Fix markdown rename: drop blur-commit, handle IME, track active file

- Blur no longer commits, preventing accidental renames when focus moves
- IME composition keys properly handled for CJK input support
- File switches during rename now cancel the operation
- Extension display improved to show final filename
- Comprehensive test coverage added for edge cases

src/renderer/src/components/editor/EditorPanelHeaderPath.test.tsx

@@ -43,8 +43,8 @@ function baseFile(overrides: Partial<OpenFile> = {}): OpenFile {
   }
 }
 
-function renderPath(file: OpenFile): void {
-  render(
+function renderPath(file: OpenFile): (next: OpenFile) => void {
+  const view = render(
     <EditorPanelHeaderPath
       activeFile={file}
       copiedPathVisible={false}
@@ -54,6 +54,17 @@ function renderPath(file: OpenFile): void {
       onOpenContainingFolder={vi.fn()}
     />
   )
+  return (next) =>
+    view.rerender(
+      <EditorPanelHeaderPath
+        activeFile={next}
+        copiedPathVisible={false}
+        canShowMarkdownPreview={false}
+        onCopyPath={vi.fn()}
+        onOpenMarkdownPreview={vi.fn()}
+        onOpenContainingFolder={vi.fn()}
+      />
+    )
 }
 
 function getRenameInput(label: string): HTMLInputElement {
@@ -116,8 +127,8 @@ describe('EditorPanelHeaderPath breadcrumb morph rename', () => {
     if (!strip) {
       throw new Error('Missing rename strip')
     }
+    expect(strip.className).toContain('w-full')
     expect(strip.className).toContain('max-w-full')
-    expect(strip.className).not.toContain('520px')
   })
 
   it('selects the basename so typing replaces just the name', () => {
@@ -146,19 +157,91 @@ describe('EditorPanelHeaderPath breadcrumb morph rename', () => {
     })
   })
 
-  it('respects an explicitly typed extension without duplicating it', () => {
+  it('respects an explicitly typed extension and drops the pinned suffix', () => {
     renderPath(baseFile())
     openRenameInput()
 
     const input = getRenameInput('Rename file notes.md')
     fireEvent.change(input, { target: { value: 'renamed.mdx' } })
-    fireEvent.keyDown(input, { key: 'Enter' })
+    expect(screen.queryByText('.md')).toBeNull()
 
+    fireEvent.keyDown(input, { key: 'Enter' })
     expect(renameFileOnDiskMock).toHaveBeenCalledWith(
       expect.objectContaining({ newName: 'renamed.mdx' })
     )
   })
 
+  it('shows the same name it commits for a dotted basename', () => {
+    renderPath(baseFile())
+    openRenameInput()
+
+    const input = getRenameInput('Rename file notes.md')
+    fireEvent.change(input, { target: { value: 'v1.2' } })
+    expect(screen.queryByText('.md')).toBeNull()
+
+    fireEvent.keyDown(input, { key: 'Enter' })
+    expect(renameFileOnDiskMock).toHaveBeenCalledWith(expect.objectContaining({ newName: 'v1.2' }))
+  })
+
+  it('keeps the pinned suffix for a leading-dot name', () => {
+    renderPath(baseFile())
+    openRenameInput()
+
+    const input = getRenameInput('Rename file notes.md')
+    fireEvent.change(input, { target: { value: '.notes' } })
+    expect(screen.getByText('.md')).toBeDefined()
+
+    fireEvent.keyDown(input, { key: 'Enter' })
+    expect(renameFileOnDiskMock).toHaveBeenCalledWith(
+      expect.objectContaining({ newName: '.notes.md' })
+    )
+  })
+
+  it('ignores an Enter that only confirms an IME candidate', () => {
+    renderPath(baseFile())
+    openRenameInput()
+
+    const input = getRenameInput('Rename file notes.md')
+    fireEvent.change(input, { target: { value: 'renamed' } })
+    fireEvent.keyDown(input, { key: 'Enter', keyCode: 229 })
+    expect(renameFileOnDiskMock).not.toHaveBeenCalled()
+
+    fireEvent.keyDown(input, { key: 'Enter', keyCode: 13 })
+    expect(renameFileOnDiskMock).toHaveBeenCalledWith(
+      expect.objectContaining({ newName: 'renamed.md' })
+    )
+  })
+
+  it('does not commit when the field merely loses focus', () => {
+    renderPath(baseFile())
+    openRenameInput()
+
+    const input = getRenameInput('Rename file notes.md')
+    fireEvent.change(input, { target: { value: 'renamed' } })
+    fireEvent.blur(input)
+
+    expect(renameFileOnDiskMock).not.toHaveBeenCalled()
+    expect(screen.getByLabelText('Rename file notes.md')).toBeDefined()
+  })
+
+  it('drops rename mode when the active file changes', () => {
+    const rerenderPath = renderPath(baseFile())
+    openRenameInput()
+
+    fireEvent.change(getRenameInput('Rename file notes.md'), { target: { value: 'renamed' } })
+    rerenderPath(
+      baseFile({
+        id: '/repo/other.md',
+        filePath: '/repo/other.md',
+        relativePath: 'other.md'
+      })
+    )
+
+    expect(screen.queryByLabelText('Rename file notes.md')).toBeNull()
+    expect(screen.queryByLabelText('Rename file other.md')).toBeNull()
+    expect(renameFileOnDiskMock).not.toHaveBeenCalled()
+  })
+
   it('commits via the confirm button', () => {
     renderPath(baseFile())
     openRenameInput()

