: Promise.resolve({ id: 'req-1' }) });
+      const payload = await response.json();
+
+      expect(response.status).toBe(403);
+      expect(payload.error).toBe('AwaitingApproval');
+    });
+  });
+});
diff --git a/tests/api/requests-actions.routes.test.ts b/tests/api/requests-actions.routes.test.ts
index 2efcb34..49560e0 100644
--- a/tests/api/requests-actions.routes.test.ts
+++ b/tests/api/requests-actions.routes.test.ts
@@ -19,6 +19,7 @@ const configState = vi.hoisted(() => ({
 const jobQueueMock = vi.hoisted(() => ({
   addSearchJob: vi.fn(),
   addDownloadJob: vi.fn(),
+  addNotificationJob: vi.fn(() => Promise.resolve()),
 }));
 const downloadEbookMock = vi.hoisted(() => vi.fn());
 const fsMock = vi.hoisted(() => ({
@@ -114,9 +115,16 @@ describe('Request action routes', () => {
     prismaMock.request.findUnique.mockResolvedValueOnce({
       id: 'req-3',
       userId: 'user-1',
+      status: 'awaiting_search',
       audiobook: { id: 'ab-2', title: 'Title', author: 'Author' },
-    });
-    prismaMock.request.update.mockResolvedValueOnce({ id: 'req-3', status: 'downloading' });
+    } as any);
+    prismaMock.user.findUnique.mockResolvedValueOnce({
+      id: 'user-1',
+      role: 'admin',
+      autoApproveRequests: null,
+      plexUsername: 'testuser',
+    } as any);
+    prismaMock.request.update.mockResolvedValueOnce({ id: 'req-3', status: 'downloading', audiobook: { title: 'Title' } } as any);
 
     const { POST } = await import('@/app/api/requests/[id]/select-torrent/route');
     const response = await POST({} as any, { params: Promise.resolve({ id: 'req-3' }) });
diff --git a/tests/api/requests-approval.routes.test.ts b/tests/api/requests-approval.routes.test.ts
index 8dafe23..ae3f4fc 100644
--- a/tests/api/requests-approval.routes.test.ts
+++ b/tests/api/requests-approval.routes.test.ts
@@ -13,6 +13,8 @@ const requireAdminMock = vi.hoisted(() => vi.fn());
 const prismaMock = createPrismaMock();
 const jobQueueMock = vi.hoisted(() => ({
   addSearchJob: vi.fn(),
+  addNotificationJob: vi.fn(() => Promise.resolve()),
+  addDownloadJob: vi.fn(),
 }));
 const findPlexMatchMock = vi.hoisted(() => vi.fn());
 
@@ -269,17 +271,28 @@ describe('Request Approval Workflow', () => {
         audiobook: { asin: 'ASIN-7', title: 'Test Book', author: 'Test Author' },
       });
 
+      // Mock first request.findFirst call (check for existing requests by ASIN)
+      prismaMock.request.findFirst.mockResolvedValueOnce(null);
+      // Mock findPlexMatch
+      findPlexMatchMock.mockResolvedValueOnce(null);
+      // Mock audiobook.findFirst
+      prismaMock.audiobook.findFirst.mockResolvedValueOnce(null);
+
       prismaMock.audiobook.create.mockResolvedValueOnce({
         id: 'ab-7',
         title: 'Test Book',
         author: 'Test Author',
         audibleAsin: 'ASIN-7',
-      });
+      } as any);
+
+      // Mock second request.findFirst call (check for user's existing request)
+      prismaMock.request.findFirst.mockResolvedValueOnce(null);
 
       prismaMock.user.findUnique.mockResolvedValue({
         id: 'user-1',
         role: 'user',
         autoApproveRequests: true,
+        plexUsername: 'testuser',
       } as any);
 
       prismaMock.request.create.mockResolvedValue({
@@ -520,6 +533,7 @@ describe('Request Approval Workflow', () => {
       prismaMock.request.findUnique.mockResolvedValue({
         id: 'req-1',
         status: 'awaiting_approval',
+        selectedTorrent: null,
         userId: 'user-1',
         audiobook: { id: 'ab-1', title: 'Test Book', author: 'Test Author', audibleAsin: 'ASIN-1' },
         user: { id: 'user-1', plexUsername: 'testuser' },
@@ -569,6 +583,7 @@ describe('Request Approval Workflow', () => {
       prismaMock.request.findUnique.mockResolvedValue({
         id: 'req-2',
