Hide printer tab when settings disabled (#15901)

* fix: hide the printer settings tab when settings are disabled

The Security and Network tabs already honour `disable-settings`, but the
Printer tab was gated only on `hide-remote-printer-settings`, so custom
clients built with settings disabled still exposed it.

https://github.com/rustdesk/rustdesk-server-pro/issues/1001

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

* feat: add hide-general-settings builtin option

Hides the General tab of the settings page. Unlike the other
hide-*-settings options this one is still useful when settings are
disabled, since `disable-settings` does not cover the General tab.

https://github.com/rustdesk/rustdesk-server-pro/issues/1001

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

flutter/lib/consts.dart

@@ -191,6 +191,7 @@ const String kOptionHideProxySetting = "hide-proxy-settings";
 const String kOptionHideWebSocketSetting = "hide-websocket-settings";
 const String kOptionHideStopService = "hide-stop-service";
 const String kOptionHideRemotePrinterSetting = "hide-remote-printer-settings";
+const String kOptionHideGeneralSetting = "hide-general-settings";
 const String kOptionHideSecuritySetting = "hide-security-settings";
 const String kOptionHideNetworkSetting = "hide-network-settings";
 const String kOptionRemovePresetPasswordWarning =

flutter/lib/desktop/pages/desktop_setting_page.dart

@@ -61,7 +61,8 @@ enum SettingsTabKey {
 class DesktopSettingPage extends StatefulWidget {
   final SettingsTabKey initialTabkey;
   static final List<SettingsTabKey> tabKeys = [
-    SettingsTabKey.general,
+    if (bind.mainGetBuildinOption(key: kOptionHideGeneralSetting) != 'Y')
+      SettingsTabKey.general,
     if (!isWeb &&
         !bind.isOutgoingOnly() &&
         !bind.isDisableSettings() &&
@@ -73,6 +74,7 @@ class DesktopSettingPage extends StatefulWidget {
     if (!bind.isIncomingOnly()) SettingsTabKey.display,
     if (!bind.isDisableAccount()) SettingsTabKey.account,
     if (isWindows &&
+        !bind.isDisableSettings() &&
         bind.mainGetBuildinOption(key: kOptionHideRemotePrinterSetting) != 'Y')
       SettingsTabKey.printer,
     SettingsTabKey.about,