Refactor clawx (#344)

Co-authored-by: ashione <skyzlxuan@gmail.com>

electron/api/event-bus.ts

@@ -0,0 +1,36 @@
+import type { ServerResponse } from 'http';
+
+type EventPayload = unknown;
+
+export class HostEventBus {
+  private readonly clients = new Set<ServerResponse>();
+
+  addSseClient(res: ServerResponse): void {
+    this.clients.add(res);
+    res.on('close', () => {
+      this.clients.delete(res);
+    });
+  }
+
+  emit(eventName: string, payload: EventPayload): void {
+    const message = `event: ${eventName}\ndata: ${JSON.stringify(payload)}\n\n`;
+    for (const client of this.clients) {
+      try {
+        client.write(message);
+      } catch {
+        this.clients.delete(client);
+      }
+    }
+  }
+
+  closeAll(): void {
+    for (const client of this.clients) {
+      try {
+        client.end();
+      } catch {
+        // Ignore individual client close failures.
+      }
+    }
+    this.clients.clear();
+  }
+}