fix: persist execution.dryrun setting and add headless mode option for User

- Add EXECUTION_DRYRUN to save_to_env() to fix dryrun setting not persisting
  after restart
- Add headless mode checkbox in User mode settings for browser visibility control

Co-Authored-By: Claude (glm-5) <noreply@anthropic.com>

config/loader.py

@@ -162,6 +162,8 @@ class ConfigLoader:
             "VALIDATION_ENABLE_CRUD": config.validation.enable_crud_operations,
             "VALIDATION_DEFAULT_MANAGER": config.validation.default_manager,
             "VALIDATION_MATCH_MODE": config.validation.match_mode,
+            # 执行配置
+            "EXECUTION_DRYRUN": config.execution.dryrun,
         }
 
         return save_env_file(env_file, env_dict)

gui/settings_tab.py

@@ -333,12 +333,26 @@ class SettingsTab(ttk.Frame):
         ).grid(row=0, column=0, sticky="w", pady=5)
 
         # 说明文字
-        hint_label = ttk.Label(
+        dryrun_hint = ttk.Label(
             group,
             text="提示：勾选后，执行删除操作时将只预览不实际保存，用于测试流程。",
             foreground="gray",
         )
-        hint_label.grid(row=1, column=0, sticky="w", pady=(0, 5))
+        dryrun_hint.grid(row=1, column=0, sticky="w", pady=(0, 5))
+
+        # 无头模式设置
+        self.user_headless_var = tk.BooleanVar(value=True)
+        ttk.Checkbutton(
+            group, text="无头模式 (不显示浏览器)", variable=self.user_headless_var
+        ).grid(row=2, column=0, sticky="w", pady=5)
+
+        # 说明文字
+        headless_hint = ttk.Label(
+            group,
+            text="提示：勾选后浏览器将在后台运行，不显示窗口。",
+            foreground="gray",
+        )
+        headless_hint.grid(row=3, column=0, sticky="w", pady=(0, 5))
 
     def _create_extraction_group(self, parent):
         """创建处理配置组"""
@@ -516,6 +530,8 @@ class SettingsTab(ttk.Frame):
             )
             # 执行设置
             self.user_dryrun_var.set(self.config.get("execution.dryrun", False))
+            # 无头模式
+            self.user_headless_var.set(self.config.get("erp.headless", True))
             return
 
         # 管理员模式 - 加载所有配置
@@ -612,6 +628,8 @@ class SettingsTab(ttk.Frame):
             )
             # 保存执行设置
             self.config.set("execution.dryrun", self.user_dryrun_var.get())
+            # 无头模式
+            self.config.set("erp.headless", self.user_headless_var.get())
 
             # 保存到文件
             if self.config.save():