2 commits

Author	SHA1	Message	Date
yushen	edf4c00c08	fix(upload): add file type/size validation, Content-Disposition header ... - Add content type allowlist (images, PDF, text, video, audio, zip) - Enforce 10 MB upload limit via http.MaxBytesReader - Set Content-Disposition on S3 objects for proper download filenames - Remove unused CloudFrontSigner.Domain() method Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>	2026-03-31 14:55:27 +08:00
yushen	29a80e057e	feat(upload): add file upload API with S3 + CloudFront signed cookies ... Add POST /api/upload-file endpoint that uploads files to S3 and returns CDN URLs protected by CloudFront signed cookies (same pattern as Linear). Infrastructure: - Two private S3 buckets (static.multica.ai, static-staging.multica.ai) - Two CloudFront distributions with OAC and Trusted Key Groups - ACM wildcard cert in us-east-1, DNS records in Route 53 - RSA signing key stored in AWS Secrets Manager Backend: - S3 storage service with CloudFront CDN domain support - CloudFront signed cookie generation (RSA-SHA1) - Private key loaded from Secrets Manager (env var fallback for local dev) - Cookies set on login (VerifyCode) with 72h expiry matching JWT - Upload handler: multipart form → S3 → CloudFront URL response Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>	2026-03-31 14:41:17 +08:00