feat(settings): link feature toggles to their config pages

Channel Monitor card now links to 渠道管理 > 渠道监控 and the Available
Channels card links to 渠道管理 > 渠道定价 so admins know where to go
after flipping the switch.

frontend/src/i18n/locales/en.ts

@@ -4675,11 +4675,19 @@ export default {
         channelMonitor: {
           title: 'Channel Monitor',
           description: 'Periodically probe configured channels and surface availability / latency to users. Turning it off stops the scheduler and returns an empty list on the user page.',
+          configureLink: 'Configure monitors in Channel Management > Channel Monitor',
           enabled: 'Enable Channel Monitor',
           enabledHint: 'Disabling stops background checks; existing history is preserved.',
           defaultInterval: 'Default check interval (seconds)',
           defaultIntervalHint: 'Pre-fills the interval when creating a new monitor; each monitor can override it. Range 15 – 3600.',
         },
+        availableChannels: {
+          title: 'Available Channels',
+          description: 'Show logged-in users an aggregate view of the channels, models and pricing they can access. Disabled by default.',
+          configureLink: 'Configure model pricing in Channel Management > Channel Pricing',
+          enabled: 'Enable Available Channels',
+          enabledHint: 'When off, the sidebar entry is hidden and the endpoint returns an empty list.',
+        },
       },
       emailTabDisabledTitle: 'Email Verification Not Enabled',
       emailTabDisabledHint: 'Enable email verification in the Security tab to configure SMTP settings.',