fix: arrow keys in prompts now move cursor, also implements delete key

cli/TerminalLayout.ts

@@ -44,7 +44,9 @@ export class TerminalLayout {
       clearTimeout(this.debounceTimer);
     }
     this.debounceTimer = setTimeout(
-      () => this.renderLayout(),
+      () => {
+        this.renderLayout();
+      },
       this.debounceDelay,
     );
   }
@@ -76,6 +78,10 @@ export class TerminalLayout {
       block.renderInternal(usedLines + 1);
       usedLines += lines.length;
     }
+    for (const name of this.layoutOrder) {
+      const block = this.blocks[name];
+      block.runPostRenderAction?.();
+    }
   }
 
   clearAll() {
@@ -217,7 +223,9 @@ export class TerminalBlock {
     const baseRow = startRow ?? this.lastRenderRow;
     const excessLines = this.renderHeight - this.renderLines.length;
     for (let i = 0; i < excessLines; i++) {
-      const moveToLine = `[${baseRow + this.renderLines.length + i};1H`;
+      const moveToLine = `\x1b[${
+        baseRow + this.renderLines.length + i
+      };1H\x1b[2K`;
       Deno.stdout.writeSync(new TextEncoder().encode(moveToLine));
     }
 
@@ -254,6 +262,17 @@ export class TerminalBlock {
     return this.fixedHeight ?? 0;
   }
 
+  private _postRenderAction?: () => void;
+  setPostRenderAction(action: (this: TerminalBlock) => void) {
+    this._postRenderAction = action;
+  }
+  runPostRenderAction() {
+    if (this._postRenderAction) {
+      this._postRenderAction.call(this);
+      this._postRenderAction = undefined;
+    }
+  }
+
   get lineCount() {
     return this.renderLines.length;
   }