fix: note path below title — show only on focus, remove duplicate filename

Two bugs fixed in TitleField:

1. Vault-relative path was always visible for subdirectory notes. Now
   only appears when the title input is focused, hidden on blur.

2. Both bare filename and vault-relative path rendered simultaneously.
   Now the filename hint is suppressed when the path is visible, so
   only one line shows (e.g. `docs/adr/0001-tauri-stack`). Also
   strips the .md extension from the displayed path.

Root-level notes continue to show no path (unchanged).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/components/TitleField.test.tsx

@@ -117,18 +117,35 @@ describe('TitleField', () => {
     expect(input).toHaveValue('Untitled note')
   })
 
-  it('shows vault-relative path for notes in subdirectories', () => {
+  it('shows vault-relative path (without .md) only when title is focused', () => {
     render(<TitleField title="ADR" filename="0001-tauri-stack.md" notePath="/Users/luca/Laputa/docs/adr/0001-tauri-stack.md" vaultPath="/Users/luca/Laputa" onTitleChange={() => {}} />)
-    expect(screen.getByTestId('title-field-path')).toHaveTextContent('docs/adr/0001-tauri-stack.md')
+    // Path hidden by default
+    expect(screen.queryByTestId('title-field-path')).not.toBeInTheDocument()
+    // Focus title → path appears
+    fireEvent.focus(screen.getByTestId('title-field-input'))
+    expect(screen.getByTestId('title-field-path')).toHaveTextContent('docs/adr/0001-tauri-stack')
+    // No bare filename shown when path is visible
+    expect(screen.queryByTestId('title-field-filename')).not.toBeInTheDocument()
   })
 
-  it('hides path for notes at vault root', () => {
+  it('hides path on blur', () => {
+    render(<TitleField title="ADR" filename="0001-tauri-stack.md" notePath="/Users/luca/Laputa/docs/adr/0001-tauri-stack.md" vaultPath="/Users/luca/Laputa" onTitleChange={() => {}} />)
+    const input = screen.getByTestId('title-field-input')
+    fireEvent.focus(input)
+    expect(screen.getByTestId('title-field-path')).toBeInTheDocument()
+    fireEvent.blur(input)
+    expect(screen.queryByTestId('title-field-path')).not.toBeInTheDocument()
+  })
+
+  it('hides path for notes at vault root even when focused', () => {
     render(<TitleField title="Root Note" filename="root-note.md" notePath="/Users/luca/Laputa/root-note.md" vaultPath="/Users/luca/Laputa" onTitleChange={() => {}} />)
+    fireEvent.focus(screen.getByTestId('title-field-input'))
     expect(screen.queryByTestId('title-field-path')).not.toBeInTheDocument()
   })
 
   it('hides path when vaultPath is not provided', () => {
     render(<TitleField title="Note" filename="note.md" onTitleChange={() => {}} />)
+    fireEvent.focus(screen.getByTestId('title-field-input'))
     expect(screen.queryByTestId('title-field-path')).not.toBeInTheDocument()
   })
 })

src/components/TitleField.tsx

@@ -63,6 +63,7 @@ function useOptimisticTitle(title: string, onTitleChange: (t: string) => void) {
  */
 export function TitleField({ title, filename, editable = true, notePath, vaultPath, onTitleChange }: TitleFieldProps) {
   const inputRef = useRef<HTMLInputElement>(null)
+  const [isFocused, setIsFocused] = useState(false)
   const { value, isEditing, handleFocus, commitTitle, revert, setEdit } =
     useOptimisticTitle(title, onTitleChange)
 
@@ -91,13 +92,17 @@ export function TitleField({ title, filename, editable = true, notePath, vaultPa
 
   const expectedSlug = slugify(value.trim() || title)
   const currentStem = filename.replace(/\.md$/, '')
-  const showFilename = isEditing || currentStem !== expectedSlug
 
   // Compute vault-relative path (only for notes in subdirectories)
   const relativePath = notePath && vaultPath
-    ? notePath.replace(vaultPath + '/', '')
+    ? notePath.replace(vaultPath + '/', '').replace(/\.md$/, '')
     : null
-  const showRelativePath = relativePath && relativePath.includes('/')
+  const isSubdirectory = relativePath != null && relativePath.includes('/')
+
+  // Show path only when title is focused and note is in a subdirectory
+  const showRelativePath = isFocused && isSubdirectory
+  // Show filename hint when slug differs, but suppress when path is already visible
+  const showFilename = !showRelativePath && (isEditing || currentStem !== expectedSlug)
 
   return (
     <div className="title-field" data-testid="title-field">
@@ -106,8 +111,8 @@ export function TitleField({ title, filename, editable = true, notePath, vaultPa
         className="title-field__input"
         value={value}
         onChange={e => setEdit(e.target.value)}
-        onFocus={handleFocus}
-        onBlur={commitTitle}
+        onFocus={() => { setIsFocused(true); handleFocus() }}
+        onBlur={() => { setIsFocused(false); commitTitle() }}
         onKeyDown={handleKeyDown}
         disabled={!editable}
         placeholder="Untitled"