feat: shift key in ssh term (#819)

lib/view/page/ssh/page/keyboard.dart

@@ -13,6 +13,13 @@ extension _Keyboard on SSHPageState {
         _handleEscKeyOrBackButton();
         return true; // Mark as handled so it doesn't propagate
       }
+      if (event.logicalKey == LogicalKeyboardKey.shiftLeft || 
+          event.logicalKey == LogicalKeyboardKey.shiftRight) {
+        // Handle shift key press
+        _terminal.keyInput(TerminalKey.shift);
+        HapticFeedback.lightImpact();
+        return true;
+      }
     }
     return false; // Let other handlers process this event
   }

lib/view/page/ssh/page/page.dart

@@ -291,6 +291,9 @@ class SSHPageState extends State<SSHPage>
       case TerminalKey.alt:
         selected = _keyboard.alt;
         break;
+      case TerminalKey.shift:
+        selected = _keyboard.shift;
+        break;
       default:
         break;
     }

lib/view/page/ssh/page/virt_key.dart

@@ -26,6 +26,9 @@ extension _VirtKey on SSHPageState {
       case TerminalKey.alt:
         _keyboard.alt = !_keyboard.alt;
         break;
+      case TerminalKey.shift:
+        _keyboard.shift = !_keyboard.shift;
+        break;
       default:
         _terminal.keyInput(key);
         break;