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。

desktop/src/lib/kernel-client.ts

@@ -464,7 +464,7 @@ export class KernelClient {
       agentId?: string;
     }
   ): Promise<{ runId: string }> {
-    const runId = `run_${Date.now()}`;
+    const runId = crypto.randomUUID();
     const sessionId = opts?.sessionKey || runId;
     const agentId = opts?.agentId || this.defaultAgentId;
 
@@ -1100,12 +1100,54 @@ export class KernelClient {
     return () => {};
   }
 
+  // === A2A (Agent-to-Agent) API ===
+
   /**
-   * Verify audit log chain (GatewayClient compatibility)
-   * Note: Not implemented for internal kernel
+   * Send a direct A2A message from one agent to another
    */
-  async verifyAuditLogChain(): Promise<{ valid: boolean; chain_depth?: number; root_hash?: string; broken_at_index?: number }> {
-    return { valid: false, chain_depth: 0, root_hash: '' };
+  /**
+   * Send a direct A2A message from one agent to another
+   */
+  async a2aSend(from: string, to: string, payload: unknown, messageType?: string): Promise<void> {
+    await invoke('agent_a2a_send', {
+      from,
+      to,
+      payload,
+      messageType: messageType || 'notification',
+    });
+  }
+
+  /**
+   * Broadcast a message from an agent to all other agents
+   */
+  async a2aBroadcast(from: string, payload: unknown): Promise<void> {
+    await invoke('agent_a2a_broadcast', { from, payload });
+  }
+
+  /**
+   * Discover agents that have a specific capability
+   */
+  async a2aDiscover(capability: string): Promise<Array<{
+    id: string;
+    name: string;
+    description: string;
+    capabilities: Array<{ name: string; description: string }>;
+    role: string;
+    priority: number;
+  }>> {
+    return await invoke('agent_a2a_discover', { capability });
+  }
+
+  /**
+   * Delegate a task to another agent and wait for response
+   */
+  async a2aDelegateTask(from: string, to: string, task: string, timeoutMs?: number): Promise<unknown> {
+    return await invoke('agent_a2a_delegate_task', {
+      from,
+      to,
+      task,
+      timeoutMs: timeoutMs || 30000,
+    });
   }
 
   // === Internal ===