Fix strictFunctionTypes errors in terminalService

Part of #81574

src/vs/workbench/contrib/terminal/browser/terminalInstance.ts

@@ -258,7 +258,7 @@ export class TerminalInstance extends Disposable implements ITerminalInstance {
 	public constructor(
 		private readonly _terminalFocusContextKey: IContextKey<boolean>,
 		private readonly _configHelper: TerminalConfigHelper,
-		private _container: HTMLElement,
+		private _container: HTMLElement | undefined,
 		private _shellLaunchConfig: IShellLaunchConfig,
 		@ITerminalInstanceService private readonly _terminalInstanceService: ITerminalInstanceService,
 		@IContextKeyService private readonly _contextKeyService: IContextKeyService,
@@ -548,7 +548,9 @@ export class TerminalInstance extends Disposable implements ITerminalInstance {
 		}
 
 		// The container changed, reattach
-		this._container.removeChild(this._wrapperElement);
+		if (this._container) {
+			this._container.removeChild(this._wrapperElement);
+		}
 		this._container = container;
 		this._container.appendChild(this._wrapperElement);
 	}
@@ -801,7 +803,7 @@ export class TerminalInstance extends Disposable implements ITerminalInstance {
 			if (this._wrapperElement.xterm) {
 				this._wrapperElement.xterm = undefined;
 			}
-			if (this._wrapperElement.parentElement) {
+			if (this._wrapperElement.parentElement && this._container) {
 				this._container.removeChild(this._wrapperElement);
 			}
 		}

src/vs/workbench/contrib/terminal/browser/terminalService.ts

@@ -17,7 +17,7 @@ import { IInstantiationService } from 'vs/platform/instantiation/common/instanti
 import { IExtensionService } from 'vs/workbench/services/extensions/common/extensions';
 import { IFileService } from 'vs/platform/files/common/files';
 import { TerminalInstance } from 'vs/workbench/contrib/terminal/browser/terminalInstance';
-import { IBrowserTerminalConfigHelper, ITerminalService, ITerminalInstance, ITerminalTab } from 'vs/workbench/contrib/terminal/browser/terminal';
+import { ITerminalService, ITerminalInstance, ITerminalTab } from 'vs/workbench/contrib/terminal/browser/terminal';
 import { IRemoteAgentService } from 'vs/workbench/services/remote/common/remoteAgentService';
 import { TerminalConfigHelper } from 'vs/workbench/contrib/terminal/browser/terminalConfigHelper';
 import { IQuickInputService, IQuickPickItem, IPickOptions } from 'vs/platform/quickinput/common/quickInput';
@@ -54,7 +54,7 @@ export class TerminalService implements ITerminalService {
 	public get terminalInstances(): ITerminalInstance[] { return this._terminalInstances; }
 	public get terminalTabs(): ITerminalTab[] { return this._terminalTabs; }
 
-	private _configHelper: IBrowserTerminalConfigHelper;
+	private _configHelper: TerminalConfigHelper;
 	private _terminalContainer: HTMLElement | undefined;
 
 	public get configHelper(): ITerminalConfigHelper { return this._configHelper; }