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>

.env.example

@@ -0,0 +1,23 @@
+# Database Configuration
+DATABASE_URL=postgresql://dev:dev123@localhost:5432/task_reporter
+# For development with SQLite (comment out DATABASE_URL above and use this):
+# DATABASE_URL=sqlite:///./task_reporter.db
+
+# Security
+FERNET_KEY=  # Generate with: python -c "from cryptography.fernet import Fernet; print(Fernet.generate_key().decode())"
+
+# AD API
+AD_API_URL=https://pj-auth-api.vercel.app/api/auth/login
+
+# Session Settings
+SESSION_INACTIVITY_DAYS=3
+TOKEN_REFRESH_THRESHOLD_MINUTES=5
+MAX_REFRESH_ATTEMPTS=3
+
+# MinIO Object Storage Configuration
+# For local development, use docker-compose.minio.yml to start MinIO
+MINIO_ENDPOINT=localhost:9000
+MINIO_ACCESS_KEY=minioadmin
+MINIO_SECRET_KEY=minioadmin
+MINIO_BUCKET=task-reporter-files
+MINIO_SECURE=false  # Set to true for HTTPS in production