fix(cli): Handle VSCode Shift+Enter in text buffer

- The text buffer now correctly interprets `\\\r` (produced by Shift+Enter in the VSCode terminal) as a newline character.
- Added a corresponding test case to `text-buffer.test.ts`.

Fixes https://buganizer.corp.google.com/issues/418505364

1 files changed, 7 insertions, 1 deletions

diff --git a/packages/cli/src/ui/components/shared/text-buffer.ts b/packages/cli/src/ui/components/shared/text-buffer.ts
index a8b8cef3..789a909a 100644
--- a/packages/cli/src/ui/components/shared/text-buffer.ts
+++ b/packages/cli/src/ui/components/shared/text-buffer.ts
@@ -1151,7 +1151,13 @@ export function useTextBuffer({
 
       if (key['escape']) return false;
 
-      if (key['return'] || input === '\r' || input === '\n') newline();
+      if (
+        key['return'] ||
+        input === '\r' ||
+        input === '\n' ||
+        input === '\\\r' // VSCode terminal represents shift + enter this way
+      )
+        newline();
       else if (key['leftArrow'] && !key['meta'] && !key['ctrl'] && !key['alt'])
         move('left');
       else if (key['ctrl'] && input === 'b') move('left');