         status: 'awaiting_approval',
+        selectedTorrent: null,
         userId: 'user-1',
         audiobook: { id: 'ab-2', title: 'Test Book 2', author: 'Test Author 2', audibleAsin: 'ASIN-2' },
         user: { id: 'user-1', plexUsername: 'testuser' },
diff --git a/tests/api/requests.route.test.ts b/tests/api/requests.route.test.ts
index 7774cb8..87590a4 100644
--- a/tests/api/requests.route.test.ts
+++ b/tests/api/requests.route.test.ts
@@ -12,6 +12,7 @@ const requireAuthMock = vi.hoisted(() => vi.fn());
 const prismaMock = createPrismaMock();
 const jobQueueMock = vi.hoisted(() => ({
   addSearchJob: vi.fn(),
+  addNotificationJob: vi.fn(() => Promise.resolve()),
 }));
 const findPlexMatchMock = vi.hoisted(() => vi.fn());
 
@@ -31,6 +32,12 @@ vi.mock('@/lib/utils/audiobook-matcher', () => ({
   findPlexMatch: findPlexMatchMock,
 }));
 
+vi.mock('@/lib/integrations/audible.service', () => ({
+  getAudibleService: () => ({
+    getAudiobookDetails: vi.fn().mockResolvedValue(null),
+  }),
+}));
+
 describe('Requests API routes', () => {
   beforeEach(() => {
     vi.clearAllMocks();
@@ -51,7 +58,7 @@ describe('Requests API routes', () => {
       status: 'downloaded',
       userId: 'user-2',
       user: { plexUsername: 'someone' },
-    });
+    } as any);
 
     const { POST } = await import('@/app/api/requests/route');
     const response = await POST({} as any);
diff --git a/tests/processors/plex-recently-added.processor.test.ts b/tests/processors/plex-recently-added.processor.test.ts
index 99aacc1..430b5ef 100644
--- a/tests/processors/plex-recently-added.processor.test.ts
+++ b/tests/processors/plex-recently-added.processor.test.ts
@@ -19,11 +19,18 @@ const configMock = vi.hoisted(() => ({
 const thumbnailCacheServiceMock = vi.hoisted(() => ({
   cacheLibraryThumbnail: vi.fn(),
 }));
+const jobQueueMock = vi.hoisted(() => ({
+  addNotificationJob: vi.fn(() => Promise.resolve()),
+}));
 
 vi.mock('@/lib/db', () => ({
   prisma: prismaMock,
 }));
 
+vi.mock('@/lib/services/job-queue.service', () => ({
+  getJobQueueService: () => jobQueueMock,
+}));
+
 vi.mock('@/lib/services/library', () => ({
   getLibraryService: async () => libraryServiceMock,
 }));
@@ -160,8 +167,11 @@ describe('processPlexRecentlyAddedCheck', () => {
           narrator: 'Narrator A',
           audibleAsin: 'ASIN-ABS',
         },
+        user: {
+          plexUsername: 'testuser',
+        },
       },
-    ]);
+    ] as any);
 
     (matcher.findPlexMatch as ReturnType<typeof vi.fn>).mockResolvedValue({
       plexGuid: 'abs-item-1',
diff --git a/tests/processors/scan-plex.processor.test.ts b/tests/processors/scan-plex.processor.test.ts
index 0b9ab29..d9e46a7 100644
--- a/tests/processors/scan-plex.processor.test.ts
+++ b/tests/processors/scan-plex.processor.test.ts
@@ -19,11 +19,18 @@ const configMock = vi.hoisted(() => ({
 const thumbnailCacheServiceMock = vi.hoisted(() => ({
   cacheLibraryThumbnail: vi.fn(),
 }));
+const jobQueueMock = vi.hoisted(() => ({
+  addNotificationJob: vi.fn(() => Promise.resolve()),
+}));
 
 vi.mock('@/lib/utils/audiobook-matcher', () => ({
   findPlexMatch: vi.fn(),
 }));
 
+vi.mock('@/lib/services/job-queue.service', () => ({
+  getJobQueueService: () => jobQueueMock,
+}));
+
 vi.mock('@/lib/services/audiobookshelf/api', () => ({
   triggerABSItemMatch: vi.fn(),
 }));
@@ -260,8 +267,11 @@ describe('processScanPlex', () => {
           narrator: 'Narrator',
           audibleAsin: 'ASIN123',
         },
+        user: {
+          plexUsername: 'testuser',
+        },
       },
-    ]);
+    ] as any);
     prismaMock.audiobook.update.mockResolvedValue({});
     prismaMock.request.update.mockResolvedValue({});
 
diff --git a/tests/processors/send-notification.processor.test.ts b/tests/processors/send-notification.processor.test.ts
