Phase 1: ProjectEngine + PyEnvManager + project management WebUI

- New: services/project_engine.py (async subprocess manager)
- New: services/pyenv_manager.py (Python version + venv + git clone)
- New: services/web_panel/routes/projects.py (5 REST endpoints)
- New: static/web_panel/pages/projects.html (WebUI)
- Tests: 28/28 passing, API verified (GET /api/projects)
- Docs: Phase1_Progress.md (local)

services/web_panel/manager.py

@@ -5,7 +5,7 @@ import os
 import logging
 from pathlib import Path
 from aiohttp import web
-from .routes import auth, status, plugins, commands, logs
+from .routes import auth, status, plugins, commands, logs, projects
 
 logger = logging.getLogger(__name__)
 
@@ -62,6 +62,7 @@ class WebPanelManager:
         plugins.setup_routes(app, self.base_path)
         commands.setup_routes(app, self.base_path)
         logs.setup_routes(app, self.base_path)
+        projects.setup_project_routes(app, self.sm)
         
         # 注册日志广播
         ls = self.sm.get_service("log")