feat(ota): 统一BLE/WiFi OTA协调器接口并优化并发控制

- 添加 beginEsp32OtaWithRetry 统一重试逻辑，防止锁残留导致的并发问题
- 实现 finalizeForReboot 和 restartEsp32 统一封装收尾重启流程
- 修复BLE/WiFi双通道并发OTA的安全隐患，增强系统状态检查

refactor(ota): 优化SHA计算内存管理

- 使用静态缓冲区替代动态分配，减少内存碎片
- 重构OTA协调器状态机，增强错误处理机制

perf(monitor): 增强堆内存监控功能

- 添加最大空闲块大小监控，提供更详细的内存状态信息
- 更新健康监测算法，提高内存异常检测准确性

tools/index.html

@@ -20,7 +20,6 @@
       <span class="pill" id="pillVer">v--</span>
       <span class="pill" id="pillIP">--</span>
       <span class="pill" id="pillRSSI">--</span>
-      <span class="pill idle" id="pillRelay"><span class="indicator"></span><span id="pillRelayTxt">待机</span></span>
       <span class="pill" id="pillUptime">运行 --</span>
     </div>
     <div class="header-sub">
@@ -370,7 +369,7 @@
   <span id="toastMsg">操作成功</span>
 </div>
 
-<script src="app.js?v=20260617b"></script>
+<script src="app.js?v=20260619c"></script>
 <script>
 window.connectionMode = window.connectionMode || 'wifi';
 window.flashTarget = window.flashTarget || 'esp32';
@@ -415,6 +414,9 @@ window.sharedFirmwareFiles = window.sharedFirmwareFiles || {
     syncBleFileFromSelectedTarget();
     if (isBle) {
       window.switchStageFlow('ble');
+      if (typeof setActivePhase === 'function') {
+        setActivePhase(window.flashTarget === 'gd32' ? 'gd32Ota' : 'esp32Ota');
+      }
       if (window.bleOta && typeof window.bleOta.refreshButtons === 'function') {
         window.bleOta.refreshButtons();
       }
@@ -429,6 +431,9 @@ window.sharedFirmwareFiles = window.sharedFirmwareFiles || {
     syncBleFileFromSelectedTarget();
     if (window.connectionMode === 'ble') {
       window.switchStageFlow('ble');
+      if (typeof setActivePhase === 'function') {
+        setActivePhase(target === 'gd32' ? 'gd32Ota' : 'esp32Ota');
+      }
     } else {
       window.switchStageFlow(window.flashTarget);
     }