✨ refactor(console_setting): migrate console settings to model_setting auto-injection

Backend
- Introduce `setting/console_setting` package that defines `ConsoleSetting` struct with JSON tags and validation rules.
- Register the new module with `config.GlobalConfig` to enable automatic injection/export of configuration values.
- Remove legacy `setting/console.go` and the manual `OptionMap` hooks; clean up `model/option.go`.
- Add `controller/console_migrate.go` providing `/api/option/migrate_console_setting` endpoint for one-off data migration.
- Update controllers (`misc`, `option`, `uptime_kuma`) and router to consume namespaced keys `console_setting.*`.

Frontend
- Refactor dashboard pages (`SettingsAPIInfo`, `SettingsAnnouncements`, `SettingsFAQ`, `SettingsUptimeKuma`) and detail page to read/write the new keys.
- Simplify `DashboardSetting.js` state to only include namespaced options.

BREAKING CHANGE: All console-related option keys are now stored under `console_setting.*`. Run the migration endpoint once after deployment to preserve existing data.

web/src/pages/Setting/Dashboard/SettingsAnnouncements.js

@@ -176,7 +176,7 @@ const SettingsAnnouncements = ({ options, refresh }) => {
     try {
       setLoading(true);
       const announcementsJson = JSON.stringify(announcementsList);
-      await updateOption('Announcements', announcementsJson);
+      await updateOption('console_setting.announcements', announcementsJson);
       setHasChanges(false);
     } catch (error) {
       console.error('系统公告更新失败', error);
@@ -288,10 +288,11 @@ const SettingsAnnouncements = ({ options, refresh }) => {
   };
 
   useEffect(() => {
-    if (options.Announcements !== undefined) {
-      parseAnnouncements(options.Announcements);
+    const annStr = options['console_setting.announcements'] ?? options.Announcements;
+    if (annStr !== undefined) {
+      parseAnnouncements(annStr);
     }
-  }, [options.Announcements]);
+  }, [options['console_setting.announcements'], options.Announcements]);
 
   const handleBatchDelete = () => {
     if (selectedRowKeys.length === 0) {