feat(quota): add NanoGPT quota provider support (#424)

* feat: add NanoGPT quota provider and usage fetch

Detect NanoGPT as a configured quota provider.
Expose daily and monthly usage windows with reset times.
Return configured and ok state based on API key presence.

* feat: fetch NanoGPT quota and detect config

Detect NanoGPT in configured providers from auth.
Fetch and expose daily and monthly usage windows for NanoGPT.

* feat: add NanoGPT quota provider option

packages/ui/src/lib/quota/providers/index.ts

@@ -11,6 +11,7 @@ export const QUOTA_PROVIDERS: QuotaProviderMeta[] = [
   { id: 'github-copilot', name: 'GitHub Copilot' },
   { id: 'google', name: 'Google' },
   { id: 'kimi-for-coding', name: 'Kimi for Coding' },
+  { id: 'nano-gpt', name: 'NanoGPT' },
   { id: 'openrouter', name: 'OpenRouter' },
   { id: 'zai-coding-plan', name: 'z.ai' },
 ];

packages/ui/src/types/quota.ts

@@ -6,6 +6,7 @@ export type QuotaProviderId =
   | 'github-copilot-addon'
   | 'google'
   | 'kimi-for-coding'
+  | 'nano-gpt'
   | 'openrouter'
   | 'zai-coding-plan';