feat(esp32): 添加多电机OTA中继功能并优化调试日志系统

- 新增多电机状态、版本和OTA中继监控模块（monitor/motor_state.cpp,
  monitor/motor_version.cpp, monitor/motor_ota_relay.cpp）
- 在CAN反馈任务中添加0xC5/0xC6/0xD2类型消息处理，支持多电机状态推送
- 重构调试日志系统，将一次性JSON分配改为512B栈缓冲流式发送，降低内存峰值
- 调试UART波特率从115200提升至30000
- 修改版本管理方式，从自动生version.h改为手动维护
- 更新VSCode设置以支持ESP-IDF开发环境配置
- 在OTA协调器中添加电机OTA互斥机制，防止并发冲突
- 完善中继状态机异常处理，添加远程取消通知机制

tools/can.html

@@ -4,19 +4,28 @@
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title>ESP32 CAN 通信控制台</title>
-<link rel="stylesheet" href="css/base.css?v=7d5f4eef">
-<link rel="stylesheet" href="css/layout.css?v=a3e0b7e2">
-<link rel="stylesheet" href="css/components.css?v=475fa1ac">
-<link rel="stylesheet" href="css/can.css?v=8a9342b7">
-<link rel="stylesheet" href="css/responsive.css?v=61b66182">
+<link rel="stylesheet" href="css/base.css?v=857f83a5">
+<link rel="stylesheet" href="css/layout.css?v=acd17001">
+<link rel="stylesheet" href="css/components.css?v=7bc7d5db">
+<link rel="stylesheet" href="css/can.css?v=c06f5688">
+<link rel="stylesheet" href="css/responsive.css?v=46449483">
 </head>
 <body class="can-page">
 <div class="container can-container">
 
   <header class="header-bar can-header">
     <div class="header-brand">
-      <span class="dot-mark"></span>
-      <strong>ESP32 CAN 通信控制台</strong>
+      <span class="brand-logo" aria-hidden="true">
+        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.7" stroke-linecap="round" stroke-linejoin="round">
+          <rect x="6" y="6" width="12" height="12" rx="2.5"/>
+          <rect x="9.5" y="9.5" width="5" height="5" rx="1" fill="currentColor" stroke="none" opacity=".85"/>
+          <path d="M9 2v3M15 2v3M9 19v3M15 19v3M2 9h3M2 15h3M19 9h3M19 15h3"/>
+        </svg>
+      </span>
+      <div class="brand-text">
+        <strong>ESP32 CAN 通信控制台</strong>
+        <span class="brand-sub">DCU · Robot_v2 · CAN FD</span>
+      </div>
     </div>
     <div class="header-status">
       <span class="pill offline" id="canConnPill"><span class="indicator"></span><span id="canConnTxt">未连接</span></span>