feat: DBNetClient Loop命令完善 + vd960DBN 发送调试打印

vd960DBN:
- loop_uart_proto.c: 所有发送函数添加 LUP Tx 调试打印
- tcp_json_srv.c: 新增 loop_version_query/loop_reset/loop_factory_init/
  loop_sens_read/loop_sens_write 命令处理器 + 延迟响应解析
- 修复 loop_sens_write 未设置命令状态机和错误使用解析函数的问题

DBNetClient:
- tcp_json_client.py: 新增 full Loop MCU API (6 条命令)
- main.py: 线圈参数标签页增加版本/复位/出厂/灵敏度操作按钮

DBNetClient/main.py

@@ -184,14 +184,44 @@ class DBNetApp:
 
     def _tab_loop(self, parent):
         f = ttk.Frame(parent, padding=10)
-        ttk.Button(f, text="查询线圈参数 (loop_param_query)",
-                   command=self._do_loop_param_query).pack(anchor=tk.W, pady=3)
-        ttk.Label(f, text="参数设置通过 BLE/小程序，或 Raw JSON 标签页发送。",
-                  foreground="gray").pack(anchor=tk.W, pady=5)
 
-        self.loop_text = scrolledtext.ScrolledText(f, height=12, wrap=tk.WORD,
+        # Row 0: Version + System
+        ttk.Label(f, text="地感MCU 操作:", font=("", 10, "bold")).grid(row=0, column=0, sticky=tk.W, pady=(0,5))
+        btn_row = ttk.Frame(f)
+        btn_row.grid(row=1, column=0, columnspan=2, sticky=tk.W, pady=2)
+        ttk.Button(btn_row, text="查询版本", command=self._do_loop_version).pack(side=tk.LEFT, padx=2)
+        ttk.Button(btn_row, text="复位MCU", command=self._do_loop_reset).pack(side=tk.LEFT, padx=2)
+        ttk.Button(btn_row, text="出厂初始化", command=self._do_loop_factory_init).pack(side=tk.LEFT, padx=2)
+
+        ttk.Separator(f, orient=tk.HORIZONTAL).grid(row=2, column=0, columnspan=2,
+                                                      sticky=tk.EW, pady=8)
+
+        # Row 3: 灵敏度
+        ttk.Label(f, text="线圈灵敏度 (0x8A):", font=("", 10, "bold")).grid(row=3, column=0, sticky=tk.W)
+        sens_row = ttk.Frame(f)
+        sens_row.grid(row=4, column=0, columnspan=2, sticky=tk.W, pady=2)
+        ttk.Button(sens_row, text="读取灵敏度", command=self._do_loop_sens_read).pack(side=tk.LEFT, padx=2)
+
+        ttk.Separator(f, orient=tk.HORIZONTAL).grid(row=5, column=0, columnspan=2,
+                                                      sticky=tk.EW, pady=8)
+
+        # Row 6: 参数
+        ttk.Label(f, text="线圈参数 (0x63/0x64):", font=("", 10, "bold")).grid(row=6, column=0, sticky=tk.W)
+        param_row = ttk.Frame(f)
+        param_row.grid(row=7, column=0, columnspan=2, sticky=tk.W, pady=2)
+        ttk.Button(param_row, text="查询参数", command=self._do_loop_param_query).pack(side=tk.LEFT, padx=2)
+        ttk.Label(param_row, text="参数设置通过 Raw JSON 标签页发送 loop_param_set。",
+                  foreground="gray").pack(side=tk.LEFT, padx=10)
+
+        ttk.Separator(f, orient=tk.HORIZONTAL).grid(row=8, column=0, columnspan=2,
+                                                      sticky=tk.EW, pady=8)
+
+        # Response display
+        self.loop_text = scrolledtext.ScrolledText(f, height=14, wrap=tk.WORD,
                                                     font=("Consolas", 9))
-        self.loop_text.pack(fill=tk.BOTH, expand=True)
+        self.loop_text.grid(row=9, column=0, columnspan=2, sticky="nsew")
+        f.rowconfigure(9, weight=1)
+        f.columnconfigure(0, weight=1)
         return f
 
     def _tab_system(self, parent):
@@ -418,7 +448,27 @@ class DBNetApp:
                 topic_sub=self.iot_vars["topic_sub"].get().strip()),
             lambda r: self._show_label(self.iot_resp, r))
 
-    # Loop
+    # Loop MCU
+    def _do_loop_version(self):
+        self._bg_run(lambda: self.client.loop_version_query(),
+                     lambda r: self._show_resp(self.loop_text, r))
+
+    def _do_loop_reset(self):
+        if not messagebox.askyesno("确认", "复位地感MCU，确定？"):
+            return
+        self._bg_run(lambda: self.client.loop_reset(),
+                     lambda r: self._show_resp(self.loop_text, r))
+
+    def _do_loop_factory_init(self):
+        if not messagebox.askyesno("确认", "地感MCU恢复出厂设置，确定？"):
+            return
+        self._bg_run(lambda: self.client.loop_factory_init(),
+                     lambda r: self._show_resp(self.loop_text, r))
+
+    def _do_loop_sens_read(self):
+        self._bg_run(lambda: self.client.loop_sens_read(),
+                     lambda r: self._show_resp(self.loop_text, r))
+
     def _do_loop_param_query(self):
         self._bg_run(lambda: self.client.loop_param_query(),
                      lambda r: self._show_resp(self.loop_text, r))