feat: profile-aware routes, provider sync, channel settings improvements

- Add hermes-profile.ts for dynamic profile path resolution (all backend
  routes now read from active profile directory instead of hardcoded ~/.hermes/)
- Add profile switcher dropdown in sidebar, reload page on switch
- Sync PROVIDER_PRESETS with Hermes CLI (fix keys: kimi-coding→kimi-for-coding,
  kilocode→kilo, ai-gateway→vercel, opencode-zen→opencode; remove moonshot)
- Sync PROVIDER_ENV_MAP with Hermes models.dev + overlays (correct env var names)
- Add gateway restart after adding model provider
- Don't write GLM_BASE_URL/KIMI_BASE_URL for zai/kimi (let Hermes auto-detect)
- Write API keys to .env and credential_pool for all providers
- Built-in providers skip custom_providers in config.yaml
- Add debounce + per-field loading state for channel settings inputs
- Run hermes setup --reset for profiles without config.yaml
- Create empty .env for new profiles (not copied from default)

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

vite.config.ts

@@ -2,6 +2,7 @@ import { defineConfig } from 'vite'
 import vue from '@vitejs/plugin-vue'
 import type { ProxyOptions } from 'vite'
 import { resolve } from 'path'
+import pkg from './package.json'
 
 const BACKEND = 'http://127.0.0.1:8648'
 
@@ -25,6 +26,9 @@ function createProxyConfig(): ProxyOptions {
 export default defineConfig({
   root: 'packages/client',
   plugins: [vue()],
+  define: {
+    __APP_VERSION__: JSON.stringify(pkg.version),
+  },
   resolve: {
     alias: {
       '@': resolve(__dirname, 'packages/client/src'),