improvements

src/main/notes-service.ts

@@ -0,0 +1,28 @@
+/**
+ * Project scratch note: a plain text file at `<project>/.notes.txt`.
+ *
+ * Deliberately not JSON and not part of `.helder/`. It is a note the user
+ * writes by hand, so it must stay readable and editable outside Helder.
+ */
+import { readFile, writeFile } from 'node:fs/promises'
+import { join } from 'node:path'
+import { logger } from './logger'
+
+export const NOTES_FILE = '.notes.txt'
+
+/** The note's text. Empty string when the project has no note yet. */
+export async function readNote(root: string): Promise<string> {
+  try {
+    return await readFile(join(root, NOTES_FILE), 'utf8')
+  } catch (err) {
+    // ENOENT is the normal "no note yet" case, anything else is worth knowing.
+    if ((err as NodeJS.ErrnoException).code !== 'ENOENT') {
+      logger.warn('notes', 'read failed', { root, err: String(err) })
+    }
+    return ''
+  }
+}
+
+export async function writeNote(root: string, text: string): Promise<void> {
+  await writeFile(join(root, NOTES_FILE), text, 'utf8')
+}

src/renderer/src/App.tsx

@@ -247,6 +247,24 @@ export function App(): React.ReactElement {
   const gitSelPath = gitSelRow?.path ?? null
   const treeSelItem = treeNav[treeSel] ?? null
 
+  // Clicking a row moves the keyboard cursor onto it. Without this the cursor
+  // stays at index 0, so the top row of the list keeps its highlight next to
+  // whichever row the click actually selected.
+  const syncGitSel = (target: EventTarget): void => {
+    const row = (target as HTMLElement).closest?.('.git-row') as HTMLElement | null
+    const id = row?.dataset.rowId
+    if (!id) return
+    const i = gitNav.findIndex((r) => r.id === id)
+    if (i >= 0) setGitSel(i)
+  }
+  const syncTreeSel = (target: EventTarget): void => {
+    const row = (target as HTMLElement).closest?.('.tree-row') as HTMLElement | null
+    const path = row?.dataset.rowPath
+    if (path == null) return
+    const i = treeNav.findIndex((r) => r.path === path)
+    if (i >= 0) setTreeSel(i)
+  }
+
   // Keep the row cursors in range as the lists shrink/grow.
   useEffect(() => { setGitSel((s) => Math.min(s, Math.max(0, gitNav.length - 1))) }, [gitNav.length])
   useEffect(() => { setTreeSel((s) => Math.min(s, Math.max(0, treeNav.length - 1))) }, [treeNav.length])
@@ -708,7 +726,7 @@ export function App(): React.ReactElement {
     }
     return false
   }
-  // ⌘→ with the note open hands the whole note to the agent. Same route as the
+  // ⌘P with the note open hands the whole note to the agent. Same route as the
   // editor's Pass on to Agent: bracketed paste, so nothing is submitted. The note
   // is saved and closed, so you see the text land in the agent composer.
   function passNote(): boolean {
@@ -761,8 +779,9 @@ export function App(): React.ReactElement {
         else setMenu(null)
         return
       }
-      // ⌘→ with the note open passes the note text to the agent.
+      // ⌘P with the note open passes the note text to the agent. This runs before
-      if (overlay === 'notes' && meta && e.key === 'ArrowRight') { e.preventDefault(); passNote(); return }
+      // the global ⌘P (push), so the note wins while its overlay is up.
+      if (overlay === 'notes' && meta && e.key.toLowerCase() === 'p') { e.preventDefault(); passNote(); return }
       // Search / help modals own the keyboard while open (they handle their own keys).
       if (overlay) return
 
@@ -933,7 +952,7 @@ export function App(): React.ReactElement {
       {/* workbench */}
       <div className="workbench">
         <div className={'col' + (activePanel === 'git' ? ' panel-active' : '') + flashClass} style={{ width: gitW, flex: '0 0 ' + gitW + 'px' }}
-          onMouseDownCapture={() => setActivePanel('git')}>
+          onMouseDownCapture={(e) => { setActivePanel('git'); syncGitSel(e.target) }}>
           <GitPanel branch={proj.branch} changes={proj.changes} committed={NO_COMMITTED}
             commitMsg={commitMsg} setCommitMsg={setCommitMsg}
             onStage={stageGuarded} onUnstage={unstageGuarded} onStageAll={actions.stageAll} onUnstageAll={actions.unstageAll} onCommit={commit} onPush={push}
@@ -943,7 +962,7 @@ export function App(): React.ReactElement {
         <Splitter onDelta={(dx) => { setAutoResize(false); setGitW((w) => clamp(w + dx, 160, 460)) }} />
 
