Add notification system with admin UI and backend

Introduces a full notification system with support for Discord and Pushover backends, event triggers, and message formatting. Adds backend services, processors, and API endpoints for managing notifications, as well as a new Notifications tab in the admin settings UI. Updates documentation, database schema, and tests to cover notification features and approval workflow improvements. Also changes project license from MIT to AGPL v3.

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;
     }
   }