fix: schedule timezone bug + missing notifications + celery beat startup

- Timezone: compute_next_run now correctly interprets cron in the schedule's
  configured timezone (e.g., "0 8 * * *" with Asia/Shanghai = 8AM Beijing, not UTC)
- Notifications: agent_tasks now reuses pre-created execution records and calls
  notify_schedule_result on completion, so non-workflow agent schedules get
  DB notifications + Feishu webhook + Feishu app messages
- Duplicate execution: execute_agent_task accepts optional execution_id to reuse
  the record created by schedule_service instead of creating a second one
- Celery Beat: added to restart_backend_celery.ps1, stop_aiagent.ps1, and
  docker-compose.dev.yml; fixed repo-root path resolution in all PS1 scripts

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/startup-deploy/docker-compose.dev.yml

@@ -0,0 +1,89 @@
+services:
+  frontend:
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile.dev
+    ports:
+      - "8038:3000"
+    volumes:
+      - ./frontend:/app
+      - /app/node_modules
+    environment:
+      - VITE_API_URL=http://101.43.95.130:8037
+    # 注意：Vite环境变量需要在构建时设置，运行时修改需要重启容器
+    depends_on:
+      - backend
+    networks:
+      - aiagent-network
+
+  backend:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile.dev
+    ports:
+      - "8037:8000"
+    volumes:
+      - ./backend:/app
+    environment:
+      - DATABASE_URL=mysql+pymysql://root:!Rjb12191@gz-cynosdbmysql-grp-d26pzce5.sql.tencentcdb.com:24936/agent_db?charset=utf8mb4
+      - REDIS_URL=redis://redis:6379/0
+      - SECRET_KEY=dev-secret-key-change-in-production
+      - CORS_ORIGINS=http://localhost:3000,http://127.0.0.1:3000,http://localhost:8038,http://101.43.95.130:8038
+      - DEEPSEEK_API_KEY=sk-fdf7cc1c73504e628ec0119b7e11b8cc
+      - DEEPSEEK_BASE_URL=https://api.deepseek.com
+    depends_on:
+      - redis
+    networks:
+      - aiagent-network
+
+  celery:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile.dev
+    command: celery -A app.core.celery_app worker --loglevel=info
+    volumes:
+      - ./backend:/app
+    environment:
+      - DATABASE_URL=mysql+pymysql://root:!Rjb12191@gz-cynosdbmysql-grp-d26pzce5.sql.tencentcdb.com:24936/agent_db?charset=utf8mb4
+      - REDIS_URL=redis://redis:6379/0
+      - DEEPSEEK_API_KEY=sk-fdf7cc1c73504e628ec0119b7e11b8cc
+      - DEEPSEEK_BASE_URL=https://api.deepseek.com
+    depends_on:
+      - redis
+      - backend
+    networks:
+      - aiagent-network
+
+  celery-beat:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile.dev
+    command: celery -A app.core.celery_app beat --loglevel=info
+    volumes:
+      - ./backend:/app
+    environment:
+      - DATABASE_URL=mysql+pymysql://root:!Rjb12191@gz-cynosdbmysql-grp-d26pzce5.sql.tencentcdb.com:24936/agent_db?charset=utf8mb4
+      - REDIS_URL=redis://redis:6379/0
+      - DEEPSEEK_API_KEY=sk-fdf7cc1c73504e628ec0119b7e11b8cc
+      - DEEPSEEK_BASE_URL=https://api.deepseek.com
+    depends_on:
+      - redis
+      - backend
+    networks:
+      - aiagent-network
+
+  redis:
+    image: redis:7-alpine
+    ports:
+      - "6380:6379"   # 主机 6380 映射到容器 6379，避免与宿主机 6379 冲突
+    volumes:
+      - redis_data:/data
+    networks:
+      - aiagent-network
+
+volumes:
+  redis_data:
+
+networks:
+  aiagent-network:
+    driver: bridge