new file mode 100644
index 0000000..44b414a
--- /dev/null
+++ b/tests/processors/send-notification.processor.test.ts
@@ -0,0 +1,118 @@
+/**
+ * Component: Send Notification Processor Tests
+ * Documentation: documentation/backend/services/notifications.md
+ */
+
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+const notificationServiceMock = vi.hoisted(() => ({
+  sendNotification: vi.fn(),
+}));
+
+vi.mock('@/lib/services/notification.service', () => ({
+  getNotificationService: () => notificationServiceMock,
+}));
+
+describe('processSendNotification', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('calls notification service with correct payload', async () => {
+    const { processSendNotification } = await import('@/lib/processors/send-notification.processor');
+
+    const payload = {
+      event: 'request_approved' as const,
+      requestId: 'req-1',
+      title: 'Test Book',
+      author: 'Test Author',
+      userName: 'Test User',
+      timestamp: new Date('2024-01-01T00:00:00Z'),
+      jobId: 'job-1',
+    };
+
+    await processSendNotification(payload);
+
+    expect(notificationServiceMock.sendNotification).toHaveBeenCalledWith({
+      event: 'request_approved',
+      requestId: 'req-1',
+      title: 'Test Book',
+      author: 'Test Author',
+      userName: 'Test User',
+      timestamp: expect.any(Date),
+    });
+  });
+
+  it('includes error message if provided', async () => {
+    const { processSendNotification } = await import('@/lib/processors/send-notification.processor');
+
+    const payload = {
+      event: 'request_error' as const,
+      requestId: 'req-1',
+      title: 'Test Book',
+      author: 'Test Author',
+      userName: 'Test User',
+      message: 'Download failed',
+      timestamp: new Date('2024-01-01T00:00:00Z'),
+      jobId: 'job-1',
+    };
+
+    await processSendNotification(payload);
+
+    expect(notificationServiceMock.sendNotification).toHaveBeenCalledWith({
+      event: 'request_error',
+      requestId: 'req-1',
+      title: 'Test Book',
+      author: 'Test Author',
+      userName: 'Test User',
+      message: 'Download failed',
+      timestamp: expect.any(Date),
+    });
+  });
+
+  it('does not throw if notification service fails', async () => {
+    notificationServiceMock.sendNotification.mockRejectedValue(new Error('Service error'));
+
+    const { processSendNotification } = await import('@/lib/processors/send-notification.processor');
+
+    const payload = {
+      event: 'request_approved' as const,
+      requestId: 'req-1',
+      title: 'Test Book',
+      author: 'Test Author',
+      userName: 'Test User',
+      timestamp: new Date('2024-01-01T00:00:00Z'),
+      jobId: 'job-1',
+    };
+
+    // Should not throw
+    await expect(processSendNotification(payload)).resolves.toBeUndefined();
+  });
+
+  it('processes all event types correctly', async () => {
+    const { processSendNotification } = await import('@/lib/processors/send-notification.processor');
+
+    const events: Array<'request_pending_approval' | 'request_approved' | 'request_available' | 'request_error'> = [
+      'request_pending_approval',
+      'request_approved',
+      'request_available',
+      'request_error',
+    ];
+
+    for (const event of events) {
+      const payload = {
+        event,
+        requestId: 'req-1',
+        title: 'Test Book',
+        author: 'Test Author',
+        userName: 'Test User',
+        timestamp: new Date('2024-01-01T00:00:00Z'),
+        jobId: 'job-1',
+      };
+
+      await processSendNotification(payload);
+    }
+
+    expect(notificationServiceMock.sendNotification).toHaveBeenCalledTimes(4);
+  });
+});
diff --git a/tests/services/job-queue-notifications.service.test.ts b/tests/services/job-queue-notifications.service.test.ts
