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/client/src/components/layout/ProfileSelector.vue

@@ -0,0 +1,67 @@
+<script setup lang="ts">
+import { computed, onMounted } from 'vue'
+import { NSelect } from 'naive-ui'
+import { useProfilesStore } from '@/stores/hermes/profiles'
+import { useAppStore } from '@/stores/hermes/app'
+import { useI18n } from 'vue-i18n'
+
+const { t } = useI18n()
+const profilesStore = useProfilesStore()
+const appStore = useAppStore()
+
+const options = computed(() =>
+  profilesStore.profiles.map(p => ({
+    label: p.name,
+    value: p.name,
+  })),
+)
+
+const activeName = computed(() => profilesStore.activeProfile?.name ?? '')
+
+function handleChange(value: string | number | Array<string | number>) {
+  if (typeof value === 'string' && value !== activeName.value) {
+    profilesStore.switchProfile(value).then(ok => {
+      if (ok) {
+        window.location.reload()
+      }
+    })
+  }
+}
+
+onMounted(() => {
+  if (profilesStore.profiles.length === 0) {
+    profilesStore.fetchProfiles()
+  }
+})
+</script>
+
+<template>
+  <div class="profile-selector">
+    <div class="selector-label">{{ t('sidebar.profiles') }}</div>
+    <NSelect
+      :value="activeName"
+      :options="options"
+      :loading="profilesStore.switching"
+      size="small"
+      @update:value="handleChange"
+    />
+  </div>
+</template>
+
+<style scoped lang="scss">
+@use '@/styles/variables' as *;
+
+.profile-selector {
+  padding: 0 12px;
+  margin-bottom: 8px;
+}
+
+.selector-label {
+  font-size: 11px;
+  font-weight: 600;
+  color: $text-muted;
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+  margin-bottom: 6px;
+}
+</style>