refactor: project restructuring - migrate to modular directory layout

- Move root-level docs into docs/ directory
- Move config files into config/ directory
- Move docker files into docker/ directory
- Move test scripts into tests/ directory
- Remove .env from tracking (use .env.example as template)
- Remove .venv/ from tracking (use requirements.txt)
- Add Vue3 frontend app (vue-app/)
- Add new routes: upload, user_templates, meeting_minutes, etc.
- Add database migrations for prompt_template additions
- Fix load_dotenv() to use absolute path for Flask reloader compatibility

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

scripts/run_dev_fixed.py

@@ -0,0 +1,14 @@
+# -*- coding: utf-8 -*-
+"""
+修复版本的开发服务器启动脚本
+"""
+from src.flask_prompt_master import create_app
+
+if __name__ == '__main__':
+    app = create_app()
+    app.run(
+        host='0.0.0.0',  # 绑定到所有地址
+        port=5002,
+        debug=True,
+        use_reloader=False  # 禁用自动重载，避免连接问题
+    )