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>

packages/server/src/routes/hermes/weixin.ts

@@ -3,10 +3,10 @@ import axios from 'axios'
 import { readFile, writeFile } from 'fs/promises'
 import { chmod } from 'fs/promises'
 import { resolve } from 'path'
-import { homedir } from 'os'
 import { restartGateway } from '../../services/hermes-cli'
+import { getActiveEnvPath } from '../../services/hermes-profile'
 
-const envPath = resolve(homedir(), '.hermes/.env')
+const envPath = () => getActiveEnvPath()
 const ILINK_BASE = 'https://ilinkai.weixin.qq.com'
 
 export const weixinRoutes = new Router()
@@ -84,7 +84,7 @@ weixinRoutes.post('/api/hermes/weixin/save', async (ctx) => {
   try {
     let raw: string
     try {
-      raw = await readFile(envPath, 'utf-8')
+      raw = await readFile(envPath(), 'utf-8')
     } catch {
       raw = ''
     }
@@ -124,8 +124,9 @@ weixinRoutes.post('/api/hermes/weixin/save', async (ctx) => {
     }
 
     let output = result.join('\n').replace(/\n{3,}/g, '\n\n').replace(/\n+$/, '') + '\n'
-    await writeFile(envPath, output, 'utf-8')
-    try { await chmod(envPath, 0o600) } catch { /* ignore */ }
+    const ep = envPath()
+    await writeFile(ep, output, 'utf-8')
+    try { await chmod(ep, 0o600) } catch { /* ignore */ }
     await restartGateway()
 
     ctx.body = { success: true }