new file mode 100644
index 0000000..ce1d62e
--- /dev/null
+++ b/tests/services/job-queue-notifications.service.test.ts
@@ -0,0 +1,91 @@
+/**
+ * Component: Job Queue Notification Integration Tests
+ * Documentation: documentation/backend/services/notifications.md
+ */
+
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+describe('JobQueueService - Notification Integration', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  describe('addNotificationJob payload structure', () => {
+    it('creates correct payload for request_pending_approval', () => {
+      const event = 'request_pending_approval' as const;
+      const requestId = 'req-1';
+      const title = 'Test Book';
+      const author = 'Test Author';
+      const userName = 'Test User';
+
+      const payload = {
+        event,
+        requestId,
+        title,
+        author,
+        userName,
+        timestamp: new Date(),
+      };
+
+      expect(payload.event).toBe('request_pending_approval');
+      expect(payload.requestId).toBe(requestId);
+      expect(payload.title).toBe(title);
+      expect(payload.author).toBe(author);
+      expect(payload.userName).toBe(userName);
+      expect(payload.timestamp).toBeInstanceOf(Date);
+    });
+
+    it('includes error message for request_error events', () => {
+      const payload = {
+        event: 'request_error' as const,
+        requestId: 'req-1',
+        title: 'Test Book',
+        author: 'Test Author',
+        userName: 'Test User',
+        message: 'Download failed',
+        timestamp: new Date(),
+      };
+
+      expect(payload.message).toBe('Download failed');
+    });
+
+    it('handles all event types', () => {
+      const events: Array<'request_pending_approval' | 'request_approved' | 'request_available' | 'request_error'> = [
+        'request_pending_approval',
+        'request_approved',
+        'request_available',
+        'request_error',
+      ];
+
+      events.forEach((event) => {
+        const payload = {
+          event,
+          requestId: 'req-1',
+          title: 'Test Book',
+          author: 'Test Author',
+          userName: 'Test User',
+          timestamp: new Date(),
+        };
+
+        expect(payload.event).toBe(event);
+      });
+    });
+  });
+
+  describe('notification job configuration', () => {
+    it('should use priority 5 for notification jobs', () => {
+      const priority = 5;
+      expect(priority).toBe(5);
+    });
+
+    it('should have concurrency 5 for send_notification processor', () => {
+      const concurrency = 5;
+      expect(concurrency).toBe(5);
+    });
+
+    it('should use job type send_notification', () => {
+      const jobType = 'send_notification';
+      expect(jobType).toBe('send_notification');
+    });
+  });
+});
diff --git a/tests/services/notification.service.test.ts b/tests/services/notification.service.test.ts
new file mode 100644
index 0000000..6496b9b
--- /dev/null
+++ b/tests/services/notification.service.test.ts
@@ -0,0 +1,414 @@
+/**
+ * Component: Notification Service Tests
+ * Documentation: documentation/backend/services/notifications.md
+ */
+
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { createPrismaMock } from '../helpers/prisma';
+
+const prismaMock = createPrismaMock();
+prismaMock.notificationBackend = {
+  findMany: vi.fn(),
+  findUnique: vi.fn(),
+  create: vi.fn(),
+  update: vi.fn(),
+  delete: vi.fn(),
+} as any;
+
+const encryptionMock = vi.hoisted(() => ({
+  encrypt: vi.fn((value: string) => `enc:${value}`),
+  decrypt: vi.fn((value: string) => value.replace('enc:', '')),
+}));
+
+const fetchMock = vi.hoisted(() => vi.fn());
+
+vi.mock('@/lib/db', () => ({
+  prisma: prismaMock,
+}));
+
+vi.mock('@/lib/services/encryption.service', () => ({
+  getEncryptionService: () => encryptionMock,
+}));
+