         <div className={'col' + (activePanel === 'tree' ? ' panel-active' : '') + flashClass} style={{ width: treeW, flex: '0 0 ' + treeW + 'px' }}
-          onMouseDownCapture={() => setActivePanel('tree')}>
+          onMouseDownCapture={(e) => { setActivePanel('tree'); syncTreeSel(e.target) }}>
           {proj.tree ? (
             <FileTree tree={proj.tree} openDirs={openDirs} toggleDir={toggleDir} onOpen={openFile}
               onContext={openMenu} activePath={active} ctxPath={menu?.path ?? null}

src/renderer/src/components.tsx

@@ -88,6 +88,7 @@ function GitRow({ c, activePath, activeSide, ctxPath, kbdId, showDir, onOpen, on
   const isActive = activePath === c.path && (!activeSide || activeSide === side)
   return (
     <div className={'git-row' + (isActive ? ' active' : '') + (ctxPath === c.path ? ' ctx' : '') + (kbdId === c.id ? ' kbd' : '')}
+      data-row-id={c.id}
       onClick={() => onOpen(c.path, { diff: true, side })}
       onContextMenu={(e) => onContext(e, { path: c.path, kind: 'git', staged })}
       title={c.path}>
@@ -204,6 +205,7 @@ function TreeNode({ node, depth, openDirs, toggleDir, onOpen, onContext, activeP
       <Fragment>
         {node.path !== '' && (
           <div className={'tree-row folder' + (ctxPath === node.path ? ' ctx' : '') + (kbdPath === node.path ? ' kbd' : '')} style={{ paddingLeft: pad }}
+            data-row-path={node.path}
             onClick={() => toggleDir(node.path)}
             onContextMenu={(e) => onContext(e, { path: node.path, kind: 'dir' })}>
             <span className="tw"><Chevron open={isOpen} /></span>
@@ -225,6 +227,7 @@ function TreeNode({ node, depth, openDirs, toggleDir, onOpen, onContext, activeP
   return (
     <div className={'tree-row' + (activePath === node.path ? ' active' : '') + (ctxPath === node.path ? ' ctx' : '') + (kbdPath === node.path ? ' kbd' : '')}
       style={{ paddingLeft: pad + 2 }}
+      data-row-path={node.path}
       onClick={() => onOpen(node.path)}
       onContextMenu={(e) => onContext(e, { path: node.path, kind: 'file' })}
       title={node.path}>

