feat(frontend): add typed backend API client (openapi-fetch) with codegen script

frontend/src/lib/api/schema.d.ts

@@ -0,0 +1,4 @@
+export type paths = Record<string, never>;
+export type webhooks = Record<string, never>;
+export type components = Record<string, never>;
+export type operations = Record<string, never>;

frontend/src/lib/server/api.ts

@@ -0,0 +1,16 @@
+import createClient from 'openapi-fetch';
+import type { paths } from '$lib/api/schema';
+import { apiConfig } from '$lib/server/config';
+
+interface ApiClientOptions {
+	fetch: typeof fetch;
+	accessToken?: string;
+}
+
+export function createApiClient({ fetch, accessToken }: ApiClientOptions) {
+	return createClient<paths>({
+		baseUrl: apiConfig.baseUrl,
+		fetch,
+		headers: accessToken ? { Authorization: `Bearer ${accessToken}` } : undefined
+	});
+}

frontend/src/lib/server/config.ts

@@ -45,3 +45,9 @@ export const authConfig = {
 		return env.AUTH_ALLOW_INSECURE_HTTP === 'true';
 	}
 };
+
+export const apiConfig = {
+	get baseUrl() {
+		return (env.API_BASE_URL ?? '').replace(/\/+$/, '');
+	}
+};