feat: add Docker support for offline deployment with qwen3:14b

Major additions:
- All-in-One Docker image with Ollama + models bundled
- Separate deployment option for existing Ollama installations
- Changed default model from qwen3:8b to qwen3:14b
- Comprehensive deployment documentation

Files added:
- Dockerfile: Basic app-only image
- Dockerfile.allinone: Complete image with Ollama + models
- docker-compose.yml: Easy deployment configuration
- docker-entrypoint.sh: Startup script for all-in-one image
- requirements.txt: Python dependencies
- .dockerignore: Exclude unnecessary files from image

Scripts:
- export-ollama-models.sh: Export models from local Ollama
- build-allinone.sh: Build complete offline-deployable image
- build-and-export.sh: Build and export basic image

Documentation:
- DEPLOYMENT.md: Comprehensive deployment guide
- QUICK_START.md: Quick reference for common tasks

Configuration:
- Updated config.py: DEFAULT_CHAT_MODEL = qwen3:14b
- Updated frontend/opro.html: Page title to 系统提示词优化

frontend/opro.html

@@ -6,7 +6,7 @@
     <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate">
     <meta http-equiv="Pragma" content="no-cache">
     <meta http-equiv="Expires" content="0">
-    <title>OPRO - System Instruction Optimizer</title>
+    <title>系统提示词优化</title>
     <script crossorigin src="https://unpkg.com/react@18/umd/react.production.min.js"></script>
     <script crossorigin src="https://unpkg.com/react-dom@18/umd/react-dom.production.min.js"></script>
     <script src="https://cdn.tailwindcss.com"></script>
@@ -509,7 +509,7 @@
                     // Header
                     React.createElement('div', { className: 'px-4 py-3 border-b border-gray-200 bg-white flex items-center gap-3' },
                         React.createElement('h1', { className: 'text-lg font-normal text-gray-800' },
-                            'OPRO'
+                            '系统提示词优化'
                         ),
                         currentSessionId && React.createElement('div', { className: 'text-sm text-gray-500' },
                             sessions.find(s => s.session_id === currentSessionId)?.session_name || '当前会话'