🎛️ feat(dashboard): add per-panel enable switches & conditional backend payload

Backend:
• ConsoleSetting
  - Introduce `ApiInfoEnabled`, `UptimeKumaEnabled`, `AnnouncementsEnabled`, `FAQEnabled` (default true).
• misc.GetStatus
  - Refactor to build response map dynamically.
  - Return the four *_enabled flags.
  - Only append `api_info`, `announcements`, `faq` when their respective flags are true.

Frontend:
• Detail page
  - Remove all `self_use_mode_enabled` checks.
  - Render API, Announcement, FAQ and Uptime panels based on the new *_enabled flags.
• Dashboard → Settings
  - Added `Switch` controls in:
    · SettingsAPIInfo.js
    · SettingsAnnouncements.js
    · SettingsFAQ.js
    · SettingsUptimeKuma.js
  - Each switch persists its state via `/api/option` to the corresponding
    `console_setting.<panel>_enabled` key and reflects current status on load.
  - DashboardSetting.js now initialises and refreshes the four *_enabled keys so
    child components receive accurate panel states.

Fixes:
• Switches previously defaulted to “on” because *_enabled keys were missing.
  They are now included, ensuring correct visual state when panels are disabled.

No breaking changes; existing functionality remains untouched aside from the
new per-panel visibility control.

setting/console_setting/config.go

@@ -8,6 +8,10 @@ type ConsoleSetting struct {
     UptimeKumaSlug string `json:"uptime_kuma_slug"` // Uptime Kuma Status Page Slug
     Announcements  string `json:"announcements"`    // 系统公告 (JSON 数组字符串)
     FAQ            string `json:"faq"`              // 常见问题 (JSON 数组字符串)
+    ApiInfoEnabled        bool `json:"api_info_enabled"`        // 是否启用 API 信息面板
+    UptimeKumaEnabled     bool `json:"uptime_kuma_enabled"`     // 是否启用 Uptime Kuma 面板
+    AnnouncementsEnabled  bool `json:"announcements_enabled"`   // 是否启用系统公告面板
+    FAQEnabled            bool `json:"faq_enabled"`             // 是否启用常见问答面板
 }
 
 // 默认配置
@@ -17,6 +21,10 @@ var defaultConsoleSetting = ConsoleSetting{
     UptimeKumaSlug: "",
     Announcements:  "",
     FAQ:            "",
+    ApiInfoEnabled:       true,
+    UptimeKumaEnabled:    true,
+    AnnouncementsEnabled: true,
+    FAQEnabled:           true,
 }
 
 // 全局实例