src/renderer/src/components/editor/EditorPanelHeaderPath.tsx

@@ -9,6 +9,7 @@ import {
   DropdownMenuTrigger
 } from '@/components/ui/dropdown-menu'
 import { useShortcutLabel } from '@/hooks/useShortcutLabel'
+import { isImeCompositionKeyDown } from '@/lib/ime-composition-keyboard-event'
 import { translate } from '@/i18n/i18n'
 import type { OpenFile } from '@/store/slices/editor'
 import { CLOSE_ALL_CONTEXT_MENUS_EVENT } from '../tab-bar/SortableTab'
@@ -63,11 +64,12 @@ export function EditorPanelHeaderPath({
     canRename,
     currentFileName,
     currentBaseName,
-    currentExtension,
+    pinnedExtension,
     breadcrumbSegments,
     isRenaming,
     renameInputRef,
     openRenameInput,
+    setRenameDraft,
     commitRename,
     cancelRename
   } = useEditorHeaderFileRename(activeFile)
@@ -111,7 +113,13 @@ export function EditorPanelHeaderPath({
               onMouseDown={(event) => event.stopPropagation()}
               onClick={(event) => event.stopPropagation()}
               onDoubleClick={(event) => event.stopPropagation()}
+              onChange={(event) => setRenameDraft(event.target.value)}
               onKeyDown={(event) => {
+                // Why: an Enter that only confirms a CJK IME candidate must not
+                // commit the rename; wait for a non-composition Enter.
+                if (isImeCompositionKeyDown(event)) {
+                  return
+                }
                 if (event.key === 'Enter') {
                   event.preventDefault()
                   event.stopPropagation()
@@ -122,11 +130,10 @@ export function EditorPanelHeaderPath({
                   cancelRename()
                 }
               }}
-              onBlur={commitRename}
             />
-            {currentExtension ? (
+            {pinnedExtension ? (
               <span className="shrink-0 font-mono text-xs text-muted-foreground">
-                {currentExtension}
+                {pinnedExtension}
               </span>
             ) : null}
             <div className="flex shrink-0 items-center">
@@ -142,8 +149,8 @@ export function EditorPanelHeaderPath({
                 )}
                 className="flex size-5 items-center justify-center rounded text-status-success hover:bg-status-success-background"
                 onMouseDown={(event) => {
-                  // Why: preventDefault keeps focus in the input so clicking
-                  // confirm does not blur-commit first and double-rename.
+                  // Why: preventDefault keeps the caret in the input so the
+                  // field is still usable if the click misses the button.
                   event.preventDefault()
                   event.stopPropagation()
                 }}
@@ -166,8 +173,8 @@ export function EditorPanelHeaderPath({
                 )}
                 className="flex size-5 items-center justify-center rounded text-muted-foreground hover:bg-accent hover:text-foreground"
                 onMouseDown={(event) => {
-                  // Why: same as confirm — cancel must win over the input's
-                  // blur-commit when the pointer leaves the field.
+                  // Why: same as confirm — the pointer leaving the field must
+                  // not disturb the input it is about to dismiss.
                   event.preventDefault()
                   event.stopPropagation()
                 }}

src/renderer/src/components/editor/editor-header-file-rename.ts

@@ -10,11 +10,12 @@ type EditorHeaderFileRenameState = {
   canRename: boolean
   currentFileName: string
   currentBaseName: string
-  currentExtension: string
+  pinnedExtension: string
   breadcrumbSegments: string[]
   isRenaming: boolean
   renameInputRef: RefCallback<HTMLInputElement>
   openRenameInput: () => void
+  setRenameDraft: (value: string) => void
   commitRename: () => void
   cancelRename: () => void
 }
@@ -36,9 +37,17 @@ function getBreadcrumbSegments(relativePath: string, worktreePath: string | null
   return segments
 }
 
