完善后台任务中心历史摘要视图

- 为系统任务和插件调度补充批量历史摘要查询，支持最近成功时间、最近失败原因与累计成功失败次数

- 任务列表接口合并内存运行态与数据库日志态，服务重启后后台仍可回看最近执行结果

- 系统任务页与插件调度页新增健康状态、历史执行摘要与插件调度快捷启停入口

- 更新工程优化文档，记录 7.3 第一阶段当前进展

admin/dashboard/templates/system_jobs.html

@@ -33,6 +33,28 @@
                     <el-tag :type="statusTag(scope.row.last_status)">{% raw %}{{ scope.row.last_status || 'never' }}{% endraw %}</el-tag>
                 </template>
             </el-table-column>
+            <el-table-column label="健康状态" width="120" align="center">
+                <template slot-scope="scope">
+                    <el-tag :type="healthTag(scope.row.health_status)">{% raw %}{{ healthLabel(scope.row.health_status) }}{% endraw %}</el-tag>
+                </template>
+            </el-table-column>
+            <el-table-column prop="latest_success_at" label="最近成功" min-width="170"></el-table-column>
+            <el-table-column label="最近失败原因" min-width="240">
+                <template slot-scope="scope">
+                    <div class="cell-ellipsis" :title="scope.row.latest_failure_summary || scope.row.last_error || '-'">
+                        {% raw %}{{ scope.row.latest_failure_summary || scope.row.last_error || '-' }}{% endraw %}
+                    </div>
+                </template>
+            </el-table-column>
+            <el-table-column label="历史执行" width="150" align="center">
+                <template slot-scope="scope">
+                    <div class="history-metrics">
+                        <span class="metric-success">{% raw %}{{ `成 ${scope.row.history_success_count || 0}` }}{% endraw %}</span>
+                        <span class="metric-fail">{% raw %}{{ `失 ${scope.row.history_fail_count || 0}` }}{% endraw %}</span>
+                    </div>
+                    <div class="history-total">{% raw %}{{ `共 ${scope.row.history_total_count || 0}` }}{% endraw %}</div>
+                </template>
+            </el-table-column>
             <el-table-column label="操作" min-width="280">
                 <template slot-scope="scope">
                     <div class="action-row">
@@ -143,6 +165,23 @@ new Vue({
             if (status === 'running') return 'warning';
             return 'info';
         },
+        healthTag(status) {
+            if (status === 'healthy') return 'success';
+            if (status === 'running') return 'warning';
+            if (status === 'failed') return 'danger';
+            if (status === 'disabled') return 'info';
+            return '';
+        },
+        healthLabel(status) {
+            const mapping = {
+                healthy: '健康',
+                running: '执行中',
+                failed: '异常',
+                disabled: '停用',
+                idle: '待运行'
+            };
+            return mapping[status] || '待运行';
+        },
         async loadJobs() {
             this.loading = true;
             try {
@@ -269,5 +308,10 @@ new Vue({
 .page-hero-copy h1{font-size:30px;line-height:1.1;margin-bottom:10px;color:#0f172a}
 .page-hero-copy p{color:#64748b;font-size:14px}
 .action-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
+.cell-ellipsis{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#475569}
+.history-metrics{display:flex;align-items:center;justify-content:center;gap:8px}
+.metric-success{color:#16a34a;font-weight:600}
+.metric-fail{color:#dc2626;font-weight:600}
+.history-total{margin-top:4px;color:#64748b;font-size:12px}
 </style>
 {% endblock %}