fix: make the pulse header draggable

src/components/PulseView.test.tsx

@@ -34,6 +34,7 @@ const mockCommits: PulseCommit[] = [
 ]
 
 const mockInvokeFn = vi.fn()
+const dragRegionMouseDown = vi.fn()
 vi.mock('@tauri-apps/api/core', () => ({
   invoke: (...args: unknown[]) => mockInvokeFn(...args),
 }))
@@ -41,10 +42,14 @@ vi.mock('../mock-tauri', () => ({
   isTauri: () => false,
   mockInvoke: (...args: unknown[]) => mockInvokeFn(...args),
 }))
+vi.mock('../hooks/useDragRegion', () => ({
+  useDragRegion: () => ({ onMouseDown: dragRegionMouseDown }),
+}))
 
 describe('PulseView', () => {
   beforeEach(() => {
     vi.clearAllMocks()
+    dragRegionMouseDown.mockClear()
   })
 
   it('shows loading state initially', () => {
@@ -243,4 +248,33 @@ describe('PulseView', () => {
       expect(screen.getByText('Pulse')).toBeInTheDocument()
     })
   })
+
+  it('wires the Pulse header into the shared drag-region handler', async () => {
+    mockInvokeFn.mockResolvedValue([])
+
+    render(<PulseView vaultPath="/test/vault" />)
+
+    const header = await screen.findByTestId('pulse-header')
+    fireEvent.mouseDown(header)
+
+    expect(dragRegionMouseDown).toHaveBeenCalledTimes(1)
+  })
+
+  it('keeps the expand-sidebar button clickable when the header is draggable', async () => {
+    mockInvokeFn.mockResolvedValue([])
+    const onExpandSidebar = vi.fn()
+
+    render(
+      <PulseView
+        vaultPath="/test/vault"
+        sidebarCollapsed
+        onExpandSidebar={onExpandSidebar}
+      />,
+    )
+
+    const button = await screen.findByRole('button', { name: 'Expand sidebar' })
+    fireEvent.click(button)
+
+    expect(onExpandSidebar).toHaveBeenCalledTimes(1)
+  })
 })

src/components/PulseView.tsx

@@ -1,6 +1,7 @@
 import { useState, useEffect, useCallback, useRef, memo, type KeyboardEvent } from 'react'
 import { invoke } from '@tauri-apps/api/core'
 import { isTauri, mockInvoke } from '../mock-tauri'
+import { useDragRegion } from '../hooks/useDragRegion'
 import type { PulseCommit, PulseFile } from '../types'
 import { relativeDate } from '../utils/noteListHelpers'
 import {
@@ -234,8 +235,15 @@ function PulseHeader({
   sidebarCollapsed,
   onExpandSidebar,
 }: Pick<PulseViewProps, 'sidebarCollapsed' | 'onExpandSidebar'>) {
+  const { onMouseDown } = useDragRegion()
+
   return (
-    <div className="flex shrink-0 items-center justify-between border-b border-border" style={{ height: 52, padding: '0 16px' }}>
+    <div
+      className="flex shrink-0 items-center justify-between border-b border-border"
+      style={{ height: 52, padding: '0 16px', cursor: 'default' }}
+      onMouseDown={onMouseDown}
+      data-testid="pulse-header"
+    >
       <div className="flex items-center" style={{ gap: 8 }}>
         {sidebarCollapsed && onExpandSidebar && (
           <button