fix: 修复蓝牙连接误报与 WiFi 列表获取问题，完善一键添加本人

- connectedDevice 忽略 connect 过程中的 UNAVAILABLE 抖动，避免误报蓝牙关闭
- getWifiList 加 settled 保护，onStartSearch 加防重入
- userManagement 一键添加本人（仅加后台、不下发设备）

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

miniprogram/lefu/service.ts

@@ -324,25 +324,28 @@ class LeFuService {
 				reject(new Error('设备未连接，无法获取 WiFi 列表'))
 				return
 			}
+			let settled = false
 			let timer: number | null = null
 			let delayTimer: number | null = null
-			// 15s 整体超时
-			timer = setTimeout(() => {
+			const settle = (err: Error | null, data: LeFuWifiItem[] = []) => {
+				if (settled) return
+				settled = true
+				if (timer !== null) { clearTimeout(timer); timer = null }
 				if (delayTimer !== null) { clearTimeout(delayTimer); delayTimer = null }
-				reject(new Error('获取 WiFi 列表超时'))
-			}, 15000)
+				err ? reject(err) : resolve(data)
+			}
+			// 15s 整体超时
+			timer = setTimeout(() => settle(new Error('获取 WiFi 列表超时')), 15000)
 			// 延时 2s 后下发查询指令（等待设备进入配网模式）
 			delayTimer = setTimeout(() => {
 				this._activeProtocol.dataFindSurroundDevice((res: any[]) => {
-					if (timer !== null) { clearTimeout(timer); timer = null }
-					if (delayTimer !== null) { clearTimeout(delayTimer); delayTimer = null }
 					console.log(TAG, 'getWifiList 结果:', res)
 					if (!res?.length) {
 						this._activeProtocol.dataExitWifiConfig(() => { })
-						resolve([])
+						settle(null, [])
 						return
 					}
-					resolve(res.map((item: any) => ({ ssid: item.ssid || item.name || '', signal: item.signal })))
+					settle(null, res.map((item: any) => ({ ssid: item.ssid || item.name || '', signal: item.signal })))
 				})
 			}, 2000)
 		})