feat(skills): add Chinese platform marketing specialists

- Add wechat-official-account: WeChat OA content & engagement expert
- Add xiaohongshu-specialist: RED (Xiaohongshu) lifestyle content expert
- Add zhihu-strategist: Zhihu thought leadership & knowledge marketing
- Update SYSTEM_ANALYSIS.md: total skills now 65, Marketing 9

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

docs/SYSTEM_ANALYSIS.md

@@ -40,7 +40,7 @@ ZCLAW 是基于 **OpenFang** (Rust Agent OS) 的 AI Agent 桌面客户端，核
 │  ├── Support      ████████████████████████  100% (6/6)          │
 │  ├── Design       ████████████████████████  100% (7/7)          │
 │  ├── Product      ████████████████████████  100% (3/3)          │
-│  ├── Marketing    ████████████████████████  100% (7/7)          │
+│  ├── Marketing    ████████████████████████  100% (9/9)          │
 │  ├── PM           ████████████████████████  100% (5/5)          │
 │  ├── Spatial      ████████████████████████  100% (6/6)          │
 │  └── Specialized  ████████████████████████  100% (6/6)          │
@@ -301,12 +301,12 @@ ZCLAW 是基于 **OpenFang** (Rust Agent OS) 的 AI Agent 桌面客户端，核
 | **Support** | 6 | ✅ 完成 | support-responder, executive-summary-generator, finance-tracker, infrastructure-maintainer, legal-compliance-checker, analytics-reporter |
 | **Design** | 7 | ✅ 完成 | ux-architect, ux-researcher, visual-storyteller, brand-guardian, image-prompt-engineer, whimsy-injector, ui-designer |
 | **Product** | 3 | ✅ 完成 | feedback-synthesizer, sprint-prioritizer, trend-researcher |
-| **Marketing** | 7 | ✅ 完成 | growth-hacker, content-creator, social-media-strategist, tiktok-strategist, reddit-community-builder, app-store-optimizer, 以及中国平台专家 |
+| **Marketing** | 9 | ✅ 完成 | growth-hacker, content-creator, social-media-strategist, tiktok-strategist, reddit-community-builder, app-store-optimizer, wechat-official-account, xiaohongshu-specialist, zhihu-strategist |
 | **Project Management** | 5 | ✅ 完成 | studio-producer, project-shepherd, studio-operations, experiment-tracker, senior-pm |
 | **Spatial Computing** | 6 | ✅ 完成 | visionos-spatial-engineer, macos-spatial-metal-engineer, terminal-integration-specialist, xr-cockpit-interaction-specialist, xr-immersive-developer, xr-interface-architect |
 | **Specialized** | 6 | ✅ 完成 | agents-orchestrator, agentic-identity-trust, lsp-index-engineer, report-distribution-agent, sales-data-extraction-agent, data-consolidation-agent |
 
-**当前 Skills 总数**: 63 ✅
+**当前 Skills 总数**: 65 ✅
 **agency-agents 集成进度**: 100% ✅
 
 #### 协作框架 (新增)