fix(server): clean up bridge and hybrid shutdown handling

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartvpn',
-  version: '1.19.1',
+  version: '1.19.2',
   description: 'A VPN solution with TypeScript control plane and Rust data plane daemon'
 }

ts/smartvpn.classes.vpnserver.ts

@@ -333,17 +333,35 @@ export class VpnServer extends plugins.events.EventEmitter {
   /**
    * Stop the daemon bridge.
    */
-  public stop(): void {
+  public async stop(): Promise<void> {
     // Clean up nftables rules
     if (this.nftHealthInterval) {
       clearInterval(this.nftHealthInterval);
       this.nftHealthInterval = undefined;
     }
     if (this.nft) {
-      this.nft.cleanup().catch(() => {}); // best-effort cleanup
+      try {
+        await this.nft.cleanup();
+      } catch (e) {
+        console.warn(`[smartvpn] nftables cleanup failed: ${e}`);
+      }
       this.nft = undefined;
     }
+
+    // Wait for bridge process to exit (with timeout)
+    const exitPromise = new Promise<void>((resolve) => {
+      if (!this.bridge.running) {
+        resolve();
+        return;
+      }
+      const timeout = setTimeout(() => resolve(), 5000);
+      this.bridge.once('exit', () => {
+        clearTimeout(timeout);
+        resolve();
+      });
+    });
     this.bridge.stop();
+    await exitPromise;
   }
 
   /**