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/client/src/stores/hermes/models.ts

@@ -6,6 +6,7 @@ import { useAppStore } from './app'
 
 export const useModelsStore = defineStore('models', () => {
   const providers = ref<AvailableModelGroup[]>([])
+  const allProviders = ref<AvailableModelGroup[]>([])
   const defaultModel = ref('')
   const loading = ref(false)
 
@@ -34,6 +35,7 @@ export const useModelsStore = defineStore('models', () => {
     try {
       const res = await systemApi.fetchAvailableModels()
       providers.value = res.groups
+      allProviders.value = res.allProviders
       defaultModel.value = res.default
     } catch (err) {
       console.error('Failed to fetch providers:', err)
@@ -65,6 +67,7 @@ export const useModelsStore = defineStore('models', () => {
 
   return {
     providers,
+    allProviders,
     defaultModel,
     loading,
     customProviders,