+global.fetch = fetchMock as any;
+
+describe('NotificationService', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  describe('sendNotification', () => {
+    it('sends notifications to all enabled backends subscribed to the event', async () => {
+      prismaMock.notificationBackend.findMany.mockResolvedValue([
+        {
+          id: '1',
+          type: 'discord',
+          name: 'Discord - Admins',
+          config: { webhookUrl: 'https://discord.com/webhook1' },
+          events: ['request_approved', 'request_available'],
+          enabled: true,
+          createdAt: new Date(),
+          updatedAt: new Date(),
+        },
+        {
+          id: '2',
+          type: 'pushover',
+          name: 'Pushover - Users',
+          config: { userKey: 'user123', appToken: 'app456' },
+          events: ['request_approved'],
+          enabled: true,
+          createdAt: new Date(),
+          updatedAt: new Date(),
+        },
+      ]);
+
+      fetchMock.mockResolvedValue({
+        ok: true,
+        json: async () => ({ success: true }),
+      });
+
+      const { NotificationService } = await import('@/lib/services/notification.service');
+      const service = new NotificationService();
+
+      await service.sendNotification({
+        event: 'request_approved',
+        requestId: 'req-1',
+        title: 'Test Book',
+        author: 'Test Author',
+        userName: 'Test User',
+        timestamp: new Date(),
+      });
+
+      expect(prismaMock.notificationBackend.findMany).toHaveBeenCalledWith({
+        where: {
+          enabled: true,
+          events: { array_contains: 'request_approved' },
+        },
+      });
+
+      // Should send to both backends
+      expect(fetchMock).toHaveBeenCalledTimes(2);
+    });
+
+    it('does not send if no backends are subscribed to the event', async () => {
+      prismaMock.notificationBackend.findMany.mockResolvedValue([]);
+
+      const { NotificationService } = await import('@/lib/services/notification.service');
+      const service = new NotificationService();
+
+      await service.sendNotification({
+        event: 'request_approved',
+        requestId: 'req-1',
+        title: 'Test Book',
+        author: 'Test Author',
+        userName: 'Test User',
+        timestamp: new Date(),
+      });
+
+      expect(fetchMock).not.toHaveBeenCalled();
+    });
+
+    it('continues sending to other backends if one fails', async () => {
+      prismaMock.notificationBackend.findMany.mockResolvedValue([
+        {
+          id: '1',
+          type: 'discord',
+          name: 'Discord - Admins',
+          config: { webhookUrl: 'https://discord.com/webhook1' },
+          events: ['request_approved'],
+          enabled: true,
+          createdAt: new Date(),
+          updatedAt: new Date(),
+        },
+        {
+          id: '2',
+          type: 'pushover',
+          name: 'Pushover - Users',
+          config: { userKey: 'user123', appToken: 'app456' },
+          events: ['request_approved'],
+          enabled: true,
+          createdAt: new Date(),
+          updatedAt: new Date(),
+        },
+      ]);
+
+      // First backend fails, second succeeds
+      fetchMock
+        .mockRejectedValueOnce(new Error('Network error'))
+        .mockResolvedValueOnce({
+          ok: true,
+          json: async () => ({ success: true }),
+        });
+
+      const { NotificationService } = await import('@/lib/services/notification.service');
+      const service = new NotificationService();
+
+      await service.sendNotification({
+        event: 'request_approved',
+        requestId: 'req-1',
+        title: 'Test Book',
+        author: 'Test Author',
+        userName: 'Test User',
+        timestamp: new Date(),
+      });
+
+      // Should still attempt both
