feat: Add 'Store for Later' async file transfer mode - #45
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- Backend: S3-compatible storage with aws-sdk-s3
- Endpoints: POST/GET /api/store/{blob_id}, GET /api/store/{blob_id}/meta
- Rate limiting: 10 uploads/hour, 60 reads/hour per IP (in-memory)
- Hourly cleanup task for expired blobs (24h TTL)
- Frontend: New 'Store for Later' tab with age-encryption
- 4-word diceware passphrase generation (EFF wordlist)
- QR code generation for shareable links
- Blob ID derived via SHA-256(passphrase)
Config: S3_ENDPOINT, S3_BUCKET, S3_REGION, STORE_MAX_SIZE, STORE_TTL_HOURS
Known: Rate limiter is in-memory (needs Redis for multi-instance)
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Summary
Adds a new "Store for Later" mode for async file transfers. Senders can upload E2E encrypted files to S3-compatible storage and share them via passphrase or QR code link. Recipients can download anytime within 24 hours.
Changes
Backend (Rust/Axum):
POST /api/store/{blob_id},GET /api/store/{blob_id},GET /api/store/{blob_id}/metaS3_ENDPOINT,S3_BUCKET,S3_REGION,STORE_MAX_SIZE,STORE_TTL_HOURSFrontend (Vanilla JS):
Configuration
Requires S3-compatible storage:
S3_ENDPOINT=https://... S3_BUCKET=... S3_REGION=auto STORE_MAX_SIZE=104857600 # 100MB default STORE_TTL_HOURS=24Known Issues
Testing
Manual testing recommended: