feat: support manual model input and sync provider catalogs

- Allow manual model name input when adding custom providers (NSelect tag mode)
- Sync provider model catalogs with Hermes _PROVIDER_MODELS
- Add new providers: kimi-coding-cn, moonshot, arcee
- Fix provider key naming to match Hermes (kilo→kilocode, vercel→ai-gateway, etc.)
- Ensure custom_providers from config.yaml always appear in available-models
- Append configured default model to model list if not in catalog
- Fix provider deletion with case-insensitive key matching
- Add selectOrInput i18n key to all 8 locales

Closes #24

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

packages/client/src/i18n/locales/en.ts

@@ -189,6 +189,7 @@ export default {
     apiKey: 'API Key',
     apiKeyPlaceholder: 'sk-...',
     defaultModel: 'Default Model',
+    selectOrInput: 'Select or type a model name...',
     selectModel: 'Select a model...',
     providerAdded: 'Provider added',
     providerDeleted: 'Provider deleted',