feat(sentry): Implement Sentry Tunnel to avoid local network permission dialog

- Add /api/sentry-tunnel API Route (Next.js)
- Update sentry.client.config.ts with tunnel option
- Re-enable NEXT_PUBLIC_SENTRY_DSN in CI/CD workflows

Resolves: #45 Sentry Tunnel
See: feedback_sentry_local_network.md

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.github/workflows/ci.yaml

@@ -148,9 +148,8 @@ jobs:
       - name: Build packages
         env:
           NEXT_PUBLIC_API_URL: https://awoooi.wooo.work
-          # 暫時停用前端 Sentry (會觸發區域網路權限對話框)
-          # TODO: 實作 Sentry Tunnel 後再啟用
-          # NEXT_PUBLIC_SENTRY_DSN: http://da02d4e5d6542e4d1ed6b2dd6542efeb@192.168.0.110:9000/2
+          # Sentry DSN (透過 /api/sentry-tunnel 避免區域網路權限問題)
+          NEXT_PUBLIC_SENTRY_DSN: http://da02d4e5d6542e4d1ed6b2dd6542efeb@192.168.0.110:9000/2
         run: pnpm turbo build
 
       - name: Upload build artifacts