fix(platform-detector): 扩展天翼云盘首页路径识别范围

当访问天翼云盘首页（`/web/main/`）时，返回 `esurfing` 平台标识

src/utils/platform-detector.ts

@@ -115,7 +115,7 @@ export function detectPlatformFromUrl(url: string, pathname?: string): PlatformN
   // 天翼云盘
   if (url.includes('cloud.189.cn')) {
     const pathToCheck = pathname ?? extractPathnameFromUrl(url);
-    return pathToCheck.startsWith('/web/main/file') ? 'esurfing' : null;
+    return pathToCheck === '/web/main' || pathToCheck === '/web/main/' || pathToCheck.startsWith('/web/main/file') ? 'esurfing' : null;
   }
 
   // UC网盘

tests/unit/platform-detection.test.ts

@@ -242,6 +242,14 @@ describe('Platform Detection - Unified Utils', () => {
         expect(result).toBe('cmcc');
       });
 
+      it('should detect Esurfing Drive entry page before navigating into file lists', () => {
+        const result = detectPlatformFromUrl(
+          'https://cloud.189.cn/web/main/',
+          '/web/main/'
+        );
+        expect(result).toBe('esurfing');
+      });
+
       it('should detect Esurfing Drive', () => {
         const result = detectPlatformFromUrl(
           'https://cloud.189.cn/web/main/file/folder/folder189',