bumped xterm, check bracketedPaste state via terminal modes

tabby-terminal/src/api/baseTerminalTab.component.ts

@@ -127,7 +127,6 @@ export class BaseTerminalTabComponent extends BaseTabComponent implements OnInit
     private termContainerSubscriptions = new SubscriptionContainer()
     private allFocusModeSubscription: Subscription|null = null
     private sessionHandlers = new SubscriptionContainer()
-    private sessionSupportsBracketedPaste = false
     private spinner = new Spinner({
         stream: {
             write: x => {
@@ -418,19 +417,12 @@ export class BaseTerminalTabComponent extends BaseTabComponent implements OnInit
             }
         }
 
-        if (data.includes('\x1b[?2004h')) {
-            this.sessionSupportsBracketedPaste = true
-        }
-        if (data.includes('\x1b[?2004l')) {
-            this.sessionSupportsBracketedPaste = false
-        }
-
         this.frontend.write(data)
     }
 
     async paste (): Promise<void> {
         let data = this.platform.readClipboard()
-        if (this.config.store.terminal.bracketedPaste && this.sessionSupportsBracketedPaste) {
+        if (this.config.store.terminal.bracketedPaste && this.frontend?.supportsBracketedPaste()) {
             data = `\x1b[200~${data}\x1b[201~`
         }
         if (this.hostApp.platform === Platform.Windows) {

tabby-terminal/src/config.ts

@@ -12,7 +12,7 @@ export class TerminalConfigProvider extends ConfigProvider {
             fallbackFont: null,
             linePadding: 0,
             bell: 'off',
-            bracketedPaste: false,
+            bracketedPaste: true,
             background: 'theme',
             ligatures: false,
             cursor: 'block',

tabby-terminal/src/frontends/frontend.ts

@@ -76,4 +76,6 @@ export abstract class Frontend {
 
     abstract saveState (): any
     abstract restoreState (state: string): void
+
+    abstract supportsBracketedPaste (): boolean
 }

tabby-terminal/src/frontends/xtermFrontend.ts

@@ -324,6 +324,10 @@ export class XTermFrontend extends Frontend {
         this.xterm.write(state)
     }
 
+    supportsBracketedPaste (): boolean {
+        return this.xterm.modes.bracketedPasteMode
+    }
+
     private setFontSize () {
         const scale = Math.pow(1.1, this.zoom)
         this.xterm.setOption('fontSize', this.configuredFontSize * scale)