feat: show vault-relative path below title in editor

Notes in subdirectories now display their vault-relative path
(e.g. docs/adr/0001-tauri-stack.md) as small muted text below
the title field. Root-level notes show no path. Note list entries
do not display any path.

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

src/components/TitleField.test.tsx

@@ -101,4 +101,19 @@ describe('TitleField', () => {
     window.dispatchEvent(new CustomEvent('laputa:focus-editor', { detail: { selectTitle: true } }))
     expect(document.activeElement).toBe(input)
   })
+
+  it('shows vault-relative path for notes in subdirectories', () => {
+    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')
+  })
+
+  it('hides path for notes at vault root', () => {
+    render(<TitleField title="Root Note" filename="root-note.md" notePath="/Users/luca/Laputa/root-note.md" vaultPath="/Users/luca/Laputa" onTitleChange={() => {}} />)
+    expect(screen.queryByTestId('title-field-path')).not.toBeInTheDocument()
+  })
+
+  it('hides path when vaultPath is not provided', () => {
+    render(<TitleField title="Note" filename="note.md" onTitleChange={() => {}} />)
+    expect(screen.queryByTestId('title-field-path')).not.toBeInTheDocument()
+  })
 })

src/components/TitleField.tsx

@@ -5,6 +5,10 @@ interface TitleFieldProps {
   title: string
   filename: string
   editable?: boolean
+  /** Absolute path of the note file. */
+  notePath?: string
+  /** Absolute path of the vault root. */
+  vaultPath?: string
   /** Called when the user finishes editing the title (blur or Enter). */
   onTitleChange: (newTitle: string) => void
 }
@@ -48,7 +52,7 @@ function useOptimisticTitle(title: string, onTitleChange: (t: string) => void) {
  * Dedicated title input field above the editor.
  * Displays the title as an editable field and shows the resulting filename below.
  */
-export function TitleField({ title, filename, editable = true, onTitleChange }: TitleFieldProps) {
+export function TitleField({ title, filename, editable = true, notePath, vaultPath, onTitleChange }: TitleFieldProps) {
   const inputRef = useRef<HTMLInputElement>(null)
   const { value, isEditing, handleFocus, commitTitle, revert, setEdit } =
     useOptimisticTitle(title, onTitleChange)
@@ -80,6 +84,12 @@ export function TitleField({ title, filename, editable = true, onTitleChange }:
   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 + '/', '')
+    : null
+  const showRelativePath = relativePath && relativePath.includes('/')
+
   return (
     <div className="title-field" data-testid="title-field">
       <input
@@ -100,6 +110,11 @@ export function TitleField({ title, filename, editable = true, onTitleChange }:
           {expectedSlug}.md
         </span>
       )}
+      {showRelativePath && (
+        <span className="title-field__path" data-testid="title-field-path" style={{ display: 'block', fontSize: 11, color: 'var(--muted-foreground)', marginTop: 2 }}>
+          {relativePath}
+        </span>
+      )}
     </div>
   )
 }