feat: implement browser extension for media publishing and add backend support for media management

apps/browser-extension/src/adapters/index.ts

@@ -0,0 +1,26 @@
+import type { StoredPlatformState } from "../platforms";
+
+import type { AdapterContext, PlatformAdapter, PlatformPublishResult } from "./types";
+import { zhihuAdapter } from "./zhihu";
+
+const adapters = new Map<string, PlatformAdapter>([[zhihuAdapter.platformId, zhihuAdapter]]);
+
+export function getPlatformAdapter(platformId: string): PlatformAdapter | undefined {
+  return adapters.get(platformId);
+}
+
+export async function detectPlatformState(platform: StoredPlatformState): Promise<StoredPlatformState> {
+  const adapter = getPlatformAdapter(platform.platform_id);
+  if (!adapter) {
+    return platform;
+  }
+  return adapter.detect(platform);
+}
+
+export async function publishViaAdapter(platformId: string, context: AdapterContext): Promise<PlatformPublishResult | null> {
+  const adapter = getPlatformAdapter(platformId);
+  if (!adapter) {
+    return null;
+  }
+  return adapter.publish(context);
+}