Send want_config_id on connect to trigger initial sync (#6)

Send want_config_id on connect to trigger initial sync (#6)

Firmware only streams myInfo/channels/configComplete after receiving a
ToRadio with want_config_id — the service previously wrote nothing on
connect, so /api/channels stayed [] and myNodeNum null. v0.1.4.

src/mesh/mesh.service.ts

@@ -9,8 +9,10 @@ import * as net from 'node:net';
 import {
   PORT_TEXT_MESSAGE_APP,
   buildTextToRadio,
+  buildWantConfigToRadio,
   decodeFromRadio,
   extractFrames,
+  frame,
 } from './codec.js';
 
 @Injectable()
@@ -94,6 +96,13 @@ export class MeshService implements OnModuleInit, OnModuleDestroy {
       // fresh sync on every (re)connect — drop stale channels from the old session
       this.channelMap = new Map();
       this.logger.log(`bridge connected ${this.host}:${this.port}`);
+      const nonce = Math.floor(Math.random() * 0xffffffff) || 1;
+      buildWantConfigToRadio(nonce)
+        .then((bytes) => socket.write(frame(bytes)))
+        .catch((err: unknown) =>
+          this.logger.error(`want_config failed: ${String(err)}`),
+        );
+      this.logger.log(`requested initial sync (want_config_id=${nonce})`);
     });
     socket.on('data', (chunk) => {
       const merged = new Uint8Array(this.buffer.length + chunk.length);