Release v1.4.7 with unlimited default timeout

desktop/frontend/src/App.vue

@@ -252,7 +252,7 @@ onUnmounted(() => {
         <span class="status-dot" :class="{ running: status.running }"></span>
         <div>
           <strong>{{ status.running ? 'Proxy Running' : 'Proxy Stopped' }}</strong>
-          <small>v1.4.6</small>
+          <small>v1.4.7</small>
         </div>
       </div>
     </aside>

desktop/frontend/src/views/Dashboard.vue

@@ -318,7 +318,7 @@ onUnmounted(() => {
           </div>
           <div class="config-summary-item">
             <label>超时</label>
-            <strong>{{ config.Timeout || 120 }} 秒</strong>
+            <strong>{{ config.Timeout > 0 ? `${config.Timeout} 秒` : '不限制' }}</strong>
           </div>
           <div class="config-summary-item span-2">
             <label>工作目录</label>

desktop/frontend/src/views/Settings.vue

@@ -163,12 +163,13 @@ async function save() {
           </div>
           <div class="field">
             <label>超时秒数</label>
-            <input v-model.number="config.Timeout" type="number" min="1" />
+            <input v-model.number="config.Timeout" type="number" min="0" />
+            <small>0 表示不设置代理层单次请求超时，适合长流程任务。</small>
           </div>
           <div class="field span-2 switch-field">
             <div>
               <label>远端超时兜底</label>
-              <p>远端 API 超时、限流或 5xx 且尚未流式输出时，自动切换到下一个可用模型。</p>
+              <p>设置正数超时后，远端 API 超时、限流或 5xx 且尚未流式输出时，自动切换到下一个可用模型。</p>
             </div>
             <label class="switch">
               <input v-model="config.RemoteFallbackEnabled" type="checkbox" />