fix(log): address CodeRabbit review findings for log database decoupling

frontend/app/(main)/admin/tasks/components/task-manager.tsx

@@ -588,7 +588,11 @@ export function TaskManager() {
                             }
                             disabled={dispatching}
                           >
-                            <SelectTrigger className='w-full text-xs' size='sm'>
+                            <SelectTrigger
+                              id={`param-${param.name}`}
+                              className='w-full text-xs'
+                              size='sm'
+                            >
                               <SelectValue placeholder='选择目标日志库...' />
                             </SelectTrigger>
                             <SelectContent>

frontend/app/(main)/error-pages/page.tsx

@@ -152,8 +152,7 @@ export default function ErrorPagesPage() {
               <div className='space-y-1'>
                 <Label className='text-sm font-medium'>仅针对 GET 请求</Label>
                 <p className='text-sm text-muted-foreground'>
-                  开启后仅对 GET
-                  请求的匹配错误状态码返回自定义错误页；POST/PUT
+                  开启后仅对 GET 请求的匹配错误状态码返回自定义错误页；POST/PUT
                   等其它方法直接透传源站响应。
                 </p>
               </div>

frontend/components/common/settings/operation-tab.tsx

@@ -99,12 +99,17 @@ export function OperationTab({
   const updateRetentionMutation = useMutation({
     mutationFn: async (values: Record<string, string>) => {
       for (const field of LOG_RETENTION_FIELDS) {
+        const raw = (values[field.key] ?? '').trim();
+        const num = Number(raw);
+        if (!raw || !Number.isInteger(num) || num < 1) {
+          throw new Error(`${field.label}必须为大于等于 1 的整数`);
+        }
         const config = businessConfigs[field.key];
         if (!config) {
           throw new Error(`缺少配置项: ${field.key}`);
         }
         await services.adminSystemConfig.updateSystemConfig(field.key, {
-          value: values[field.key] ?? '90',
+          value: String(num),
           description: config.description,
         });
       }