+// A leading dot is part of a dotfile's name, not an extension — same split the
+// hook uses on the current file name.
+export function getTypedExtension(rawValue: string): string {
+  const dotIndex = rawValue.lastIndexOf('.')
+  return dotIndex > 0 ? rawValue.slice(dotIndex) : ''
+}
+
 // The morph input edits the basename while the extension stays pinned as a
-// suffix, so a bare name gets the extension re-attached. An explicitly typed
-// extension (same or different) is respected verbatim; null means no-op.
+// suffix, so a bare name gets the extension re-attached. A typed extension
+// (same or different) is respected verbatim and the pinned suffix is hidden so
+// the strip shows the name that will be committed; null means no-op.
 export function resolveRenameTarget(
   rawValue: string,
   currentFileName: string,
@@ -47,7 +56,7 @@ export function resolveRenameTarget(
   if (!rawValue || rawValue === currentFileName) {
     return null
   }
-  if (!currentExtension || rawValue.endsWith(currentExtension) || rawValue.includes('.')) {
+  if (!currentExtension || getTypedExtension(rawValue)) {
     return rawValue
   }
   return `${rawValue}${currentExtension}`
@@ -56,14 +65,23 @@ export function resolveRenameTarget(
 export function useEditorHeaderFileRename(activeFile: OpenFile): EditorHeaderFileRenameState {
   const worktree = useWorktreeById(activeFile.worktreeId)
   const [isRenaming, setIsRenaming] = useState(false)
+  const [renameDraft, setRenameDraft] = useState('')
+  const [renameFilePath, setRenameFilePath] = useState(activeFile.filePath)
   const renameInputElementRef = useRef<HTMLInputElement | null>(null)
-  const renameCancelledRef = useRef(false)
   const renameFocusFrameRef = useRef<number | null>(null)
+  // Why: the header renders one unkeyed path strip for every file, so a file
+  // switch mid-rename would otherwise commit the typed name against the new path.
+  if (renameFilePath !== activeFile.filePath) {
+    setRenameFilePath(activeFile.filePath)
+    setIsRenaming(false)
+    setRenameDraft('')
+  }
   const currentFileName = basename(activeFile.filePath)
   const lastDotIndex = currentFileName.lastIndexOf('.')
   const hasExtension = lastDotIndex > 0
   const currentBaseName = hasExtension ? currentFileName.slice(0, lastDotIndex) : currentFileName
   const currentExtension = hasExtension ? currentFileName.slice(lastDotIndex) : ''
+  const pinnedExtension = getTypedExtension(renameDraft.trim()) ? '' : currentExtension
   const breadcrumbSegments = getBreadcrumbSegments(activeFile.relativePath, worktree?.path ?? null)
   // Why: read-only tabs (AI Vault View Log) are never renameable — rename would
   // rewrite the agent-owned artifact's backing path.
@@ -78,24 +96,17 @@ export function useEditorHeaderFileRename(activeFile: OpenFile): EditorHeaderFil
     if (!canRename) {
       return
     }
-    renameCancelledRef.current = false
+    setRenameDraft(currentBaseName)
     setIsRenaming(true)
   }
 
   const commitRename = (): void => {
-    if (renameCancelledRef.current) {
-      setIsRenaming(false)
-      return
-    }
     const input = renameInputElementRef.current
     if (!input) {
       setIsRenaming(false)
       return
     }
     const rawVal = input.value.trim()
-    // onBlur follows Enter when the input unmounts; consume that trailing event
-    // so one user action cannot start a second rename against the old path.
-    renameCancelledRef.current = true
     setIsRenaming(false)
     const newName = resolveRenameTarget(rawVal, currentFileName, currentExtension)
     if (!newName) {
@@ -111,7 +122,6 @@ export function useEditorHeaderFileRename(activeFile: OpenFile): EditorHeaderFil
   }
 
   const cancelRename = (): void => {
-    renameCancelledRef.current = true
     setIsRenaming(false)
   }
 
@@ -151,11 +161,12 @@ export function useEditorHeaderFileRename(activeFile: OpenFile): EditorHeaderFil
     canRename,
     currentFileName,
     currentBaseName,
-    currentExtension,
+    pinnedExtension,
     breadcrumbSegments,
     isRenaming,
     renameInputRef,
     openRenameInput,
+    setRenameDraft,
     commitRename,
     cancelRename
   }

src/renderer/src/components/tab-bar/EditorFileTab.tsx

@@ -298,8 +298,8 @@ export default function EditorFileTab({
             )}
             defaultValue={basename(file.filePath)}
             // Why: keep the inline field compact enough for the titlebar while
-            // giving filenames more room to edit without premature truncation.
-            className="mr-1 h-5 w-[18ch] min-w-[96px] max-w-[200px] rounded-sm bg-input/40 px-1 py-0 text-xs text-foreground md:text-xs focus-visible:ring-[1px]"
+            // giving filenames a little more room than the static tab label.
+            className="mr-1 h-5 w-[12ch] min-w-[72px] max-w-[132px] rounded-sm bg-input/40 px-1 py-0 text-xs text-foreground md:text-xs focus-visible:ring-[1px]"
             spellCheck={false}
             onPointerDown={(e) => e.stopPropagation()}
             onMouseDown={(e) => e.stopPropagation()}

