Added image generation to blog writer

frontend/src/utils/imageBus.ts

@@ -0,0 +1,18 @@
+type ImagePayload = { base64: string; provider?: string; model?: string };
+
+const subscribers = new Set<(p: ImagePayload) => void>();
+
+export function publishImage(payload: ImagePayload) {
+  subscribers.forEach((cb) => {
+    try { cb(payload); } catch {}
+  });
+}
+
+export function subscribeImage(cb: (p: ImagePayload) => void) {
+  subscribers.add(cb);
+  return () => {
+    subscribers.delete(cb);
+  };
+}
+
+