fix: P0 panic风险修复 + P1编译warnings清零 + P2代码/文档清理

P0 安全性:
- account/handlers.rs: .unwrap() → .expect() 语义化错误信息
- relay/handlers.rs: SSE Response .unwrap() → .expect()

P1 编译质量 (6 warnings → 0):
- kernel.rs: 移除未使用的 Capability import 和 config_clone 变量
- pipeline_commands.rs: 未使用变量 id → _id
- db.rs: 移除多余括号
- relay/service.rs: 移除未使用的 StreamExt import
- telemetry/service.rs: 抑制 param_idx 未读赋值警告
- main.rs: TcpKeepalive::with_retries() Linux-only 条件编译

P2 代码清理:
- 移除 handStore/HandsPanel/HandTaskPanel/gateway-api/SchedulerPanel 调试 console.log
- SchedulerPanel: 修复 updateWorkflow 未解构导致 TS 编译错误
- 文档清理 zclaw-channels 已移除 crate 的引用

desktop/src/components/HandTaskPanel.tsx

@@ -93,11 +93,9 @@ export function HandTaskPanel({ handId, onBack }: HandTaskPanelProps) {
     }
 
     setIsActivating(true);
-    console.log(`[HandTaskPanel] Activating hand: ${selectedHand.id} (${selectedHand.name})`);
 
     try {
       const result = await triggerHand(selectedHand.id);
-      console.log(`[HandTaskPanel] Activation result:`, result);
 
       if (result) {
         toast(`Hand "${selectedHand.name}" 已成功启动`, 'success');

desktop/src/components/HandsPanel.tsx

@@ -475,11 +475,9 @@ export function HandsPanel() {
 
   const handleActivate = useCallback(async (hand: Hand, params?: Record<string, unknown>) => {
     setActivatingHandId(hand.id);
-    console.log(`[HandsPanel] Activating hand: ${hand.id} (${hand.name})`, params ? 'with params:' : '', params);
 
     try {
       const result = await triggerHand(hand.id, params);
-      console.log(`[HandsPanel] Hand activation result:`, result);
 
       if (result) {
         toast(`Hand "${hand.name}" 已成功激活`, 'success');

desktop/src/components/SchedulerPanel.tsx

@@ -653,6 +653,7 @@ export function SchedulerPanel() {
   const workflows = useWorkflowStore((s) => s.workflows);
   const loadWorkflows = useWorkflowStore((s) => s.loadWorkflows);
   const createWorkflow = useWorkflowStore((s) => s.createWorkflow);
+  const updateWorkflow = useWorkflowStore((s) => s.updateWorkflow);
   const executeWorkflow = useWorkflowStore((s) => s.triggerWorkflow);
   const handLoading = useHandStore((s) => s.isLoading);
   const workflowLoading = useWorkflowStore((s) => s.isLoading);
@@ -707,7 +708,7 @@ export function SchedulerPanel() {
     try {
       if (editingWorkflow) {
         // Update existing workflow
-        console.log('Update workflow:', editingWorkflow.id, data);
+        await updateWorkflow(editingWorkflow.id, data);
       } else {
         // Create new workflow
         await createWorkflow(data);
@@ -721,7 +722,7 @@ export function SchedulerPanel() {
     } finally {
       setIsSavingWorkflow(false);
     }
-  }, [editingWorkflow, createWorkflow, loadWorkflows]);
+  }, [editingWorkflow, createWorkflow, updateWorkflow, loadWorkflows]);
 
   const handleExecuteWorkflow = useCallback(async (workflowId: string) => {
     try {