src/renderer/src/editor.tsx

@@ -48,6 +48,48 @@ function CodeEditor({ path, text, lang, onChange, onContext }: {
     if (top < s.scrollTop) s.scrollTop = top - 20
     else if (bottom > s.scrollTop + s.clientHeight) s.scrollTop = bottom - s.clientHeight + 20
   }
+  /* Tab indents, it does not move focus out of the editor.
+   * Plain Tab on one line inserts spaces. Tab over a multi-line selection
+   * indents every line it touches. Shift+Tab outdents.
+   * We write through execCommand so the browser keeps its own undo history. */
+  function replace(ta: HTMLTextAreaElement, from: number, to: number, text: string): void {
+    ta.setSelectionRange(from, to)
+    if (document.execCommand?.('insertText', false, text)) return
+    // No execCommand (jsdom): splice by hand. Costs the native undo step.
+    onChange(ta.value.slice(0, from) + text + ta.value.slice(to))
+  }
+  function handleTab(e: React.KeyboardEvent<HTMLTextAreaElement>, out: boolean): void {
+    e.preventDefault()
+    const ta = e.currentTarget
+    const pad = ' '.repeat(tabSize)
+    const from = ta.selectionStart
+    const to = ta.selectionEnd
+    if (!out && !ta.value.slice(from, to).includes('\n')) {
+      replace(ta, from, to, pad)
+      ta.setSelectionRange(from + pad.length, from + pad.length)
+      ensureCaretVisible(ta)
+      return
+    }
+    // Rewrite whole lines, so grow the range to the line edges first. A
+    // selection that stops at column 0 leaves that last line alone.
+    const start = ta.value.lastIndexOf('\n', from - 1) + 1
+    const tail = to > from && ta.value[to - 1] === '\n' ? to - 1 : to
+    const nl = ta.value.indexOf('\n', tail)
+    const end = nl === -1 ? ta.value.length : nl
+    const lines = ta.value.slice(start, end).split('\n')
+    const lead = new RegExp(`^(\t| {1,${tabSize}})`)
+    const cut = (line: string): number => (out ? (lead.exec(line)?.[0].length ?? 0) : 0)
+    const next = lines.map((line) => (out ? line.slice(cut(line)) : pad + line)).join('\n')
+    if (next === ta.value.slice(start, end)) return
+    const head = out ? -cut(lines[0]) : pad.length
+    const total = out ? -lines.reduce((n, line) => n + cut(line), 0) : pad.length * lines.length
+    replace(ta, start, end, next)
+    ta.setSelectionRange(Math.max(start, from + head), Math.max(start, to + total))
+    ensureCaretVisible(ta)
+  }
+  function onKeyDown(e: React.KeyboardEvent<HTMLTextAreaElement>): void {
+    if (e.key === 'Tab' && !e.metaKey && !e.ctrlKey && !e.altKey) handleTab(e, e.shiftKey)
+  }
   function handleContext(e: React.MouseEvent<HTMLTextAreaElement>): void {
     e.preventDefault()
     const ta = e.currentTarget
@@ -72,6 +114,7 @@ function CodeEditor({ path, text, lang, onChange, onContext }: {
           <textarea className="ce-ta" value={text} spellCheck={false} autoComplete="off"
             wrap="off" style={{ tabSize }}
             onChange={(e) => { onChange(e.target.value); ensureCaretVisible(e.target) }}
+            onKeyDown={onKeyDown}
             onKeyUp={(e) => ensureCaretVisible(e.currentTarget)}
             onClick={(e) => ensureCaretVisible(e.currentTarget)}
             onContextMenu={handleContext} />

src/renderer/src/markdown.ts

@@ -54,6 +54,40 @@ function inline(src: string): string {
   return s.replace(SENT_RE, (_m, i) => codes[+i])
 }
 
+/** Split one GFM table row into cells. A `\|` is a literal pipe, not a divider. */
+function splitRow(line: string): string[] {
+  const s = line.trim().replace(/^\|/, '').replace(/(?<!\\)\|\s*$/, '')
+  const cells: string[] = []
+  let cur = ''
+  for (let j = 0; j < s.length; j++) {
+    if (s[j] === '\\' && s[j + 1] === '|') { cur += '|'; j++; continue }
+    if (s[j] === '|') { cells.push(cur); cur = ''; continue }
+    cur += s[j]
+  }
+  cells.push(cur)
+  return cells.map((c) => c.trim())
+}
+
+/** The `---`/`:---:` row under a table header. Also fixes each column's align. */
+function tableAligns(line: string): (string | null)[] | null {
+  if (!line.includes('|') && !/^\s*:?-+:?\s*$/.test(line)) return null
+  const cells = splitRow(line)
+  if (!cells.length) return null
+  const aligns: (string | null)[] = []
+  for (const c of cells) {
+    if (!/^:?-{1,}:?$/.test(c)) return null
+    const left = c.startsWith(':'), right = c.endsWith(':')
+    aligns.push(left && right ? 'center' : right ? 'right' : left ? 'left' : null)
+  }
+  return aligns
+}
+
+/** One `<td>`/`<th>`, with the column's alignment when the header set one. */
+function cell(tag: string, text: string, align: string | null): string {
+  const a = align ? ` style="text-align:${align}"` : ''
+  return `<${tag}${a}>` + inline(text) + `</${tag}>`
+}
+
 export function renderMarkdown(text: string): string {
   const lines = text.replace(/\r\n?/g, '\n').split('\n')
   const out: string[] = []
@@ -86,6 +120,28 @@ export function renderMarkdown(text: string): string {
 
     if (/^\s*([-*_])(\s*\1){2,}\s*$/.test(line)) { flushPara(); out.push('<hr />'); i++; continue }
 