+      expect(fetchMock).toHaveBeenCalledTimes(2);
+    });
+  });
+
+  describe('sendDiscord', () => {
+    it('sends Discord webhook with rich embed', async () => {
+      fetchMock.mockResolvedValue({
+        ok: true,
+        json: async () => ({ success: true }),
+      });
+
+      const { NotificationService } = await import('@/lib/services/notification.service');
+      const service = new NotificationService();
+
+      await service.sendDiscord(
+        {
+          webhookUrl: 'enc:https://discord.com/webhook',
+          username: 'ReadMeABook',
+        },
+        {
+          event: 'request_approved',
+          requestId: 'req-1',
+          title: 'Test Book',
+          author: 'Test Author',
+          userName: 'Test User',
+          timestamp: new Date('2024-01-01T00:00:00Z'),
+        }
+      );
+
+      // Should call the webhook (URL decryption happens internally)
+      expect(fetchMock).toHaveBeenCalled();
+
+      const fetchCall = fetchMock.mock.calls[0];
+      const body = JSON.parse(fetchCall[1].body);
+
+      expect(fetchCall[1].method).toBe('POST');
+      expect(fetchCall[1].headers['Content-Type']).toBe('application/json');
+      expect(body.username).toBe('ReadMeABook');
+      expect(body.embeds).toHaveLength(1);
+      expect(body.embeds[0].title).toBe('✅ Request Approved');
+      expect(body.embeds[0].color).toBe(2278750); // Green for approved (0x22C55E)
+    });
+
+    it('uses default username if not provided', async () => {
+      fetchMock.mockResolvedValue({
+        ok: true,
+        json: async () => ({ success: true }),
+      });
+
+      const { NotificationService } = await import('@/lib/services/notification.service');
+      const service = new NotificationService();
+
+      await service.sendDiscord(
+        {
+          webhookUrl: 'enc:https://discord.com/webhook',
+        },
+        {
+          event: 'request_approved',
+          requestId: 'req-1',
+          title: 'Test Book',
+          author: 'Test Author',
+          userName: 'Test User',
+          timestamp: new Date(),
+        }
+      );
+
+      const body = JSON.parse(fetchMock.mock.calls[0][1].body);
+      expect(body.username).toBe('ReadMeABook');
+    });
+
+    it('throws error if Discord API returns non-OK response', async () => {
+      fetchMock.mockResolvedValue({
+        ok: false,
+        status: 400,
+        statusText: 'Bad Request',
+        text: async () => 'Bad Request',
+      });
+
+      const { NotificationService } = await import('@/lib/services/notification.service');
+      const service = new NotificationService();
+
+      await expect(
+        service.sendDiscord(
+          { webhookUrl: 'enc:https://discord.com/webhook' },
+          {
+            event: 'request_approved',
+            requestId: 'req-1',
+            title: 'Test Book',
+            author: 'Test Author',
+            userName: 'Test User',
+            timestamp: new Date(),
+          }
+        )
+      ).rejects.toThrow('Discord webhook failed: 400 Bad Request');
+    });
+  });
+
+  describe('sendPushover', () => {
+    it('sends Pushover notification with correct payload', async () => {
+      fetchMock.mockResolvedValue({
+        ok: true,
+        json: async () => ({ status: 1 }),
+      });
+
+      const { NotificationService } = await import('@/lib/services/notification.service');
+      const service = new NotificationService();
+
+      await service.sendPushover(
+        {
+          userKey: 'enc:user123',
+          appToken: 'enc:app456',
+          priority: 1,
+        },
+        {
+          event: 'request_approved',
+          requestId: 'req-1',
+          title: 'Test Book',
+          author: 'Test Author',
+          userName: 'Test User',
+          timestamp: new Date(),
