* feat(auth): migrate auth token to HttpOnly cookie & implement WebSocket Origin whitelist
Security improvements from the MUL-566 audit report:
1. Auth token is now set as an HttpOnly, SameSite=Lax cookie on login,
preventing XSS-based token theft. Cookie-based auth includes CSRF
protection via double-submit cookie pattern. The Authorization header
path is preserved for Electron desktop app and CLI/PAT clients.
2. WebSocket upgrader now validates the Origin header against a
configurable allowlist (ALLOWED_ORIGINS env var), rejecting
connections from unauthorized origins.
Backend: new auth cookie helpers, middleware reads cookie as fallback,
WS handler accepts cookie auth, Origin whitelist, logout endpoint.
Frontend: CSRF token in API headers, cookie-aware auth store and WS
client, web app opts into cookieAuth mode while desktop keeps tokens.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix(auth): address PR review — Strict cookies, HMAC-bound CSRF, origin sync
1. SameSite=Lax → SameSite=Strict per spec requirement
2. CSRF token now HMAC-signed with auth token (nonce.signature format),
preventing subdomain cookie injection attacks
3. allowedWSOrigins uses atomic.Value to eliminate data race
4. Removed magic "cookie" sentinel string in WSProvider — pass null token
and guard with boolean check instead
5. Removed dead delete uploadHeaders["Content-Type"] in API client
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* feat(storage): add local file storage fallback
- Add local storage implementation for file uploads
- Update .env.example with LOCAL_UPLOAD_DIR and LOCAL_UPLOAD_BASE_URL
- Integrate local storage into server router and handlers
- Add storage abstraction layer with util functions
* ♻️ refactor(storage): improve path handling and file serving
switch from path to filepath for better cross-platform support and replace manual file serving logic with http.ServeFile to enhance security against path traversal. update unit tests to use t.Setenv for cleaner environment variable management.
* fix(auth): log email send errors and gracefully degrade in non-production
In non-production environments (APP_ENV != "production"), if sending the
verification code email fails, log the error as a warning and still return
success. This lets self-hosting users log in with the master code (888888)
even when their Resend configuration is incomplete (e.g. unverified from-domain).
In production, the behavior is unchanged — email failures return 500.
Also adds guidance in .env.example about RESEND_FROM_EMAIL for self-hosters.
Closes#723
* fix(auth): remove APP_ENV degradation, keep error logging only
Remove the APP_ENV-based graceful degradation for email send failures
— it's risky if users forget to set APP_ENV=production. Instead, always
return 500 on email failure (safe for production) and rely on the error
log (slog.Error) with the actual Resend error for debugging.
Self-hosters who don't need real emails should leave RESEND_API_KEY empty
(codes print to stdout, master code 888888 works).
Support Google login that links to existing accounts by email.
When a user who registered via email OTP signs in with Google using
the same email, they are linked to the same account.
Backend:
- Add POST /auth/google endpoint that exchanges Google auth code for
tokens, fetches user profile, and calls findOrCreateUser()
- Updates user name and avatar from Google profile on first Google login
Frontend:
- Add "Continue with Google" button on login page (shown when
NEXT_PUBLIC_GOOGLE_CLIENT_ID is configured)
- Add /auth/callback page to handle Google OAuth redirect
- Add loginWithGoogle to auth store and API client
- Load root .env in next.config.ts so REMOTE_API_URL is available
- Default fallback remains localhost:8080 (no impact on existing setups)
- Add REMOTE_API_URL to .env.example with documentation
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>
* feat(auth): add email verification login flow with 401 auto-redirect
Replace the old OAuth-based login with email verification codes:
- Backend: send-code / verify-code endpoints, verification_codes table (migration 009), rate limiting, Resend email service
- Frontend: two-step login UI (email → 6-digit OTP), auth store with sendCode/verifyCode
- SDK: ApiClient gains onUnauthorized callback; 401 responses auto-clear token and redirect to /login
- Fix login button staying disabled due to global isLoading state
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix(auth): add brute-force protection, redirect loop guard, and expired code cleanup
- VerifyCode: increment attempts on wrong code, reject after 5 failed tries (migration 010)
- onUnauthorized: skip redirect if already on /login to prevent infinite loops
- SendCode: best-effort cleanup of expired verification codes older than 1 hour
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* feat(auth): add master verification code for non-production environments
Allow code "888888" to bypass email verification in non-production
environments to simplify development and testing workflows.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* feat(auth): add personal access tokens for CLI and API authentication
Add full-stack PAT support: users create tokens in Settings, CLI authenticates
via `multica auth login`. Server stores SHA-256 hashes only. Auth middleware
extended to accept both JWTs and PATs (distinguished by `mul_` prefix).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Add .env.example with all supported provider env vars
(OpenAI, Anthropic, DeepSeek, Kimi, Groq, Mistral, Together, Google)
- Update README with environment setup instructions
- Document configuration priority and startup commands
- Whitelist .env.example in .gitignore
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