+    // GFM table: a header row with pipes, then a `---|---` row with the same
+    // column count. Body rows run until a blank line or a line without a pipe.
+    if (line.includes('|') && i + 1 < lines.length) {
+      const head = splitRow(line)
+      const aligns = tableAligns(lines[i + 1])
+      if (aligns && aligns.length === head.length) {
+        flushPara()
+        i += 2
+        const rows: string[][] = []
+        while (i < lines.length && lines[i].includes('|') && !/^\s*$/.test(lines[i])) {
+          rows.push(splitRow(lines[i])); i++
+        }
+        const body = rows.map((r) => '<tr>' + head.map((_c, n) => cell('td', r[n] ?? '', aligns[n])).join('') + '</tr>').join('')
+        out.push(
+          '<table class="md-table"><thead><tr>' +
+          head.map((c, n) => cell('th', c, aligns[n])).join('') +
+          '</tr></thead>' + (body ? '<tbody>' + body + '</tbody>' : '') + '</table>',
+        )
+        continue
+      }
+    }
+
     if (/^\s*>/.test(line)) {
       flushPara()
       const buf: string[] = []

src/renderer/src/overlays.tsx

@@ -460,7 +460,7 @@ export function HelpModal({ onClose }: { onClose: () => void }): React.ReactElem
  *
  * The overlay only edits the text. Saving is the App's job, because the note
  * must also be written when the window loses focus with the overlay shut.
- * ⌘→ (pass the note to the agent) is the App's job too — it owns the shortcut.
+ * ⌘P (pass the note to the agent) is the App's job too — it owns the shortcut.
  */
 export function NotesModal({ text, onChange, onClose }: {
   text: string
@@ -482,7 +482,7 @@ export function NotesModal({ text, onChange, onClose }: {
           {Icon.note({ style: { color: 'var(--fg-3)' } })}
           <span className="hist-title">Note</span>
           <span className="notes-file">.notes.txt</span>
-          <span className="notes-hint">{Icon.spark()} To agent <kbd>⌘→</kbd></span>
+          <span className="notes-hint">{Icon.spark()} To agent <kbd>⌘P</kbd></span>
           <kbd>esc</kbd>
         </div>
         <textarea ref={ref} className="notes-input" spellCheck={false}

src/renderer/src/styles.css

@@ -315,6 +315,11 @@ kbd { flex:0 0 auto; font-family:var(--mono); font-size:11.5px; color:var(--fg-3
 .md-body pre.md-code { background:var(--bg-1); border:1px solid var(--border); border-radius:8px; padding:12px 14px; overflow:auto; margin:.9em 0; }
 .md-body pre.md-code code { font-size:var(--code-size); background:none; border:0; padding:0; white-space:pre; }
 .md-body strong { color:var(--fg-0); font-weight:600; }
+/* tables scroll on their own so a wide one never widens the whole preview */
+.md-body table.md-table { display:block; width:max-content; max-width:100%; overflow-x:auto; border-collapse:collapse; margin:.9em 0; font-size:.94em; }
+.md-body table.md-table th, .md-body table.md-table td { border:1px solid var(--border); padding:5px 10px; text-align:left; vertical-align:top; }
+.md-body table.md-table th { background:var(--bg-2); color:var(--fg-0); font-weight:600; white-space:nowrap; }
+.md-body table.md-table tbody tr:nth-child(even) { background:var(--bg-1); }
 
 /* gutter change bars (Original / Updated / Split) */
 .ln-row.bar-del { box-shadow:inset 2px 0 0 var(--del); }

