get frontend code generating and usable

cmd/cli/templates/vue/fetch-rpc.ts.tmpl

@@ -0,0 +1,26 @@
+export interface Rpc {
+  request(service: string, method: string, data: Uint8Array): Promise<Uint8Array>;
+}
+
+export class FetchRpc implements Rpc {
+  constructor(private baseUrl: string) {}
+
+  async request(service: string, method: string, data: Uint8Array): Promise<Uint8Array> {
+    const url = `${this.baseUrl}/${service}/${method}`;
+    // Optionally, convert or wrap data as needed by your grpc-gateway.
+    const jsonBody = JSON.stringify({ message: Array.from(data) });
+
+    const response = await fetch(url, {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      body: jsonBody,
+    });
+
+    if (!response.ok) {
+      throw new Error(`HTTP error: ${response.status}`);
+    }
+
+    const responseJson = await response.json();
+    return new Uint8Array(responseJson.message);
+  }
+}