feat: add storage and script failure notifications

frontend/src/views/SettingsView.vue

@@ -168,6 +168,8 @@ const form = reactive<SettingsFormModel>({
   segmentCompletedScriptPath: "",
   segmentCompletedScriptContent: "",
   eventScriptTimeoutSeconds: 60,
+  eventScriptRetryAttempts: 3,
+  eventScriptRetryDelaySeconds: 10,
   enableEmailNotification: false,
   emailSmtpHost: "",
   emailSmtpPort: 587,
@@ -1480,16 +1482,26 @@ watch(
 
         <el-form label-position="top">
           <el-row :gutter="16">
-            <el-col :span="8">
+            <el-col :span="6">
               <el-form-item label="启用事件脚本">
                 <el-switch v-model="form.enableEventScripts" />
               </el-form-item>
             </el-col>
-            <el-col :span="8">
+            <el-col :span="6">
               <el-form-item label="脚本超时（秒）">
                 <el-input-number v-model="form.eventScriptTimeoutSeconds" :min="1" :max="3600" />
               </el-form-item>
             </el-col>
+            <el-col :span="5">
+              <el-form-item label="重试次数">
+                <el-input-number v-model="form.eventScriptRetryAttempts" :min="0" :max="20" />
+              </el-form-item>
+            </el-col>
+            <el-col :span="6">
+              <el-form-item label="重试间隔（秒）">
+                <el-input-number v-model="form.eventScriptRetryDelaySeconds" :min="0" :max="3600" />
+              </el-form-item>
+            </el-col>
           </el-row>
         </el-form>
 
@@ -1676,6 +1688,10 @@ watch(
             The official Docker image includes <code>curl</code> and <code>jq</code> by default. If you run on a host machine or a custom image, rely on the commands available in that environment.
           </div>
 
+          <div class="event-script-help__intro">
+            Set <code>Retry attempts</code> to <code>0</code> to disable automatic retries. Retry exhaustion failures are sent through the existing exception notification channel.
+          </div>
+
           <div class="event-script-example">
             <div class="event-script-example__label">Environment variable examples</div>
             <div class="event-script-example__grid">
@@ -1699,7 +1715,8 @@ watch(
 
       <el-card class="surface-card settings-card settings-grid__full" shadow="never">
         <h3 class="section-title">Webhook 閫氱煡</h3>
-        <p class="section-subtitle">Send fixed JSON POST payloads with custom headers. Currently only live-started and exception events are sent.</p>
+        <h3 class="section-title">Webhook 通知</h3>
+        <p class="section-subtitle">Send fixed JSON POST payloads with custom headers. Exception notifications also cover low-storage stop events and event-script failures after retries are exhausted.</p>
 
         <el-form label-position="top">
           <el-row :gutter="16">
@@ -1772,7 +1789,8 @@ watch(
 
       <el-card class="surface-card settings-card settings-grid__full" shadow="never">
         <h3 class="section-title">閭欢閫氱煡</h3>
-        <p class="section-subtitle">Configure SMTP plus HTML templates for live-started and exception alerts. Tests use the current unsaved form values directly.</p>
+        <h3 class="section-title">邮件通知</h3>
+        <p class="section-subtitle">Configure SMTP plus HTML templates for live-started and exception alerts. Exception notifications also cover low-storage stop events and event-script failures after retries are exhausted.</p>
 
         <el-form label-position="top">
           <el-row :gutter="16">