test/editor-tab.test.tsx

@@ -0,0 +1,83 @@
+// @vitest-environment jsdom
+import { afterEach, beforeAll, describe, expect, it, vi } from 'vitest'
+import { cleanup, fireEvent, render, waitFor } from '@testing-library/react'
+import React from 'react'
+
+vi.mock('../src/renderer/src/terminals', () => {
+  let n = 0
+  return { Terminal: () => null, lid: () => ++n }
+})
+
+import { App } from '../src/renderer/src/App'
+import { ProjectProvider } from '../src/renderer/src/project'
+
+beforeAll(() => {
+  globalThis.ResizeObserver = class { observe() {} unobserve() {} disconnect() {} } as never
+  if (!Element.prototype.scrollIntoView) Element.prototype.scrollIntoView = () => {}
+})
+afterEach(() => { cleanup(); localStorage.clear() })
+
+function find(c: HTMLElement, sel: string, text: string): HTMLElement | undefined {
+  return Array.from(c.querySelectorAll<HTMLElement>(sel)).find((el) => el.textContent?.trim() === text)
+}
+
+// Open a changed file and switch to the writable buffer.
+async function openEditor(): Promise<HTMLTextAreaElement> {
+  const c = render(<ProjectProvider><App /></ProjectProvider>).container
+  const row = await waitFor(() => {
+    const r = Array.from(c.querySelectorAll<HTMLElement>('.git-row')).find((el) => el.textContent?.includes('UserController.php'))
+    if (!r) throw new Error('git not ready')
+    return r
+  })
+  fireEvent.click(row)
+  await waitFor(() => expect(c.querySelector('.diff-bar')).toBeTruthy())
+  fireEvent.click(find(c, '.seg button', 'Actual')!)
+  return await waitFor(() => {
+    const ta = c.querySelector<HTMLTextAreaElement>('.ce-ta')
+    if (!ta) throw new Error('no buffer')
+    return ta
+  })
+}
+
+function tab(ta: HTMLTextAreaElement, shift = false): boolean {
+  return fireEvent.keyDown(ta, { key: 'Tab', shiftKey: shift })
+}
+
+describe('Tab in the code editor', () => {
+  it('inserts four spaces at the caret instead of moving focus', async () => {
+    const ta = await openEditor()
+    const before = ta.value
+    ta.setSelectionRange(0, 0)
+
+    // fireEvent returns false when a handler called preventDefault, which is
+    // what stops the browser tabbing focus over to the agent column.
+    expect(tab(ta)).toBe(false)
+    await waitFor(() => expect(ta.value).toBe('    ' + before))
+  })
+
+  it('indents every line a multi-line selection touches', async () => {
+    const ta = await openEditor()
+    const lines = ta.value.split('\n')
+    // Select from inside line 1 to inside line 2.
+    ta.setSelectionRange(1, lines[0].length + 2)
+
+    tab(ta)
+    await waitFor(() => {
+      const now = ta.value.split('\n')
+      expect(now[0]).toBe('    ' + lines[0])
+      expect(now[1]).toBe('    ' + lines[1])
+      expect(now[2]).toBe(lines[2])
+    })
+  })
+
+  it('Shift+Tab outdents the current line', async () => {
+    const ta = await openEditor()
+    ta.setSelectionRange(0, 0)
+    tab(ta)
+    await waitFor(() => expect(ta.value.startsWith('    ')).toBe(true))
+
+    ta.setSelectionRange(6, 6)
+    expect(tab(ta, true)).toBe(false)
+    await waitFor(() => expect(ta.value.startsWith('    ')).toBe(false))
+  })
+})

test/markdown.test.ts

@@ -41,4 +41,33 @@ describe('renderMarkdown', () => {
     expect(renderMarkdown('- a\n- b')).toContain('<ul><li>a</li><li>b</li></ul>')
     expect(renderMarkdown('1. a\n2. b')).toContain('<ol><li>a</li><li>b</li></ol>')
   })
+
+  it('renders a GFM table with header, body and inline markup', () => {
+    const html = renderMarkdown('| a | b |\n|---|---|\n| 1 | `x` |\n| 2 | **y** |')
+    expect(html).toContain('<table class="md-table">')
+    expect(html).toContain('<thead><tr><th>a</th><th>b</th></tr></thead>')
+    expect(html).toContain('<td>1</td><td><code>x</code></td>')
+    expect(html).toContain('<strong>y</strong>')
+  })
+
+  it('applies column alignment from the delimiter row', () => {
+    const html = renderMarkdown('| l | c | r |\n| :-- | :-: | --: |\n| 1 | 2 | 3 |')
+    expect(html).toContain('<th style="text-align:left">l</th>')
+    expect(html).toContain('<th style="text-align:center">c</th>')
+    expect(html).toContain('<th style="text-align:right">r</th>')
+    expect(html).toContain('<td style="text-align:center">2</td>')
+  })
+
+  it('handles escaped pipes, ragged rows and pipe-less prose after the table', () => {
+    const html = renderMarkdown('| a | b |\n|---|---|\n| x \\| y | 2 |\n| short |\n\nAfter.')
+    expect(html).toContain('<td>x | y</td>')
+    expect(html).toContain('<td>short</td><td></td>')
+    expect(html).toContain('<p>After.</p>')
+  })
+
+  it('leaves a pipe-bearing paragraph alone when no delimiter row follows', () => {
+    const html = renderMarkdown('a | b\nnot a table')
+    expect(html).not.toContain('<table')
+    expect(html).toContain('<p>a | b not a table</p>')
+  })
 })

