feat(web-admin): add mp webview shell and /m/pl/plan static routes.

Co-authored-by: Cursor <cursoragent@cursor.com>

web-admin/src/api/mp-webview.ts

@@ -0,0 +1,15 @@
+import request from '@/utils/http'
+
+export const mpWebviewApi = {
+  exchange: (ticket: string) =>
+    request.post<{
+      token: string
+      refreshToken: string
+      expiresIn: number
+      userInfo: Api.Auth.UserInfo
+    }>({
+      url: '/web/auth/mp-webview-exchange',
+      data: { ticket },
+      showErrorMessage: false
+    })
+}