password max length prompt (#9248)

Signed-off-by: 21pages <sunboeasy@gmail.com>

flutter/lib/desktop/pages/desktop_home_page.dart

@@ -857,6 +857,7 @@ void setPasswordDialog({VoidCallback? notEmptyCallback}) async {
     // SpecialCharacterValidationRule(),
     MinCharactersValidationRule(8),
   ];
+  final maxLength = bind.mainMaxEncryptLen();
 
   gFFI.dialogManager.show((setState, close, context) {
     submit() {
@@ -915,6 +916,7 @@ void setPasswordDialog({VoidCallback? notEmptyCallback}) async {
                         errMsg0 = '';
                       });
                     },
+                    maxLength: maxLength,
                   ),
                 ),
               ],
@@ -941,6 +943,7 @@ void setPasswordDialog({VoidCallback? notEmptyCallback}) async {
                         errMsg1 = '';
                       });
                     },
+                    maxLength: maxLength,
                   ),
                 ),
               ],

flutter/lib/desktop/pages/desktop_setting_page.dart

@@ -2512,6 +2512,7 @@ void changeSocks5Proxy() async {
                                     : Icons.visibility))),
                         controller: pwdController,
                         enabled: !isOptFixed,
+                        maxLength: bind.mainMaxEncryptLen(),
                       )),
                 ),
               ],