对接用户协议和隐私政策

lib/features/auth/presentation/pages/login_page_v2.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:maibu_satabot_v2/components/legal_document.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:go_router/go_router.dart';
 import 'package:maibu_satabot_v2/components/app_logo.dart';
@@ -547,13 +548,13 @@ class _LoginPageV2State extends State<LoginPageV2>
                 style: const TextStyle(fontSize: 13, color: _grayText),
               ),
               _protocolText(loc.translate('login.user_agreement_link'),
-                  () => _showProtocolDetail(loc.translate('login.user_agreement_link'))),
+                  () => openLegalDocument(context, LegalDocument.terms)),
               Text(
                 loc.translate('login.agree_and'),
                 style: const TextStyle(fontSize: 13, color: _grayText),
               ),
               _protocolText(loc.translate('login.privacy_policy_link'),
-                  () => _showProtocolDetail(loc.translate('login.privacy_policy_link'))),
+                  () => openLegalDocument(context, LegalDocument.privacy)),
             ],
           ),
         ),
@@ -594,66 +595,7 @@ class _LoginPageV2State extends State<LoginPageV2>
   }
   */
 
-  void _showProtocolDetail(String title) {
-    showModalBottomSheet(
-      context: context,
-      isScrollControlled: true,
-      backgroundColor: Colors.white,
-      shape: const RoundedRectangleBorder(
-        borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
-      ),
-      builder: (context) => Container(
-        padding: const EdgeInsets.all(24),
-        height: MediaQuery.of(context).size.height * 0.7,
-        child: Column(
-          children: [
-            Text(
-              title,
-              style: const TextStyle(
-                fontSize: 18,
-                fontWeight: FontWeight.bold,
-                color: _navy,
-              ),
-            ),
-            const Divider(height: 32, color: _inputBorder),
-            Expanded(
-              child: SingleChildScrollView(
-                child: Text(
-                  (AppLocalizations.of(context)
-                              .translate('login.protocol_detail_text')
-                              .replaceAll('%s', title) +
-                          '\n') *
-                      20,
-                  style: const TextStyle(
-                    color: _tabUnselectedText,
-                    height: 1.5,
-                  ),
-                ),
-              ),
-            ),
-            const SizedBox(height: 16),
-            SizedBox(
-              width: double.infinity,
-              child: ElevatedButton(
-                onPressed: () => Navigator.pop(context),
-                style: ElevatedButton.styleFrom(
-                  backgroundColor: _primaryBlue,
-                  foregroundColor: Colors.white,
-                  elevation: 0,
-                  padding: const EdgeInsets.symmetric(vertical: 14),
-                  shape: RoundedRectangleBorder(
-                    borderRadius: BorderRadius.circular(12),
-                  ),
-                ),
-                child: Text(AppLocalizations.of(context)
-                    .translate('login.understood')),
-              ),
-            ),
-          ],
-        ),
-      ),
-    );
-  }
+
 }
 
 /// 主按钮：横向蓝色渐变胶囊（#2BAFFE → #1C96F6 → #0B7DEE），带前置箭头。