fix(tui): detect escape key variants for prompt cancellation

src/frontends/tui/minimal.ts

@@ -80,6 +80,10 @@ export class MinimalTui {
 
   constructor(private config: MinimalTuiConfig) {}
 
+  private isEscapeKey(char: string, key: readline.Key): boolean {
+    return key?.name === 'escape' || key?.sequence === '\x1b' || char === '\x1b';
+  }
+
   private showHint(line: string): void {
     if (!line.startsWith('/')) {
       this.clearHint();
@@ -158,8 +162,8 @@ export class MinimalTui {
     }
 
     // Listen for line changes to show hints
-    this.keypressHandler = (_char: string, key: readline.Key) => {
-      if (key?.name === 'escape' && this.activePromptCancel) {
+    this.keypressHandler = (char: string, key: readline.Key) => {
+      if (this.activePromptCancel && this.isEscapeKey(char, key)) {
         this.activePromptCancel();
         return;
       }