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/MessageSearch.tsx

@@ -428,10 +428,10 @@ export function MessageSearch({ onNavigateToMessage }: MessageSearchProps) {
                           onChange={(e) => setFilters((prev) => ({ ...prev, timeRange: e.target.value as SearchFilters['timeRange'] }))}
                           className="text-xs bg-white dark:bg-gray-800 border border-gray-200 dark:border-gray-700 rounded px-2 py-1 focus:outline-none focus:ring-1 focus:ring-orange-500"
                         >
-                          <option value="all">All time</option>
-                          <option value="today">Today</option>
-                          <option value="week">This week</option>
-                          <option value="month">This month</option>
+                          <option value="all">全部时间</option>
+                          <option value="today">今天</option>
+                          <option value="week">本周</option>
+                          <option value="month">本月</option>
                         </select>
                       </div>
                     </div>
@@ -442,7 +442,7 @@ export function MessageSearch({ onNavigateToMessage }: MessageSearchProps) {
               {/* Search history */}
               {!query && searchHistory.length > 0 && (
                 <div className="mt-2">
-                  <div className="text-xs text-gray-400 dark:text-gray-500 mb-1">Recent searches:</div>
+                  <div className="text-xs text-gray-400 dark:text-gray-500 mb-1">最近搜索:</div>
                   <div className="flex flex-wrap gap-1">
                     {searchHistory.slice(0, 5).map((item, index) => (
                       <button