test/notes.test.tsx

@@ -0,0 +1,200 @@
+// @vitest-environment jsdom
+//
+// The project note: ⌘N opens it, the text lands in <project>/.notes.txt, and it
+// is written whenever the window loses focus.
+import { afterEach, beforeAll, beforeEach, describe, expect, it, vi } from 'vitest'
+import { act, cleanup, fireEvent, render, waitFor } from '@testing-library/react'
+import React from 'react'
+
+vi.mock('../src/renderer/src/terminals', () => {
+  let n = 0
+  return { Terminal: () => null, lid: () => ++n }
+})
+
+import { App } from '../src/renderer/src/App'
+import { ProjectProvider } from '../src/renderer/src/project'
+
+let stored = ''
+let writes: string[] = []
+
+function stubBridge(): void {
+  const noop = (): void => {}
+  const off = (): (() => void) => noop
+  ;(window as unknown as { helder: unknown }).helder = {
+    platform: 'darwin',
+    clipboard: { writeText: noop, readText: () => '' },
+    project: {
+      current: async () => ({ root: '/repo', name: 'repo' }),
+      open: async () => ({ root: '/repo', name: 'repo' }),
+      openPath: async () => ({ root: '/repo', name: 'repo' }),
+      recent: async () => [],
+    },
+    fs: {
+      tree: async () => ({ name: 'repo', type: 'dir', path: '', children: [] }),
+      readDir: async () => [], files: async () => ({}), read: async () => '',
+      imageDataUrl: async () => '', write: async () => {}, delete: async () => {},
+      create: async () => {}, mkdir: async () => {},
+    },
+    shell: { reveal: noop },
+    notes: {
+      read: async () => stored,
+      write: async (t: string) => { stored = t; writes.push(t) },
+    },
+    git: {
+      load: async () => ({ branch: 'main', changes: [] }),
+      stage: async () => {}, unstage: async () => {}, commit: async () => {},
+      push: async () => ({ ok: true, message: '' }), discard: async () => {},
+    },
+    pty: { available: async () => false, create: async () => 1, write: noop, resize: noop, kill: noop, onData: off, onExit: off },
+    config: { get: async () => (await import('../src/renderer/src/types')).DEFAULT_CONFIG, theme: async () => '' },
+    recent: { get: async () => [], set: async () => {} },
+    search: { content: async () => [], files: async () => [] },
+    dialog: { unsavedClose: async () => 'cancel' },
+    log: { write: noop, path: async () => null, open: async () => {}, reveal: async () => {} },
+    onProjectChanged: off, onConfigChanged: off, onRefresh: off,
+  }
+}
+
+beforeAll(() => {
+  globalThis.ResizeObserver = class { observe(): void {} unobserve(): void {} disconnect(): void {} } as never
+  if (!Element.prototype.scrollIntoView) Element.prototype.scrollIntoView = (): void => {}
+})
+beforeEach(() => { stored = ''; writes = []; stubBridge() })
+afterEach(() => {
+  cleanup()
+  localStorage.clear()
+  delete (window as unknown as { helder?: unknown }).helder
+})
+
+async function boot(): Promise<HTMLElement> {
+  const c = render(<ProjectProvider><App /></ProjectProvider>).container
+  await waitFor(() => { if (!c.querySelector('.git-foot')) throw new Error('not ready') })
+  return c
+}
+
+function pressCmdN(): void {
+  act(() => { window.dispatchEvent(new KeyboardEvent('keydown', { key: 'n', metaKey: true })) })
+}
+
+/** Open the note. The shortcut is registered in an effect, which React may not
+ * have flushed yet when the first paint lands, so keep pressing until it takes.
+ * A second ⌘N with the overlay already open is a no-op. */
+async function openNote(c: HTMLElement): Promise<HTMLTextAreaElement> {
+  await waitFor(() => {
+    pressCmdN()
+    if (!c.querySelector('.notes-modal')) throw new Error('note not open')
+  })
+  return c.querySelector('.notes-input') as HTMLTextAreaElement
+}
+
+function blurWindow(): void {
+  act(() => { window.dispatchEvent(new Event('blur')) })
+}
+
+describe('project note', () => {
+  it('⌘N opens the note overlay', async () => {
+    const c = await boot()
+    expect(c.querySelector('.notes-modal')).toBeNull()
+    await openNote(c)
