docs: create comprehensive system analysis report

Replace partial alignment analysis with full SYSTEM_ANALYSIS.md containing:

- Complete deviation analysis (API 60%, UI 80%, Hands 43%, Skills 7%)
- Root cause analysis of gaps
- 5-phase evolution roadmap with clear milestones
- Technical debt inventory
- Acceptance criteria per phase

Key findings:
- Session management API completely missing (0%)
- 4/7 Hands missing TOML configurations
- Workflow editor/delete/create using placeholder alerts
- HandTaskPanel using hardcoded mock data

Updates:
- Archive README updated with clear pointer to new report
- deviation-analysis.md marked as deprecated with comparison table
- knowledge-base README updated to reference SYSTEM_ANALYSIS.md
- Removed partial openfang-alignment-analysis.md

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

docs/knowledge-base/README.md

@@ -13,10 +13,11 @@ knowledge-base/
 ├── agent-provider-config.md     # Agent 和 LLM 提供商配置
 ├── tauri-desktop.md            # Tauri 桌面端开发笔记
 ├── feature-checklist.md        # 功能清单和验证状态
-├── hands-integration-lessons.md # Hands 集成经验总结
-└── openfang-alignment-analysis.md # OpenFang 对齐分析（替代偏离报告）
+└── hands-integration-lessons.md # Hands 集成经验总结
 ```
 
+> **系统分析**: 完整的系统偏离分析和演化路线图见 [../SYSTEM_ANALYSIS.md](../SYSTEM_ANALYSIS.md)
+
 ## 快速索引
 
 ### 协议与通信