feat(timer): 新增定时器配置、日志和主机的后台管理界面

T10: TimerConfig CURD - task management with run_type/status editing,
     manual trigger button, task_name read-only, no add/delete
T11: TimerLog CURD - read-only log viewer with filters and color badges
T12: Host list enhanced - is_master column, setMaster button

app/admin/view/system/timer_log/_common.js

@@ -0,0 +1,11 @@
+var init = {
+    tableElem: '#currentTable',
+    tableRenderId: 'currentTableRenderId',
+    indexUrl: 'system.timer_log/index',
+    addUrl: '',
+    editUrl: '',
+    readUrl: 'system.timer_log/read',
+    deleteUrl: '',
+    exportUrl: '',
+    modifyUrl: '',
+};