Fix dependencies and add SDD v1.0

Changes:
- Fix Python dependency conflicts in requirements.txt
- Update to use compatible version ranges
- Add fix_dependencies.bat for easy dependency repair
- Create comprehensive DEPENDENCY_FIX.md guide
- Add complete System Design Document (SDD) v1.0

SDD v1.0 includes:
✅ System architecture with dual backend
✅ Complete database design (31 tables)
✅ API specifications
✅ Security design
✅ Deployment architecture
✅ Performance optimization strategies

Fixed Issues:
🐛 Flask/cryptography version conflicts
🐛 pip dependency resolver warnings

Documentation:
📚 DEPENDENCY_FIX.md - Dependency troubleshooting
📚 SDD_系統設計文件_v1.0.md - Complete system design

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

requirements.txt

@@ -1,27 +1,31 @@
-# Flask 核心
-Flask==3.0.0
-Werkzeug==3.0.1
+# Flask 核心（使用相容版本）
+Flask>=2.3.0,<3.1.0
+Werkzeug>=2.3.0,<3.1.0
 
 # CORS 支援
-Flask-Cors==4.0.0
+Flask-Cors>=4.0.0
 
 # 資料庫
-PyMySQL==1.1.0
-cryptography==41.0.7
+PyMySQL>=1.1.0
+cryptography>=41.0.0
 
 # HTTP 請求
-requests==2.31.0
+requests>=2.31.0
 
 # 環境變數
-python-dotenv==1.0.0
+python-dotenv>=1.0.0
 
 # JSON 處理
-jsonschema==4.20.0
+jsonschema>=4.20.0
 
 # 日期時間
-python-dateutil==2.8.2
+python-dateutil>=2.8.2
+
+# 確保相容的依賴版本
+referencing>=0.30.0
+rpds-py>=0.10.0
 
 # 開發工具（可選）
-# pytest==7.4.3
-# black==23.12.1
-# flake8==6.1.0
+# pytest>=7.4.0
+# black>=23.12.0
+# flake8>=6.1.0