src/renderer/src/i18n/locales/en.json

@@ -14875,7 +14875,9 @@
           "631dab0df3": "Next change",
           "revealInFinder": "Reveal in Finder",
           "openContainingFolder": "Open Containing Folder",
-          "revealInFileExplorer": "Reveal in File Explorer"
+          "revealInFileExplorer": "Reveal in File Explorer",
+          "confirmRename": "Confirm rename",
+          "cancelRename": "Cancel rename"
         },
         "EditorPanelMarkdownActionsMenu": {
           "3e0ce48c24": "Export as PDF",

src/renderer/src/i18n/locales/es.json

@@ -12906,7 +12906,12 @@
           "f0fd4174b5": "Abre la pestaña de archivo para usar la edición enriquecida de Markdown",
           "a10d9b8337": "Abrir archivo",
           "2076ecfc9c": "Cambio anterior",
-          "631dab0df3": "Cambio siguiente"
+          "631dab0df3": "Cambio siguiente",
+          "revealInFinder": "Mostrar en Finder",
+          "openContainingFolder": "Abrir carpeta contenedora",
+          "revealInFileExplorer": "Mostrar en el Explorador",
+          "confirmRename": "Confirmar cambio de nombre",
+          "cancelRename": "Cancelar cambio de nombre"
         },
         "EditorPanelMarkdownActionsMenu": {
           "3e0ce48c24": "Exportar como PDF",

src/renderer/src/i18n/locales/fr.json

@@ -14124,7 +14124,12 @@
           "f0fd4174b5": "Ouvrez un onglet de fichier pour utiliser l'édition Markdown enrichie",
           "a10d9b8337": "Ouvrir le fichier",
           "2076ecfc9c": "Modification précédente",
-          "631dab0df3": "Modification suivante"
+          "631dab0df3": "Modification suivante",
+          "revealInFinder": "Afficher dans le Finder",
+          "openContainingFolder": "Ouvrir le dossier contenant",
+          "revealInFileExplorer": "Afficher dans l'Explorateur",
+          "confirmRename": "Confirmer le renommage",
+          "cancelRename": "Annuler le renommage"
         },
         "EditorPanelMarkdownActionsMenu": {
           "3e0ce48c24": "Exporter en PDF",

src/renderer/src/i18n/locales/ja.json

@@ -12906,7 +12906,12 @@
           "f0fd4174b5": "ファイルタブを開いてリッチ markdown 編集を使用する",
           "a10d9b8337": "ファイルを開く",
           "2076ecfc9c": "前の変更",
-          "631dab0df3": "次の変更"
+          "631dab0df3": "次の変更",
+          "revealInFinder": "Finderで表示",
+          "openContainingFolder": "含まれるフォルダを開く",
+          "revealInFileExplorer": "エクスプローラーで表示",
+          "confirmRename": "名前の変更を確定する",
+          "cancelRename": "名前の変更をキャンセルする"
         },
         "EditorPanelMarkdownActionsMenu": {
           "3e0ce48c24": "PDFとしてエクスポート",

src/renderer/src/i18n/locales/ko.json

@@ -12972,7 +12972,12 @@
           "f0fd4174b5": "풍부한 markdown 편집을 사용하려면 파일 탭을 엽니다.",
           "a10d9b8337": "파일 열기",
           "2076ecfc9c": "이전 변경",
-          "631dab0df3": "다음 변경"
+          "631dab0df3": "다음 변경",
+          "revealInFinder": "Finder에서 보기",
+          "openContainingFolder": "포함된 폴더 열기",
+          "revealInFileExplorer": "탐색기에서 보기",
+          "confirmRename": "이름 바꾸기 확인",
+          "cancelRename": "이름 바꾸기 취소"
         },
         "EditorPanelMarkdownActionsMenu": {
           "3e0ce48c24": "PDF로 내보내기",

src/renderer/src/i18n/locales/zh.json

@@ -12986,7 +12986,12 @@
           "f0fd4174b5": "打开文件选项卡以使用富文本 Markdown 编辑",
           "a10d9b8337": "打开文件",
           "2076ecfc9c": "上一个更改",
-          "631dab0df3": "下一个更改"
+          "631dab0df3": "下一个更改",
+          "revealInFinder": "在 Finder 中显示",
+          "openContainingFolder": "打开所在文件夹",
+          "revealInFileExplorer": "在资源管理器中显示",
+          "confirmRename": "确认重命名",
+          "cancelRename": "取消重命名"
         },
         "EditorPanelMarkdownActionsMenu": {
           "3e0ce48c24": "导出为 PDF",