fix(ui): guard the remaining comment inputs against IME composition

The IME fix covered the diff/file comment input and the browser annotation
overlay, but two other places where a user writes a comment still acted on
the Enter that confirms an IME candidate: the chat quote comment in the text
selection menu, and the in-place comment editor on a composer context chip.
Confirming a candidate there attached or committed the half-typed reading and
closed the input. Escape, which abandons a candidate, had the same problem.

Both handlers now return early on a composing keystroke, and a single test
asserts the guard across every comment input so the next one added does not
quietly skip it.

packages/ui/src/components/chat/composer/ui/ComposerContextChips.tsx

@@ -14,6 +14,7 @@ import React from 'react';
 import { Icon } from '@/components/icon/Icon';
 import type { IconName } from '@/components/icon/icons';
 import { useI18n } from '@/lib/i18n';
+import { isIMECompositionEvent } from '@/lib/ime';
 import { getRuntimeKey } from '@/lib/runtime-switch';
 import {
     EMPTY_INLINE_COMMENT_DRAFTS,
@@ -165,6 +166,10 @@ const DraftPreviewEntry: React.FC<{
                                 onChange={(event) => setEditText(event.target.value)}
                                 onBlur={commitEdit}
                                 onKeyDown={(event) => {
+                                    // An IME candidate is confirmed with Enter and
+                                    // abandoned with Escape; neither keystroke should
+                                    // commit or revert the edit.
+                                    if (isIMECompositionEvent(event)) return;
                                     if (event.key === 'Enter' && !event.shiftKey) {
                                         event.preventDefault();
                                         commitEdit();

packages/ui/src/components/chat/message/TextSelectionMenu.tsx

@@ -16,6 +16,7 @@ import { resolveProjectForSessionDirectory } from '@/lib/projectResolution';
 import { useEffectiveDirectory } from '@/hooks/useEffectiveDirectory';
 import { isVSCodeRuntime } from '@/lib/desktop';
 import { useI18n } from '@/lib/i18n';
+import { isIMECompositionEvent } from '@/lib/ime';
 import { rangeToMarkdown, trimSelectionValue, wrapMarkdownSelectionForChat } from './selectionMarkdown';
 import { focusChatInput } from '@/components/chat/composer/editor/dom';
 import { registerActiveSelectionToolbar } from '@/lib/addSelectionToChat';
@@ -590,6 +591,9 @@ export const TextSelectionMenu: React.FC<TextSelectionMenuProps> = ({ containerR
           resizeCommentInput();
         }}
         onKeyDown={(event) => {
+          // An IME candidate is confirmed with Enter and abandoned with
+          // Escape; neither keystroke belongs to the comment yet.
+          if (isIMECompositionEvent(event)) return;
           // Desktop: Enter attaches, Shift+Enter breaks the line. Mobile
           // keyboards use Enter for line breaks; attaching is the button's job.
           if (event.key === 'Enter' && !event.shiftKey && !isMobile) {