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/src/components/SkillMarket.tsx

@@ -225,7 +225,7 @@ function SkillCard({
                       e.stopPropagation();
                       onInstall();
                     }}
-                    className="flex items-center gap-1.5 px-3 py-1.5 text-sm bg-blue-500 hover:bg-blue-600 text-white rounded-lg transition-colors"
+                    className="flex items-center gap-1.5 px-3 py-1.5 text-sm bg-gray-700 dark:bg-gray-600 hover:bg-gray-800 dark:hover:bg-gray-500 text-white rounded-lg transition-colors"
                   >
                     <Plus className="w-4 h-4" />
                     安装
@@ -401,7 +401,7 @@ export function SkillMarket({
             value={searchQuery}
             onChange={(e) => handleSearch(e.target.value)}
             placeholder="搜索技能、能力、触发词..."
-            className="w-full pl-9 pr-3 py-2 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-800 text-gray-900 dark:text-gray-100 focus:ring-2 focus:ring-purple-500 focus:border-transparent text-sm"
+            className="w-full pl-9 pr-3 py-2 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-800 text-gray-900 dark:text-gray-100 focus:ring-2 focus:ring-gray-400 focus:border-transparent text-sm"
           />
         </div>