feat: complete stage 1 infrastructure

src/lib/api/usage.ts

@@ -0,0 +1,15 @@
+import { invoke } from "@tauri-apps/api/core";
+import type { UsageResult } from "@/types";
+import type { AppType } from "./types";
+
+export const usageApi = {
+  async query(providerId: string, appType: AppType): Promise<UsageResult> {
+    return await invoke("query_provider_usage", {
+      provider_id: providerId,
+      providerId: providerId,
+      app_type: appType,
+      app: appType,
+      appType,
+    });
+  },
+};