fix: wait for NM auto-reconnect before starting AP on reboot

After WiFi is configured and device reboots, NetworkManager needs
a few seconds to auto-connect to saved WiFi. Without waiting,
AP starts immediately and occupies wlan0, preventing NM reconnect.

- Add hasSavedWifiConnection() to check for saved WiFi profiles
- Wait up to 20s for NM auto-connect before falling back to AP
- First boot (no saved WiFi) still starts AP immediately

Made-with: Cursor

lib/provisioning.js

@@ -2,16 +2,19 @@
 
 const EventEmitter = require('events');
 const log = require('./logger');
-const { hasInternet, isWifiStaConnected, startAP, stopAP, connectWifi, AP_IP } = require('./network');
+const { hasInternet, hasSavedWifiConnection, isWifiStaConnected, startAP, stopAP, connectWifi, AP_IP } = require('./network');
 const { DnsHijack }    = require('./dns-hijack');
 const { CaptiveServer } = require('./captive-server');
 
 const MONITOR_INTERVAL_MS = 30_000;
+const BOOT_WAIT_MAX_MS    = 20_000; // 等待 NM 自动连接的最大时间
+const BOOT_POLL_MS        = 2_000;  // 轮询间隔
 
 /**
  * AP 常驻配网管理器。
  *
  * 规则：
+ *   - 启动时：有已保存 WiFi 配置 → 等 NM 自动连接（最多 20 秒）
  *   - wlan0 没有以 STA 模式连接 WiFi → 开 AP + DNS 劫持 + HTTP 配网页
  *   - 用户提交 WiFi 凭证 → 关 AP → 尝试连接 → 失败则重新开 AP
  *   - 运行中 WiFi 断开 → 自动重新开 AP
@@ -27,20 +30,62 @@ class ProvisionManager extends EventEmitter {
     this._monitorTimer = null;
   }
 
-  start() {
+  async start() {
+    // WiFi 已连接 → 直接进入 STA 模式
     if (isWifiStaConnected()) {
       this._state = 'sta';
       log.info('provision', 'WiFi STA 已连接，AP 不启动');
-    } else {
-      this._enterAP();
+      this._emitNetworkReady();
+      this._startMonitor();
+      return;
     }
+
+    // 有已保存的 WiFi 配置 → 等 NM 自动连接（重启场景）
+    if (hasSavedWifiConnection()) {
+      log.info('provision', '发现已保存的 WiFi 配置，等待 NetworkManager 自动连接...');
+      const connected = await this._waitForWifiConnect();
+      if (connected) {
+        this._state = 'sta';
+        log.info('provision', 'WiFi 自动连接成功，AP 不启动');
+        this._emitNetworkReady();
+        this._startMonitor();
+        return;
+      }
+      log.warn('provision', 'WiFi 自动连接超时，启动 AP');
+    }
+
+    // 没有已保存 WiFi 或等待超时 → 开 AP
+    this._enterAP();
     this._startMonitor();
 
     if (hasInternet()) {
-      this.emit('network-ready');
+      this._emitNetworkReady();
     }
   }
 
+  _emitNetworkReady() {
+    if (hasInternet()) this.emit('network-ready');
+  }
+
+  /**
+   * 轮询等待 NM 自动连接 WiFi，最多等 BOOT_WAIT_MAX_MS
+   */
+  _waitForWifiConnect() {
+    return new Promise(resolve => {
+      let elapsed = 0;
+      const timer = setInterval(() => {
+        elapsed += BOOT_POLL_MS;
+        if (isWifiStaConnected()) {
+          clearInterval(timer);
+          resolve(true);
+        } else if (elapsed >= BOOT_WAIT_MAX_MS) {
+          clearInterval(timer);
+          resolve(false);
+        }
+      }, BOOT_POLL_MS);
+    });
+  }
+
   stop() {
     this._stopMonitor();
     this._stopAll();