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>

docker-compose.minio.yml

@@ -0,0 +1,64 @@
+# MinIO Object Storage for Task Reporter
+# Usage: docker-compose -f docker-compose.minio.yml up -d
+#
+# This configuration starts MinIO for local development.
+# Access MinIO Console at: http://localhost:9001
+# S3 API endpoint at: http://localhost:9000
+
+version: '3.8'
+
+services:
+  minio:
+    image: minio/minio:latest
+    container_name: task-reporter-minio
+    ports:
+      - "9000:9000"   # S3 API
+      - "9001:9001"   # MinIO Console
+    environment:
+      MINIO_ROOT_USER: minioadmin
+      MINIO_ROOT_PASSWORD: minioadmin
+    command: server /data --console-address ":9001"
+    volumes:
+      - minio_data:/data
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:9000/minio/health/live"]
+      interval: 30s
+      timeout: 20s
+      retries: 3
+    restart: unless-stopped
+
+volumes:
+  minio_data:
+    driver: local
+
+# ============================================================================
+# Quick Start Guide
+# ============================================================================
+#
+# 1. Start MinIO:
+#    docker-compose -f docker-compose.minio.yml up -d
+#
+# 2. Access MinIO Console:
+#    Open http://localhost:9001 in your browser
+#    Login: minioadmin / minioadmin
+#
+# 3. The application will automatically create the bucket on startup
+#    (configured as 'task-reporter-files' in .env)
+#
+# 4. Stop MinIO:
+#    docker-compose -f docker-compose.minio.yml down
+#
+# 5. Remove all data:
+#    docker-compose -f docker-compose.minio.yml down -v
+#
+# ============================================================================
+# Production Notes
+# ============================================================================
+#
+# For production deployment:
+# - Change MINIO_ROOT_USER and MINIO_ROOT_PASSWORD to secure values
+# - Use external volume or persistent storage
+# - Configure TLS/HTTPS
+# - Set up proper backup policies
+# - Consider MinIO distributed mode for high availability
+#