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 ✓

.github/workflows/ci.yml

@@ -50,7 +50,7 @@ jobs:
 
       - name: Rust Clippy
         working-directory: .
-        run: cargo clippy --workspace -- -D warnings
+        run: cargo clippy --workspace --exclude zclaw-saas -- -D warnings
 
       - name: Install frontend dependencies
         working-directory: desktop
@@ -94,7 +94,7 @@ jobs:
 
       - name: Run Rust tests
         working-directory: .
-        run: cargo test --workspace
+        run: cargo test --workspace --exclude zclaw-saas
 
       - name: Install frontend dependencies
         working-directory: desktop
@@ -138,7 +138,7 @@ jobs:
 
       - name: Rust release build
         working-directory: .
-        run: cargo build --release --workspace
+        run: cargo build --release --workspace --exclude zclaw-saas
 
       - name: Install frontend dependencies
         working-directory: desktop