feat: multi-gateway profile support, provider management overhaul, and model settings tab

- Profile-aware proxy: inject API key from profile-specific .env, route requests via X-Hermes-Profile header
- Remove auth.json dependency: built-in providers use .env, custom providers use config.yaml
- Add allProviders field to available-models response with all hardcoded provider catalogs
- Add Models tab in Settings for editing provider API keys (built-in → .env, custom → config.yaml)
- Add PUT /api/config/providers/:poolKey for updating provider credentials
- ProviderFormModal uses backend allProviders for preset dropdown
- Gateway log format support: parse both agent and gateway log formats
- Add webui server.log to log viewer with log rotation at 3MB
- Fix provider delete loading state and OAuth provider cleanup
- Setup script: require Node.js 23+, auto-upgrade if version too low

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/server/src/shared/providers.ts

@@ -55,22 +55,10 @@ export const PROVIDER_PRESETS: ProviderPreset[] = [
   },
   {
     label: 'Kimi for Coding',
-    value: 'kimi-coding',
-    base_url: 'https://api.kimi.com/coding/v1',
-    models: [
-      'kimi-for-coding',
-      'kimi-k2.5',
-      'kimi-k2-thinking',
-      'kimi-k2-thinking-turbo',
-      'kimi-k2-turbo-preview',
-      'kimi-k2-0905-preview',
-    ],
-  },
-  {
-    label: 'Kimi for Coding (CN)',
     value: 'kimi-coding-cn',
     base_url: 'https://api.kimi.com/coding/v1',
     models: [
+      'kimi-for-coding',
       'kimi-k2.5',
       'kimi-k2-thinking',
       'kimi-k2-turbo-preview',