fix: Phase 0 阻碍项修复 — 流式事件错误处理 + CI 排除 + UI 中文化

BLK-2: loop_runner.rs 22 处 let _ = tx.send() 全部替换为
if let Err(e) { tracing::warn!(...) }，修复流式事件静默丢失问题

BLK-5: 50+ 英文字符串翻译为中文
- HandApprovalModal.tsx (~40处): 风险标签/按钮/状态/表单标签
- ChatArea.tsx: Thinking.../Sending...
- AuditLogsPanel.tsx: 空状态文案
- HandParamsForm.tsx: 空列表提示
- CreateTriggerModal.tsx: 成功提示
- MessageSearch.tsx: 时间筛选/搜索历史

BLK-6: CI/Release workflow 添加 --exclude zclaw-saas
- ci.yml: clippy/test/build 三个步骤
- release.yml: test 步骤

验证: cargo check ✓ | tsc --noEmit ✓

desktop/src/components/ChatArea.tsx

@@ -683,14 +683,14 @@ function MessageBubble({ message, onRetry }: { message: Message; setInput?: (tex
           // Thinking indicator
           <div className="flex items-center gap-2 px-4 py-3 text-gray-500 dark:text-gray-400">
             <LoadingDots />
-            <span className="text-sm">Thinking...</span>
+            <span className="text-sm">思考中...</span>
           </div>
         ) : (
           <div className={`p-4 shadow-sm ${isUser ? 'chat-bubble-user shadow-md' : 'chat-bubble-assistant'} relative group`}>
             {/* Optimistic sending indicator */}
             {isUser && message.optimistic && (
               <span className="text-xs text-blue-200 dark:text-blue-300 mb-1 block animate-pulse">
-                Sending...
+                发送中...
               </span>
             )}
             {/* Reasoning block for thinking content (DeerFlow-inspired) */}