Implement file hash-based library matching and remove fuzzy ASIN matching

Adds file hash-based matching for Audiobookshelf library items to ensure 100% accurate ASIN assignment for RMAB-organized content. Removes fuzzy matching from library availability checks, making all matching ASIN-only to eliminate false positives and race conditions. Updates database schema, processors, and matcher utilities; adds new tests and documentation for the new matching strategy. Removes obsolete scripts, Dockerfile, and related tests; updates docker-compose for test environments.

tests/app/admin/components/ConfirmDialog.test.tsx

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+/**
+ * Component: Confirm Dialog Tests
+ * Documentation: documentation/frontend/components.md
+ */
+
+// @vitest-environment jsdom
+
+import React from 'react';
+import { fireEvent, render, screen } from '@testing-library/react';
+import { describe, expect, it, vi } from 'vitest';
+import { ConfirmDialog } from '@/app/admin/components/ConfirmDialog';
+
+describe('ConfirmDialog', () => {
+  it('renders nothing when closed', () => {
+    render(
+      <ConfirmDialog
+        isOpen={false}
+        title="Delete"
+        message="Confirm?"
+        onConfirm={vi.fn()}
+        onCancel={vi.fn()}
+      />
+    );
+
+    expect(screen.queryByText('Delete')).not.toBeInTheDocument();
+  });
+
+  it('invokes confirm and cancel actions', () => {
+    const onConfirm = vi.fn();
+    const onCancel = vi.fn();
+
+    const { container } = render(
+      <ConfirmDialog
+        isOpen
+        title="Delete"
+        message="Confirm?"
+        onConfirm={onConfirm}
+        onCancel={onCancel}
+      />
+    );
+
+    fireEvent.click(screen.getByRole('button', { name: 'Confirm' }));
+    expect(onConfirm).toHaveBeenCalledTimes(1);
+
+    fireEvent.click(screen.getByRole('button', { name: 'Cancel' }));
+    expect(onCancel).toHaveBeenCalledTimes(1);
+
+    const backdrop = container.querySelector('[aria-hidden="true"]');
+    expect(backdrop).not.toBeNull();
+    if (backdrop) {
+      fireEvent.click(backdrop);
+    }
+    expect(onCancel).toHaveBeenCalledTimes(2);
+  });
+});