TradingAgents/frontend
MarkLo127 42b5b8dab8 Implement Plan C3: Cloud Sync Retry with Local Caching
Features:
- Add cloud sync retry service for failed report uploads
- Automatic retry loop that runs every 30 seconds
- Exponential backoff: 1 attempt per 30s with max 5 retries per report
- Reports always saved locally (IndexedDB) - cloud sync failures don't block user
- SyncInitializer component starts retry loop on app startup

Changes:
- frontend/lib/sync-retry.ts: New service for managing cloud sync retries
  - retryPendingSyncs(): Attempt to sync all pending reports
  - markForRetry(): Mark a report for retry
  - startRetryLoop(): Start automatic retry background task
  - stopRetryLoop(): Clean up retry loop on app shutdown
  - getPendingSyncCount(): Get number of reports awaiting sync

- frontend/components/providers/SyncInitializer.tsx: Client component that:
  - Initializes retry loop only when user is authenticated
  - Cleans up on component unmount
  - Logs retry service startup/shutdown

- frontend/app/layout.tsx: Add SyncInitializer to root layout
  - Ensure retry loop starts automatically for authenticated users

- frontend/app/analysis/page.tsx: Improve error handling
  - Log warning when cloud sync fails
  - Report remains safely in IndexedDB even if cloud save fails

Impact:
- Reports never get lost even if cloud save fails temporarily
- Automatic retry ensures eventual consistency with cloud
- User experience improved: no more "report deleted" after 1 hour
- Network issues no longer result in data loss
- Addresses original issue: reports now persists locally indefinitely

Technical Design:
- Retry tracking uses in-memory Map (resets on page refresh)
- Future enhancement: could persist retry state to localStorage
- Cloud sync becomes eventual consistency rather than immediate

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
2026-03-12 21:35:29 +08:00
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app Implement Plan C3: Cloud Sync Retry with Local Caching 2026-03-12 21:35:29 +08:00
components Implement Plan C3: Cloud Sync Retry with Local Caching 2026-03-12 21:35:29 +08:00
context 2025-12-12 19:01:49 +08:00
contexts 2026-01-27 13:22:52 +08:00
hooks 2025-12-17 05:41:30 +08:00
lib Implement Plan C3: Cloud Sync Retry with Local Caching 2026-03-12 21:35:29 +08:00
public 2025-12-21 02:00:38 +08:00
.dockerignore 2025-12-12 05:43:08 +08:00
.gitignore 2025-11-20 21:56:47 +08:00
Dockerfile Replace next.config.ts rewrites with catch-all API proxy route 2026-03-12 11:37:12 +08:00
Dockerfile.railway 2026-03-11 16:56:32 +08:00
bun.lock 2026-03-10 19:07:11 +08:00
components.json 2025-11-20 21:56:47 +08:00
eslint.config.mjs 2025-12-12 05:57:55 +08:00
next.config.ts Replace next.config.ts rewrites with catch-all API proxy route 2026-03-12 11:37:12 +08:00
package.json 2026-03-10 18:58:03 +08:00
postcss.config.mjs 2025-11-20 21:56:47 +08:00
tsconfig.json 2025-11-20 21:56:47 +08:00