feat: Initial commit - Task Reporter incident response system
Complete implementation of the production line incident response system (生產線異常即時反應系統) including: Backend (FastAPI): - User authentication with AD integration and session management - Chat room management (create, list, update, members, roles) - Real-time messaging via WebSocket (typing indicators, reactions) - File storage with MinIO (upload, download, image preview) Frontend (React + Vite): - Authentication flow with token management - Room list with filtering, search, and pagination - Real-time chat interface with WebSocket - File upload with drag-and-drop and image preview - Member management and room settings - Breadcrumb navigation - 53 unit tests (Vitest) Specifications: - authentication: AD auth, sessions, JWT tokens - chat-room: rooms, members, templates - realtime-messaging: WebSocket, messages, reactions - file-storage: MinIO integration, file management - frontend-core: React SPA structure 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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# Authentication Capability
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## ADDED Requirements
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### Requirement: User Login with Dual-Token Session Management
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The system SHALL authenticate users by forwarding credentials to the Panjit AD authentication API (https://pj-auth-api.vercel.app/api/auth/login). Upon successful AD authentication, the system SHALL generate its own internal session token (separate from the AD token), encrypt the user's password using AES-256 encryption (for auto-refresh capability), and store all session data in the database. The internal token is returned to the client for subsequent requests.
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#### Scenario: Successful login with valid credentials
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- **WHEN** a user submits username "ymirliu@panjit.com.tw" and password "4RFV5tgb6yhn" to `POST /api/auth/login`
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- **THEN** the system SHALL forward the credentials to the AD API
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- **AND** receive a 200 response with `token` and `username` fields
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- **AND** encrypt the password using Fernet symmetric encryption (AES-256)
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- **AND** generate a unique internal session token (UUID4)
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- **AND** estimate or record the AD token expiry time (e.g., current_time + 1 hour)
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- **AND** create a session record in the `user_sessions` table with: username, display_name (from AD), internal_token, ad_token, encrypted_password, ad_token_expires_at, refresh_attempt_count (default 0), last_activity (current time), created_at
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- **AND** return status 200 with JSON body `{"token": "<internal_token>", "display_name": "<username>"}`
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#### Scenario: Password stored securely with encryption
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- **WHEN** a password is stored in the user_sessions table
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- **THEN** the system SHALL encrypt it using the Fernet encryption key from environment variable FERNET_KEY
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- **AND** the encrypted_password field SHALL contain ciphertext that differs from the plaintext
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- **AND** decrypting the ciphertext SHALL reproduce the original password exactly
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#### Scenario: Failed login with invalid credentials
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- **WHEN** a user submits incorrect username or password to `POST /api/auth/login`
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- **THEN** the system SHALL forward the credentials to the AD API
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- **AND** receive a non-200 response (e.g., 401 Unauthorized)
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- **AND** return status 401 to the client with error message `{"error": "Invalid credentials"}`
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- **AND** NOT create any session record in the database
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#### Scenario: AD API service unavailable
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- **WHEN** a user attempts to login but the AD API (https://pj-auth-api.vercel.app) is unreachable
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- **THEN** the system SHALL return status 503 with error message `{"error": "Authentication service unavailable"}`
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### Requirement: User Logout
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The system SHALL provide a logout endpoint that deletes the user's session record from the database.
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#### Scenario: Successful logout with valid internal token
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- **WHEN** an authenticated user sends `POST /api/auth/logout` with header `Authorization: Bearer <valid_internal_token>`
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- **THEN** the system SHALL delete the session record from the `user_sessions` table
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- **AND** return status 200 with `{"message": "Logout successful"}`
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#### Scenario: Logout without authentication token
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- **WHEN** a user sends `POST /api/auth/logout` without the Authorization header
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- **THEN** the system SHALL return status 401 with `{"error": "No authentication token provided"}`
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### Requirement: Automatic AD Token Refresh with Retry Limit
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The system SHALL automatically refresh the AD token before it expires (within 5 minutes of expiry) when the user makes any API request, using the encrypted password stored in the database. The system SHALL limit auto-refresh attempts to a maximum of 3 consecutive failures, after which the session is forcibly terminated (to handle cases where the AD password has been changed).
