terminal works basically. (#12189)

* terminal works basically.
todo:
- persistent
- sessions restore
- web
- mobile

* missed terminal persistent option change

* android sdk 34 -> 35

* +#![cfg_attr(lt_1_77, feature(c_str_literals))]

* fixing ci

* fix ci

* fix ci for android

* try "Fix Android SDK Platform 35"

* fix android 34

* revert flutter_plugin_android_lifecycle to 2.0.17 which used in rustdesk 1.4.0

* refactor, but break something of desktop terminal (new tab showing loading)

* fix connecting...

flutter/lib/utils/multi_window_manager.dart

@@ -17,6 +17,7 @@ enum WindowType {
   FileTransfer,
   ViewCamera,
   PortForward,
+  Terminal,
   Unknown
 }
 
@@ -33,6 +34,8 @@ extension Index on int {
         return WindowType.ViewCamera;
       case 4:
         return WindowType.PortForward;
+      case 5:
+        return WindowType.Terminal;
       default:
         return WindowType.Unknown;
     }
@@ -61,6 +64,7 @@ class RustDeskMultiWindowManager {
   final List<int> _fileTransferWindows = List.empty(growable: true);
   final List<int> _viewCameraWindows = List.empty(growable: true);
   final List<int> _portForwardWindows = List.empty(growable: true);
+  final List<int> _terminalWindows = List.empty(growable: true);
 
   moveTabToNewWindow(int windowId, String peerId, String sessionId,
       WindowType windowType) async {
@@ -343,6 +347,32 @@ class RustDeskMultiWindowManager {
     );
   }
 
+  Future<MultiWindowCallResult> newTerminal(
+    String remoteId, {
+    String? password,
+    bool? isSharedPassword,
+    bool? forceRelay,
+    String? connToken,
+  }) async {
+    // Terminal windows should always create new windows, not reuse
+    // This avoids the MissingPluginException when trying to invoke
+    // new_terminal on an inactive window
+    var params = {
+      "type": WindowType.Terminal.index,
+      "id": remoteId,
+      "password": password,
+      "forceRelay": forceRelay,
+      "isSharedPassword": isSharedPassword,
+      "connToken": connToken,
+    };
+    final msg = jsonEncode(params);
+    
+    // Always create a new window for terminal
+    final windowId = await newSessionWindow(
+        WindowType.Terminal, remoteId, msg, _terminalWindows, false);
+    return MultiWindowCallResult(windowId, null);
+  }
+
   Future<MultiWindowCallResult> call(
       WindowType type, String methodName, dynamic args) async {
     final wnds = _findWindowsByType(type);
@@ -373,6 +403,8 @@ class RustDeskMultiWindowManager {
         return _viewCameraWindows;
       case WindowType.PortForward:
         return _portForwardWindows;
+      case WindowType.Terminal:
+        return _terminalWindows;
       case WindowType.Unknown:
         break;
     }
@@ -395,6 +427,8 @@ class RustDeskMultiWindowManager {
       case WindowType.PortForward:
         _portForwardWindows.clear();
         break;
+      case WindowType.Terminal:
+        _terminalWindows.clear();
       case WindowType.Unknown:
         break;
     }