fix(tui): kill prompt text while the transcript is focused

Author: TheGreatAxios

src/tui/prompt-kill-ring.test.ts

@@ -1,6 +1,7 @@
 import { describe, expect, test } from "bun:test";
 import { defined } from "../../testkit/defined.js";
 import { withTestRenderer } from "./harness";
+import { shellFocusTranscript } from "./shell/chrome";
 import { createAppShell } from "./shell/index";
 import {
   beginYank,
@@ -322,4 +323,21 @@ describe("prompt kill ring chords", () => {
       expect(shell.prompt.value).toBe("ab你cd");
     });
   });
+
+  test("ctrl+k still kills prompt text while the transcript is focused", async () => {
+    await withTestRenderer(async (h) => {
+      const shell = createAppShell(h.renderer, {
+        terminal: { columns: 80, rows: 24 },
+        run: "idle",
+      });
+      shell.prompt.value = "hello";
+      shell.prompt.cursorOffset = 0;
+      shellFocusTranscript(shell);
+      expect(shell.prompt.focused).toBe(false);
+      h.pressKey("k", { ctrl: true });
+      expect(shell.prompt.value).toBe("");
+      h.pressKey("y", { ctrl: true });
+      expect(shell.prompt.value).toBe("hello");
+    });
+  });
 });

src/tui/shell/keys.ts

@@ -558,6 +558,33 @@ export function createShellKeyHandlers(
       shell.promptKillRing = breakKillSequence(shell.promptKillRing);
     }
 
+    // Textarea defaults only run while the prompt is focused. After Tab the
+    // transcript holds focus, so call the same delete methods the default
+    // bindings use. capturePromptKills records the diff. Do not keymap-bind
+    // these: that would steal them from the focused textarea.
+    if (!shell.prompt.focused) {
+      if (key.ctrl && !key.meta && !key.option && keyName === "k") {
+        key.preventDefault();
+        shell.prompt.deleteToLineEnd();
+        return;
+      }
+      if (key.ctrl && !key.meta && !key.option && keyName === "u") {
+        key.preventDefault();
+        shell.prompt.deleteToLineStart();
+        return;
+      }
+      if (key.ctrl && !key.meta && !key.option && keyName === "w") {
+        key.preventDefault();
+        shell.prompt.deleteWordBackward();
+        return;
+      }
+      if ((key.meta || key.option) && !key.ctrl && keyName === "d") {
+        key.preventDefault();
+        shell.prompt.deleteWordForward();
+        return;
+      }
+    }
+
     if (key.ctrl && !key.meta && !key.option && keyName === "y") {
       key.preventDefault();
       const yank = beginYank(shell.promptKillRing, shell.prompt.cursorOffset);