docs(guide): rewrite CLAUDE.md with ZCLAW-first perspective

Major changes:
- Shift from "OpenFang desktop client" to "independent AI Agent desktop app"
- Add decision principle: "Is this useful for ZCLAW? Does it affect ZCLAW?"
- Simplify project structure and tech stack sections
- Replace OpenClaw vs OpenFang comparison with unified backend approach
- Consolidate troubleshooting from scattered sections into organized FAQ
- Update Hands system documentation with 8 capabilities and status
- Stream

desktop/vite.config.ts

@@ -29,7 +29,7 @@ export default defineConfig(async () => ({
       ignored: ["**/src-tauri/**"],
     },
     proxy: {
-      // Proxy /api requests to OpenFang Kernel (port 50051)
+      // Proxy /api requests to OpenFang Kernel (port 50051 - actual running port)
       // OpenFang is managed by Tauri app - started via gateway_start command
       '/api': {
         target: 'http://127.0.0.1:50051',