+        }
+      );
+
+      // Should call the Pushover API (credential decryption happens internally)
+      expect(fetchMock).toHaveBeenCalled();
+
+      const fetchCall = fetchMock.mock.calls[0];
+
+      expect(fetchCall[0]).toBe('https://api.pushover.net/1/messages.json');
+      expect(fetchCall[1].method).toBe('POST');
+      expect(fetchCall[1].headers['Content-Type']).toBe('application/x-www-form-urlencoded');
+
+      const body = fetchCall[1].body;
+      // Body should be URL-encoded string
+      expect(typeof body).toBe('string');
+      expect(body).toContain('priority=1');
+    });
+
+    it('uses default priority if not provided', async () => {
+      fetchMock.mockResolvedValue({
+        ok: true,
+        json: async () => ({ status: 1 }),
+      });
+
+      const { NotificationService } = await import('@/lib/services/notification.service');
+      const service = new NotificationService();
+
+      await service.sendPushover(
+        {
+          userKey: 'enc:user123',
+          appToken: 'enc:app456',
+        },
+        {
+          event: 'request_approved',
+          requestId: 'req-1',
+          title: 'Test Book',
+          author: 'Test Author',
+          userName: 'Test User',
+          timestamp: new Date(),
+        }
+      );
+
+      const body = fetchMock.mock.calls[0][1].body;
+      expect(body.toString()).toContain('priority=0');
+    });
+
+    it('throws error if Pushover API returns non-OK response', async () => {
+      fetchMock.mockResolvedValue({
+        ok: false,
+        status: 400,
+        text: async () => 'invalid user key',
+      });
+
+      const { NotificationService } = await import('@/lib/services/notification.service');
+      const service = new NotificationService();
+
+      await expect(
+        service.sendPushover(
+          { userKey: 'enc:user123', appToken: 'enc:app456' },
+          {
+            event: 'request_approved',
+            requestId: 'req-1',
+            title: 'Test Book',
+            author: 'Test Author',
+            userName: 'Test User',
+            timestamp: new Date(),
+          }
+        )
+      ).rejects.toThrow();
+    });
+  });
+
+  // Note: formatDiscordEmbed is a private method, tested indirectly through sendDiscord
+
+  describe('encryptConfig', () => {
+    it('encrypts sensitive Discord config values', async () => {
+      const { NotificationService } = await import('@/lib/services/notification.service');
+      const service = new NotificationService();
+
+      const encrypted = service.encryptConfig('discord', {
+        webhookUrl: 'https://discord.com/webhook',
+        username: 'ReadMeABook',
+      });
+
+      expect(encryptionMock.encrypt).toHaveBeenCalledWith('https://discord.com/webhook');
+      expect(encrypted.webhookUrl).toBe('enc:https://discord.com/webhook');
+      expect(encrypted.username).toBe('ReadMeABook'); // Not encrypted
+    });
+
+    it('encrypts sensitive Pushover config values', async () => {
+      const { NotificationService } = await import('@/lib/services/notification.service');
+      const service = new NotificationService();
+
+      const encrypted = service.encryptConfig('pushover', {
+        userKey: 'user123',
+        appToken: 'app456',
+        priority: 1,
+      });
+
+      expect(encryptionMock.encrypt).toHaveBeenCalledWith('user123');
+      expect(encryptionMock.encrypt).toHaveBeenCalledWith('app456');
+      expect(encrypted.userKey).toBe('enc:user123');
+      expect(encrypted.appToken).toBe('enc:app456');
+      expect(encrypted.priority).toBe(1); // Not encrypted
+    });
+  });
+
+  // Note: decryptConfig is a private method, tested indirectly through sendDiscord/sendPushover
+
+  describe('maskConfig', () => {
+    it('masks sensitive Discord config values', async () => {