+    expect(c.querySelector('.notes-modal .notes-file')?.textContent).toBe('.notes.txt')
+  })
+
+  it('loads the note that is already on disk', async () => {
+    stored = 'earlier thoughts\n'
+    const c = await boot()
+    const ta = await openNote(c)
+    await waitFor(() => expect(ta.value).toBe('earlier thoughts\n'))
+  })
+
+  it('writes the note when the window loses focus', async () => {
+    const c = await boot()
+    const ta = await openNote(c)
+    fireEvent.change(ta, { target: { value: 'buy milk' } })
+
+    expect(writes).toEqual([])   // nothing written while typing
+    blurWindow()
+    await waitFor(() => expect(writes).toEqual(['buy milk']))
+    expect(stored).toBe('buy milk')
+  })
+
+  it('does not rewrite the file when nothing changed', async () => {
+    stored = 'unchanged'
+    await boot()
+    await waitFor(() => expect(stored).toBe('unchanged'))
+    blurWindow()
+    blurWindow()
+    expect(writes).toEqual([])
+  })
+
+  it('Esc closes the note and saves it right away', async () => {
+    const c = await boot()
+    const ta = await openNote(c)
+    fireEvent.change(ta, { target: { value: 'quick capture' } })
+
+    act(() => { window.dispatchEvent(new KeyboardEvent('keydown', { key: 'Escape' })) })
+    await waitFor(() => expect(c.querySelector('.notes-modal')).toBeNull())
+    await waitFor(() => expect(writes).toEqual(['quick capture']))
+  })
+
+  it('⌘P passes the note to the agent, then saves and closes it', async () => {
+    const c = await boot()
+    const ta = await openNote(c)
+    fireEvent.change(ta, { target: { value: 'refactor the policy' } })
+
+    const seen: string[] = []
+    const onPaste = (e: Event): void => { seen.push((e as CustomEvent<string>).detail) }
+    window.addEventListener('agentPaste', onPaste)
+    act(() => { window.dispatchEvent(new KeyboardEvent('keydown', { key: 'p', metaKey: true })) })
+    window.removeEventListener('agentPaste', onPaste)
+
+    expect(seen).toEqual(['refactor the policy'])
+    await waitFor(() => expect(c.querySelector('.notes-modal')).toBeNull())
+    await waitFor(() => expect(writes).toEqual(['refactor the policy']))
+  })
+
+  it('⌘P does nothing when the note is empty', async () => {
+    const c = await boot()
+    await openNote(c)
+
+    const seen: string[] = []
+    const onPaste = (e: Event): void => { seen.push((e as CustomEvent<string>).detail) }
+    window.addEventListener('agentPaste', onPaste)
+    act(() => { window.dispatchEvent(new KeyboardEvent('keydown', { key: 'p', metaKey: true })) })
+    window.removeEventListener('agentPaste', onPaste)
+
+    expect(seen).toEqual([])
+    expect(c.querySelector('.notes-modal')).not.toBeNull()
+  })
+
+  it('the header shows the pass-to-agent hint', async () => {
+    const c = await boot()
+    await openNote(c)
+    const hint = c.querySelector('.notes-modal .notes-hint')
+    expect(hint?.textContent).toContain('To agent')
+    expect(hint?.querySelector('kbd')?.textContent).toBe('⌘P')
+  })
+
+  it('the title bar carries the ⌘N note action', async () => {
+    const c = await boot()
+    const btn = [...c.querySelectorAll('.titlebar .tb-btn')]
+      .find((b) => b.textContent?.includes('Note')) as HTMLButtonElement | undefined
+    expect(btn?.querySelector('kbd')?.textContent).toBe('⌘N')
+    expect(btn?.className).not.toContain('on')
+
+    act(() => { btn?.click() })
+    await waitFor(() => expect(c.querySelector('.notes-modal')).not.toBeNull())
+    // The action reads as "on" while the note is open, like the other toggles.
+    expect(btn?.className).toContain('on')
+  })
+
+  it('keeps the text when reopened', async () => {
+    const c = await boot()
+    const ta = await openNote(c)
+    fireEvent.change(ta, { target: { value: 'still here' } })
+    act(() => { window.dispatchEvent(new KeyboardEvent('keydown', { key: 'Escape' })) })
+    await waitFor(() => expect(c.querySelector('.notes-modal')).toBeNull())
+
+    const again = await openNote(c)
+    expect(again.value).toBe('still here')
+  })
+})

