What does this PR do?

Adds a full bulk file rename workflow for libraries that have file rename enabled, including preview, execution, status tracking, and coverage tests.

This PR includes:

• New backend bulk-rename service and repository to compute rename previews and execute renames across a library.
• New library endpoints for bulk rename:
  • GET /api/v1/libraries/:id/bulk-rename/preview
  • GET /api/v1/libraries/:id/bulk-rename/status
  • POST /api/v1/libraries/:id/bulk-rename/execute (SSE progress stream)
• New client Tools experience for Bulk Rename (library selection, preview table/cards, status filters, pagination, execution/cancel flow).
• Shared types and enums updates for bulk rename preview/progress payloads, notifications, and audit actions.
• New tests:
  • Server unit tests for bulk rename and rename utils behavior
  • End-to-end suite for bulk rename permutations and edge cases
  • Client unit tests for the new bulk rename composable and components
• Small compatibility fix in the UI code path (replaceAll replaced with regex-based replace).

Closes #121

How did you test this?

• git push -u origin BO-121-bulk-rename-books
  • Triggered pre-push pnpm run verify:fast
  • Result: passed (lint:check + typecheck)
• pnpm --filter server test -- src/modules/library/bulk-rename.service.test.ts src/modules/file-write/file-rename.service.test.ts
  • In this environment, Vitest resolved to the full server suite.
  • Result: 458 passed test files, 5428 passed tests.
• pnpm --filter client test:unit --run src/features/tools/composables/__tests__/useBulkRename.spec.ts src/features/tools/bulk-rename/components/__tests__/BulkRenameConfirmDialog.spec.ts src/features/tools/bulk-rename/components/__tests__/BulkRenameStatusBadge.spec.ts
  • Result: 3 passed test files, 35 passed tests.

Anything non-obvious in the diff?

• Bulk rename preview is cached per library for 60 seconds and invalidated before execution.
• Collision detection handles both:
  • Multiple books resolving to the same generated path, and
  • Generated paths already owned by a different book in storage metadata.
• Only one bulk rename run can execute per library at a time (runningLibraries guard).
• For watched libraries, the file watcher is stopped before execution and restarted after completion/failure to avoid event races.
• Execution progress is streamed via SSE; cancellation is handled on client abort/disconnect.

Checklist

• I've read through my own diff
• This PR was discussed in an issue and has maintainer approval (for new features)
• Lint and tests pass locally
• No unintended files included (build artifacts, .env, personal configs)