chore: 提交所有工作进度 — SaaS 后端增强、Admin UI、桌面端集成

包含大量 SaaS 平台改进、Admin 管理后台更新、桌面端集成完善、
文档同步、测试文件重构等内容。为 QA 测试准备干净工作树。

crates/zclaw-protocols/src/a2a.rs

@@ -427,6 +427,28 @@ impl A2aRouter {
     pub fn agent_id(&self) -> &AgentId {
         &self.agent_id
     }
+
+    /// Discover agents that have a specific capability
+    pub async fn discover(&self, capability: &str) -> Result<Vec<A2aAgentProfile>> {
+        let cap_index = self.capability_index.read().await;
+        let profiles = self.profiles.read().await;
+
+        match cap_index.get(capability) {
+            Some(agent_ids) => {
+                let result: Vec<A2aAgentProfile> = agent_ids.iter()
+                    .filter_map(|id| profiles.get(id).cloned())
+                    .collect();
+                Ok(result)
+            }
+            None => Ok(Vec::new()),
+        }
+    }
+
+    /// Get all registered agent profiles
+    pub async fn list_profiles(&self) -> Vec<A2aAgentProfile> {
+        let profiles = self.profiles.read().await;
+        profiles.values().cloned().collect()
+    }
 }
 
 /// Basic A2A client implementation