feat: collapse WebDAV config after success, show modify button

tiku-client/lib/pages/settings/settings_page.dart

@@ -17,6 +17,8 @@ class _SettingsPageState extends ConsumerState<SettingsPage> {
   final _webdavUserCtrl = TextEditingController();
   final _webdavPassCtrl = TextEditingController();
   bool _isConnecting = false;
+  bool _webdavConfigured = false;
+  bool _showWebdavForm = false;
   String? _error;
 
   @override
@@ -33,10 +35,14 @@ class _SettingsPageState extends ConsumerState<SettingsPage> {
     final api = ref.read(apiServiceProvider);
     try {
       final data = await api.getWebDAVConfig();
-      if (data['configured'] == true) {
-        _webdavUrlCtrl.text = data['url'] ?? '';
-        _webdavUserCtrl.text = data['username'] ?? '';
-      }
+      setState(() {
+        _webdavConfigured = data['configured'] == true;
+        _showWebdavForm = !_webdavConfigured;
+        if (_webdavConfigured) {
+          _webdavUrlCtrl.text = data['url'] ?? '';
+          _webdavUserCtrl.text = data['username'] ?? '';
+        }
+      });
     } catch (_) {}
   }
 
@@ -53,12 +59,13 @@ class _SettingsPageState extends ConsumerState<SettingsPage> {
     setState(() { _isConnecting = true; _error = null; });
     final ok = await ref.read(connectionProvider.notifier).connect(url, token);
     if (!mounted) return;
-    setState(() { _isConnecting = false; if (!ok) _error = '连接失败'; });
+    setState(() { _isConnecting = false; if (!ok) _error = '连接失败'; else _loadWebDAVConfig(); });
   }
 
   Future<void> _disconnect() async {
     await ref.read(connectionProvider.notifier).disconnect();
     _urlCtrl.clear(); _tokenCtrl.clear();
+    _webdavConfigured = false; _showWebdavForm = false;
   }
 
   Future<void> _saveWebDAV() async {
@@ -69,6 +76,10 @@ class _SettingsPageState extends ConsumerState<SettingsPage> {
         _webdavUserCtrl.text.trim(),
         _webdavPassCtrl.text.trim(),
       );
+      setState(() {
+        _webdavConfigured = true;
+        _showWebdavForm = false;
+      });
       if (mounted) {
         ScaffoldMessenger.of(context).showSnackBar(
           const SnackBar(content: Text('WebDAV 配置已保存')),
@@ -159,41 +170,72 @@ class _SettingsPageState extends ConsumerState<SettingsPage> {
           // WebDAV 配置
           if (isConfigured) ...[
             Card(
-              child: Padding(
-                padding: const EdgeInsets.all(16),
-                child: Column(
-                  crossAxisAlignment: CrossAxisAlignment.start,
-                  children: [
-                    Text('WebDAV 远程备份', style: Theme.of(context).textTheme.titleMedium),
-                    const SizedBox(height: 12),
-                    TextField(
-                      controller: _webdavUrlCtrl,
-                      decoration: const InputDecoration(
-                        labelText: 'WebDAV 地址', hintText: 'https://nas.example.com/remote.php/dav/files/user/',
-                        border: OutlineInputBorder(), isDense: true,
+              child: _webdavConfigured && !_showWebdavForm
+                  ? ListTile(
+                      leading: const Icon(Icons.cloud_done, color: Colors.green),
+                      title: const Text('WebDAV 已配置'),
+                      subtitle: Text(_webdavUrlCtrl.text),
+                      trailing: TextButton(
+                        onPressed: () => setState(() => _showWebdavForm = true),
+                        child: const Text('修改'),
                       ),
-                    ),
-                    const SizedBox(height: 8),
-                    TextField(
-                      controller: _webdavUserCtrl,
-                      decoration: const InputDecoration(
-                        labelText: '用户名', border: OutlineInputBorder(), isDense: true,
+                    )
+                  : Padding(
+                      padding: const EdgeInsets.all(16),
+                      child: Column(
+                        crossAxisAlignment: CrossAxisAlignment.start,
+                        children: [
+                          Text('WebDAV 远程备份', style: Theme.of(context).textTheme.titleMedium),
+                          const SizedBox(height: 8),
+                          Text('备份 bank.db 到坚果云等 WebDAV 服务器',
+                              style: Theme.of(context).textTheme.bodySmall),
+                          const SizedBox(height: 12),
+                          TextField(
+                            controller: _webdavUrlCtrl,
+                            decoration: const InputDecoration(
+                              labelText: 'WebDAV 地址',
+                              hintText: 'https://dav.jianguoyun.com/dav/',
+                              border: OutlineInputBorder(), isDense: true,
+                            ),
+                          ),
+                          const SizedBox(height: 8),
+                          TextField(
+                            controller: _webdavUserCtrl,
+                            decoration: const InputDecoration(
+                              labelText: '用户名', border: OutlineInputBorder(), isDense: true,
+                            ),
+                          ),
+                          const SizedBox(height: 8),
+                          TextField(
+                            controller: _webdavPassCtrl,
+                            decoration: const InputDecoration(
+                              labelText: '密码', border: OutlineInputBorder(), isDense: true,
+                            ),
+                            obscureText: true,
+                          ),
+                          const SizedBox(height: 12),
+                          Row(
+                            children: [
+                              Expanded(
+                                child: FilledButton.tonal(
+                                  onPressed: _saveWebDAV,
+                                  child: const Text('保存'),
+                                ),
+                              ),
+                              if (_webdavConfigured) ...[
+                                const SizedBox(width: 8),
+                                Expanded(
+                                  child: OutlinedButton(
+                                    onPressed: () => setState(() => _showWebdavForm = false),
+                                    child: const Text('取消'),
+                                  ),
+                                ),
+                              ],
+                            ],
+                          ),
+                        ],
                       ),
                     ),
-                    const SizedBox(height: 8),
-                    TextField(
-                      controller: _webdavPassCtrl,
-                      decoration: const InputDecoration(
-                        labelText: '密码', border: OutlineInputBorder(), isDense: true,
-                      ),
-                      obscureText: true,
-                    ),
-                    const SizedBox(height: 12),
-                    SizedBox(width: double.infinity,
-                      child: FilledButton.tonal(onPressed: _saveWebDAV, child: const Text('保存 WebDAV 配置'))),
-                  ],
-                ),
-              ),
             ),
           ],