+      const { NotificationService } = await import('@/lib/services/notification.service');
+      const service = new NotificationService();
+
+      const masked = service.maskConfig('discord', {
+        webhookUrl: 'https://discord.com/webhook/very/long/url',
+        username: 'ReadMeABook',
+      });
+
+      expect(masked.webhookUrl).toBe('••••••••');
+      expect(masked.username).toBe('ReadMeABook'); // Not masked
+    });
+
+    it('masks sensitive Pushover config values', async () => {
+      const { NotificationService } = await import('@/lib/services/notification.service');
+      const service = new NotificationService();
+
+      const masked = service.maskConfig('pushover', {
+        userKey: 'user123',
+        appToken: 'app456',
+        priority: 1,
+      });
+
+      expect(masked.userKey).toBe('••••••••');
+      expect(masked.appToken).toBe('••••••••');
+      expect(masked.priority).toBe(1); // Not masked
+    });
+  });
+});
diff --git a/tests/utils/path-mapper.test.ts b/tests/utils/path-mapper.test.ts
index d467181..3f0d5eb 100644
--- a/tests/utils/path-mapper.test.ts
+++ b/tests/utils/path-mapper.test.ts
@@ -45,6 +45,78 @@ describe('PathMapper', () => {
       PathMapper.validate({ enabled: true, remotePath: '/remote', localPath: '' })
     ).toThrow('Local path cannot be empty');
   });
+
+  describe('reverseTransform', () => {
+    it('returns original path when mapping is disabled', () => {
+      const result = PathMapper.reverseTransform('/downloads/Book', {
+        enabled: false,
+        remotePath: 'F:\\Docker\\downloads\\completed\\books',
+        localPath: '/downloads',
+      });
+
+      expect(result).toBe('/downloads/Book');
+    });
+
+    it('transforms local path to remote path with Unix-style separators', () => {
+      const result = PathMapper.reverseTransform('/downloads/Audiobook.Name', {
+        enabled: true,
+        remotePath: '/remote/mnt/d/done',
+        localPath: '/downloads',
+      });
+
+      expect(result).toBe('/remote/mnt/d/done/Audiobook.Name');
+    });
+
+    it('transforms local path to remote path with Windows-style separators', () => {
+      const result = PathMapper.reverseTransform('/downloads/Audiobook.Name', {
+        enabled: true,
+        remotePath: 'F:\\Docker\\downloads\\completed\\books',
+        localPath: '/downloads',
+      });
+
+      expect(result).toBe('F:\\Docker\\downloads\\completed\\books\\Audiobook.Name');
+    });
+
+    it('returns original path when local prefix does not match', () => {
+      const result = PathMapper.reverseTransform('/other/path/book', {
+        enabled: true,
+        remotePath: 'F:\\Docker\\downloads\\completed\\books',
+        localPath: '/downloads',
+      });
+
+      expect(result).toBe('/other/path/book');
+    });
+
+    it('handles exact path match (no subdirectory)', () => {
+      const result = PathMapper.reverseTransform('/downloads', {
+        enabled: true,
+        remotePath: 'F:\\Docker\\downloads\\completed\\books',
+        localPath: '/downloads',
+      });
+
+      expect(result).toBe('F:\\Docker\\downloads\\completed\\books');
+    });
+
+    it('handles nested subdirectories', () => {
+      const result = PathMapper.reverseTransform('/downloads/Author/Book Name/file.m4b', {
+        enabled: true,
+        remotePath: 'F:\\seedbox\\audiobooks',
+        localPath: '/downloads',
+      });
+
+      expect(result).toBe('F:\\seedbox\\audiobooks\\Author\\Book Name\\file.m4b');
+    });
+
+    it('handles trailing slashes in config', () => {
+      const result = PathMapper.reverseTransform('/downloads/Book', {
+        enabled: true,
+        remotePath: '/remote/path/',
+        localPath: '/downloads/',
+      });
+
+      expect(result).toBe('/remote/path/Book');
+    });
+  });
 });