Add locked user fixture (user18, status=3) and test that both disabled
and locked users are rejected across all auth paths: API tokens,
CalDAV basic auth, CheckUserCredentials.
Ref: GHSA-94xm-jj8x-3cr4
checkAPITokenAndPutItInContext now returns 401 Unauthorized when the
token owner's account is disabled or locked, instead of a 500 error.
Also fixes the API token test to match the actual middleware behavior.
- Login creates a server-side session and sets an HttpOnly refresh
token cookie alongside the short-lived JWT
- POST /user/token/refresh exchanges the cookie for a new JWT and
rotates the refresh token atomically
- POST /user/logout destroys the session and clears the cookie
- POST /user/token restricted to link share tokens only
- Session list (GET) and delete (DELETE) routes for /user/sessions
- All user sessions invalidated on password change and reset
- CORS configured to allow credentials for cross-origin cookies
- JWT 401 responses use structured error code 11 for client detection
- Refresh token cookie name constants annotated for gosec G101
- Renames the `/tasks/all` endpoint to `/tasks` for consistency with
other collection endpoints like `/projects` and `/labels`
- Returns `[]` instead of `null` for empty pagination results across all
list endpoints
- Updates the frontend service to use the new endpoint path
- Updates API token tests to use the new endpoint path
Fixes#1984