test/titlebar.test.tsx

@@ -0,0 +1,105 @@
+// @vitest-environment jsdom
+//
+// The title bar: borderless actions that go accent when on, and the fullscreen
+// shift (macOS hides the traffic lights, so the project name moves to the edge).
+import { afterEach, beforeAll, beforeEach, describe, expect, it, vi } from 'vitest'
+import { act, cleanup, render, waitFor } from '@testing-library/react'
+import React from 'react'
+
+vi.mock('../src/renderer/src/terminals', () => {
+  let n = 0
+  return { Terminal: () => null, lid: () => ++n }
+})
+
+import { App } from '../src/renderer/src/App'
+import { ProjectProvider } from '../src/renderer/src/project'
+
+/** Fires the fullscreen callbacks the App subscribed to. */
+let fullscreenCbs: ((on: boolean) => void)[] = []
+
+function stubBridge(): void {
+  const noop = (): void => {}
+  const off = (): (() => void) => noop
+  ;(window as unknown as { helder: unknown }).helder = {
+    platform: 'darwin',
+    clipboard: { writeText: noop, readText: () => '' },
+    project: {
+      current: async () => ({ root: '/repo', name: 'repo' }),
+      open: async () => ({ root: '/repo', name: 'repo' }),
+      openPath: async () => ({ root: '/repo', name: 'repo' }),
+      recent: async () => [],
+    },
+    fs: {
+      tree: async () => ({ name: 'repo', type: 'dir', path: '', children: [] }),
+      readDir: async () => [], files: async () => ({}), read: async () => '',
+      imageDataUrl: async () => '', write: async () => {}, delete: async () => {},
+      create: async () => {}, mkdir: async () => {},
+    },
+    shell: { reveal: noop },
+    notes: { read: async () => '', write: async () => {} },
+    git: {
+      load: async () => ({ branch: 'main', changes: [] }),
+      stage: async () => {}, unstage: async () => {}, commit: async () => {},
+      push: async () => ({ ok: true, message: '' }), discard: async () => {},
+    },
+    pty: { available: async () => false, create: async () => 1, write: noop, resize: noop, kill: noop, onData: off, onExit: off },
+    config: { get: async () => (await import('../src/renderer/src/types')).DEFAULT_CONFIG, theme: async () => '' },
+    recent: { get: async () => [], set: async () => {} },
+    search: { content: async () => [], files: async () => [] },
+    dialog: { unsavedClose: async () => 'cancel' },
+    log: { write: noop, path: async () => null, open: async () => {}, reveal: async () => {} },
+    onFullscreen: (cb: (on: boolean) => void) => {
+      fullscreenCbs.push(cb)
+      return () => { fullscreenCbs = fullscreenCbs.filter((f) => f !== cb) }
+    },
+    onProjectChanged: off, onConfigChanged: off, onRefresh: off,
+  }
+}
+
+beforeAll(() => {
+  globalThis.ResizeObserver = class { observe(): void {} unobserve(): void {} disconnect(): void {} } as never
+  if (!Element.prototype.scrollIntoView) Element.prototype.scrollIntoView = (): void => {}
+})
+beforeEach(() => { fullscreenCbs = []; stubBridge() })
+afterEach(() => {
+  cleanup()
+  localStorage.clear()
+  delete (window as unknown as { helder?: unknown }).helder
+})
+
+async function boot(): Promise<HTMLElement> {
+  const c = render(<ProjectProvider><App /></ProjectProvider>).container
+  await waitFor(() => { if (!c.querySelector('.git-foot')) throw new Error('not ready') })
+  return c
+}
+
+function setFullscreen(on: boolean): void {
+  act(() => { fullscreenCbs.forEach((cb) => cb(on)) })
+}
+
+describe('title bar', () => {
+  it('shifts left in fullscreen and back out again', async () => {
+    const c = await boot()
+    const bar = c.querySelector('.titlebar') as HTMLElement
+    expect(bar.className).not.toContain('fullscreen')
+
+    await waitFor(() => expect(fullscreenCbs.length).toBe(1))
+    setFullscreen(true)
+    expect(bar.className).toContain('fullscreen')
+
+    setFullscreen(false)
+    expect(bar.className).not.toContain('fullscreen')
+  })
+
+  it('shows the state with the accent, not an On/Off badge', async () => {
+    const c = await boot()
+    const hidden = [...c.querySelectorAll<HTMLButtonElement>('.titlebar .tb-btn')]
+      .find((b) => b.textContent?.includes('Hidden')) as HTMLButtonElement
+    expect(c.querySelector('.titlebar .tb-state')).toBeNull()
+    expect(hidden.className).not.toContain('on')
+
+    act(() => { hidden.click() })
+    await waitFor(() => expect(hidden.className).toContain('on'))
+    expect(hidden.textContent).not.toContain('On')
+  })
+})