fix(permission): 适配权限提示对话框暗黑模式

- 获取当前主题模式判断是否为暗黑模式
- 权限提示对话框背景色根据主题切换
- 调整标题和内容文字颜色以适配暗黑模式
- 修改按钮样式颜色使其在暗黑模式下更清晰
- 优化对话框内文本样式，提升视觉体验

lib/core/utils/permission_util.dart

@@ -164,6 +164,12 @@ class PermissionUtil {
     required String permissionName,
     required String explanationText,
   }) {
+    // 获取当前主题模式
+    final context = Get.context;
+    final isDarkMode = context != null
+        ? Theme.of(context).brightness == Brightness.dark
+        : false;
+
     Get.dialog(
       Stack(
         children: [
@@ -174,7 +180,7 @@ class PermissionUtil {
             child: Material(
               borderRadius: BorderRadius.circular(12),
               elevation: 8,
-              color: Colors.grey[300],
+              color: isDarkMode ? const Color(0xFF2D2D2D) : Colors.grey[300],
               shadowColor: Colors.black.withValues(alpha: 0.3),
               child: Padding(
                 padding: const EdgeInsets.all(16),
@@ -186,15 +192,19 @@ class PermissionUtil {
                       'permissionUtilNeed'.tr +
                           permissionName +
                           'permissionUtilPermission'.tr,
-                      style: const TextStyle(
+                      style: TextStyle(
                         fontWeight: FontWeight.bold,
                         fontSize: 16,
+                        color: isDarkMode ? Colors.white : Colors.black87,
                       ),
                     ),
                     const SizedBox(height: 8),
                     Text(
                       explanationText,
-                      style: const TextStyle(fontSize: 14),
+                      style: TextStyle(
+                        fontSize: 14,
+                        color: isDarkMode ? Colors.white70 : Colors.black54,
+                      ),
                     ),
                   ],
                 ),
@@ -227,18 +237,38 @@ class PermissionUtil {
   }) async {
     Logger.i('PermissionUtil', '显示永久拒绝对话框 ($permissionName)');
 
+    // 获取当前主题模式
+    final context = Get.context;
+    final isDarkMode = context != null
+        ? Theme.of(context).brightness == Brightness.dark
+        : false;
+
     bool? userChoice = await Get.dialog(
       AlertDialog(
-        title: Text('permissionUtilNeed'.tr +
+        backgroundColor: isDarkMode ? const Color(0xFF2D2D2D) : Colors.white,
+        title: Text(
+          'permissionUtilNeed'.tr +
               permissionName +
-            'permissionUtilPermission'.tr),
-        content: Text(permanentDenialText),
+              'permissionUtilPermission'.tr,
+          style: TextStyle(
+            color: isDarkMode ? Colors.white : Colors.black87,
+          ),
+        ),
+        content: Text(
+          permanentDenialText,
+          style: TextStyle(
+            color: isDarkMode ? Colors.white70 : Colors.black54,
+          ),
+        ),
         actions: [
           TextButton(
             onPressed: () {
               Logger.d('PermissionUtil', '用户取消设置 ($permissionName)');
               Get.back(result: false);
             },
+            style: TextButton.styleFrom(
+              foregroundColor: isDarkMode ? Colors.white70 : Colors.grey[700],
+            ),
             child: Text(cancelButtonText),
           ),
           ElevatedButton(
@@ -246,6 +276,11 @@ class PermissionUtil {
               Logger.d('PermissionUtil', '用户同意前往设置 ($permissionName)');
               Get.back(result: true);
             },
+            style: ElevatedButton.styleFrom(
+              backgroundColor:
+                  isDarkMode ? const Color(0xFF0066CC) : Colors.blue,
+              foregroundColor: Colors.white,
+            ),
             child: Text(settingsButtonText),
           ),
         ],