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#### Scenario: Auto-refresh AD token on protected route access
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- **WHEN** an authenticated user accesses a protected endpoint with a valid internal_token
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- **AND** the stored ad_token will expire in less than 5 minutes (ad_token_expires_at - now < 5 minutes)
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- **AND** refresh_attempt_count is less than 3
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- **THEN** the system SHALL decrypt the encrypted_password from the database
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- **AND** re-authenticate with the AD API using the decrypted password
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- **AND** if authentication succeeds: update ad_token, ad_token_expires_at, reset refresh_attempt_count to 0
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- **AND** update the last_activity timestamp
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- **AND** allow the request to proceed normally
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#### Scenario: No refresh needed for fresh AD token
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- **WHEN** an authenticated user accesses a protected endpoint with a valid internal_token
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- **AND** the stored ad_token will not expire within 5 minutes
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- **THEN** the system SHALL NOT call the AD API
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- **AND** update only the last_activity timestamp
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- **AND** allow the request to proceed
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#### Scenario: Auto-refresh fails but retry limit not reached
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- **WHEN** an authenticated user accesses a protected endpoint triggering auto-refresh
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- **AND** the AD API returns 401 (password invalid or changed)
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- **AND** refresh_attempt_count is 0, 1, or 2
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- **THEN** the system SHALL increment refresh_attempt_count by 1
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- **AND** log the failed refresh attempt with timestamp for audit
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- **AND** return status 401 with `{"error": "Token refresh failed. Please try again or re-login if issue persists."}`
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- **AND** keep the session record in the database
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#### Scenario: Auto-refresh fails 3 consecutive times - force logout
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- **WHEN** an authenticated user accesses a protected endpoint
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- **AND** refresh_attempt_count is already 2
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- **AND** the AD API returns 401 on the 3rd refresh attempt
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- **THEN** the system SHALL increment refresh_attempt_count to 3
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- **AND** delete the session record from the database
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- **AND** log the forced logout event with reason "Password may have been changed in AD"
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- **AND** return status 401 with `{"error": "Session terminated. Your password may have been changed. Please login again."}`
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#### Scenario: Session blocked due to previous 3 failed refresh attempts
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- **WHEN** an authenticated user accesses a protected endpoint
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- **AND** refresh_attempt_count is already 3 (from previous failed refreshes)
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- **THEN** the system SHALL delete the session record immediately
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- **AND** return status 401 with `{"error": "Session expired due to authentication failures. Please login again."}`
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### Requirement: 3-Day Inactivity Timeout
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The system SHALL automatically invalidate user sessions that have been inactive for more than 3 days (72 hours). Inactivity is measured by the last_activity timestamp, which is updated on every API request.
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#### Scenario: Reject request from inactive session
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- **WHEN** a user accesses a protected endpoint with an internal_token
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- **AND** the last_activity timestamp is more than 3 days (72 hours) in the past
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- **THEN** the system SHALL delete the session record from the database
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- **AND** return status 401 with `{"error": "Session expired due to inactivity. Please login again."}`
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#### Scenario: Active user maintains session across multiple days
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- **WHEN** a user logs in on Day 1
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- **AND** makes at least one API request every 2 days (Day 2, Day 4, Day 6, etc.)
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- **THEN** the system SHALL keep the session active indefinitely
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- **AND** update last_activity on each request
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- **AND** auto-refresh the AD token as needed
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### Requirement: Token-Based Authentication for Protected Routes
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The system SHALL validate internal session tokens for protected API endpoints by checking the `Authorization: Bearer <internal_token>` header against the user_sessions table, enforcing inactivity timeout and auto-refreshing AD tokens when necessary.
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#### Scenario: Access protected endpoint with valid active session
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- **WHEN** a request includes header `Authorization: Bearer <valid_internal_token>`
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- **AND** the session exists in user_sessions table
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- **AND** last_activity is within 3 days
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- **THEN** the system SHALL update last_activity to current time
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- **AND** check and refresh AD token if needed (per auto-refresh requirement)
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- **AND** allow the request to proceed with user identity available
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#### Scenario: Access protected endpoint with invalid internal token
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- **WHEN** a request includes an internal_token that does not exist in the user_sessions table
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- **THEN** the system SHALL return status 401 with `{"error": "Invalid or expired token"}`
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#### Scenario: Access protected endpoint without token
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- **WHEN** a request to a protected endpoint omits the Authorization header
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- **THEN** the system SHALL return status 401 with `{"error": "Authentication required"}`
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