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/models/model.dart

@@ -23,6 +23,7 @@ import 'package:flutter_hbb/models/server_model.dart';
 import 'package:flutter_hbb/models/user_model.dart';
 import 'package:flutter_hbb/models/state_model.dart';
 import 'package:flutter_hbb/models/desktop_render_texture.dart';
+import 'package:flutter_hbb/models/terminal_model.dart';
 import 'package:flutter_hbb/plugin/event.dart';
 import 'package:flutter_hbb/plugin/manager.dart';
 import 'package:flutter_hbb/plugin/widgets/desc_ui.dart';
@@ -311,6 +312,8 @@ class FfiModel with ChangeNotifier {
       } else if (name == 'chat_server_mode') {
         parent.target?.chatModel
             .receive(int.parse(evt['id'] as String), evt['text'] ?? '');
+      } else if (name == 'terminal_response') {
+        parent.target?.routeTerminalResponse(evt);
       } else if (name == 'file_dir') {
         parent.target?.fileModel.receiveFileDir(evt);
       } else if (name == 'empty_dirs') {
@@ -1076,9 +1079,14 @@ class FfiModel with ChangeNotifier {
               sessionId: sessionId, arg: kOptionTouchMode) !=
           '';
     }
-    // FIXME: handle ViewCamera ConnType independently.
     if (connType == ConnType.fileTransfer) {
       parent.target?.fileModel.onReady();
+    } else if (connType == ConnType.terminal) {
+      // Call onReady on all registered terminal models
+      final models = parent.target?._terminalModels.values ?? [];
+      for (final model in models) {
+        model.onReady();
+      }
     } else if (connType == ConnType.defaultConn ||
         connType == ConnType.viewCamera) {
       List<Display> newDisplays = [];
@@ -2828,7 +2836,14 @@ class ElevationModel with ChangeNotifier {
 }
 
 // The index values of `ConnType` are same as rust protobuf.
-enum ConnType { defaultConn, fileTransfer, portForward, rdp, viewCamera }
+enum ConnType {
+  defaultConn,
+  fileTransfer,
+  portForward,
+  rdp,
+  viewCamera,
+  terminal
+}
 
 /// Flutter state manager and data communication with the Rust core.
 class FFI {
@@ -2863,6 +2878,12 @@ class FFI {
   late final Peers favoritePeersModel; // global
   late final Peers lanPeersModel; // global
 
+  // Terminal model registry for multiple terminals
+  final Map<int, TerminalModel> _terminalModels = {};
+
+  // Getter for terminal models
+  Map<int, TerminalModel> get terminalModels => _terminalModels;
+
   FFI(SessionID? sId) {
     sessionId = sId ?? (isDesktop ? Uuid().v4obj() : _constSessionId);
     imageModel = ImageModel(WeakReference(this));
@@ -2910,6 +2931,7 @@ class FFI {
     bool isViewCamera = false,
     bool isPortForward = false,
     bool isRdp = false,
+    bool isTerminal = false,
     String? switchUuid,
     String? password,
     bool? isSharedPassword,
@@ -2925,7 +2947,10 @@ class FFI {
     assert(
         (!(isPortForward && isViewCamera)) &&
             (!(isViewCamera && isPortForward)) &&
-            (!(isPortForward && isFileTransfer)),
+            (!(isPortForward && isFileTransfer)) &&
+            (!(isTerminal && isFileTransfer)) &&
+            (!(isTerminal && isViewCamera)) &&
+            (!(isTerminal && isPortForward)),
         'more than one connect type');
     if (isFileTransfer) {
       connType = ConnType.fileTransfer;
@@ -2933,6 +2958,8 @@ class FFI {
       connType = ConnType.viewCamera;
     } else if (isPortForward) {
       connType = ConnType.portForward;
+    } else if (isTerminal) {
+      connType = ConnType.terminal;
     } else {
       chatModel.resetClientMode();
       connType = ConnType.defaultConn;
@@ -2953,6 +2980,7 @@ class FFI {
         isViewCamera: isViewCamera,
         isPortForward: isPortForward,
         isRdp: isRdp,
+        isTerminal: isTerminal,
         switchUuid: switchUuid ?? '',
         forceRelay: forceRelay ?? false,
         password: password ?? '',
@@ -3132,6 +3160,11 @@ class FFI {
   Future<void> close({bool closeSession = true}) async {
     closed = true;
     chatModel.close();
+    // Close all terminal models
+    for (final model in _terminalModels.values) {
+      model.dispose();
+    }
+    _terminalModels.clear();
     if (imageModel.image != null && !isWebDesktop) {
       await setCanvasConfig(
           sessionId,
@@ -3162,6 +3195,27 @@ class FFI {
   Future<bool> invokeMethod(String method, [dynamic arguments]) async {
     return await platformFFI.invokeMethod(method, arguments);
   }
+
+  // Terminal model management
+  void registerTerminalModel(int terminalId, TerminalModel model) {
+    debugPrint('[FFI] Registering terminal model for terminal $terminalId');
+    _terminalModels[terminalId] = model;
+  }
+
+  void unregisterTerminalModel(int terminalId) {
+    debugPrint('[FFI] Unregistering terminal model for terminal $terminalId');
+    _terminalModels.remove(terminalId);
+  }
+
+  void routeTerminalResponse(Map<String, dynamic> evt) {
+    final int terminalId = evt['terminal_id'] ?? 0;
+
+    // Route to specific terminal model if it exists
+    final model = _terminalModels[terminalId];
+    if (model != null) {
+      model.handleTerminalResponse(evt);
+    }
+  }
 }
 
 const kInvalidResolutionValue = -1;
@@ -3266,9 +3320,6 @@ class PeerInfo with ChangeNotifier {
   bool get isAmyuniIdd =>
       platformAdditions[kPlatformAdditionsIddImpl] == 'amyuni_idd';
 
-  bool get isSupportViewCamera =>
-      platformAdditions[kPlatformAdditionsSupportViewCamera] == true;
-
   Display? tryGetDisplay({int? display}) {
     if (displays.isEmpty) {
       return null;