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-tauri/src/lib.rs

@@ -1320,6 +1320,7 @@ pub fn run() {
         .manage(reflection_state)
         .manage(identity_state)
         .manage(kernel_state)
+        .manage(kernel_commands::SessionStreamGuard::default())
         .manage(pipeline_state)
         .invoke_handler(tauri::generate_handler![
             // Internal ZCLAW Kernel commands (preferred)
@@ -1344,9 +1345,17 @@ pub fn run() {
             kernel_commands::hand_get,
             kernel_commands::hand_run_status,
             kernel_commands::hand_run_list,
+            kernel_commands::hand_run_cancel,
             // Scheduled task commands
             kernel_commands::scheduled_task_create,
             kernel_commands::scheduled_task_list,
+
+            // A2A commands (Agent-to-Agent messaging)
+            kernel_commands::agent_a2a_send,
+            kernel_commands::agent_a2a_broadcast,
+            kernel_commands::agent_a2a_discover,
+            kernel_commands::agent_a2a_delegate_task,
+
             // Pipeline commands (DSL-based workflows)
             pipeline_commands::pipeline_list,
             pipeline_commands::pipeline_get,