feat: add expandable mobile property pickers

apps/mobile/src/mobilePropertyPicker.test.ts

@@ -0,0 +1,21 @@
+import { describe, expect, it } from 'vitest'
+import { mobilePropertyDisplayValue, nextMobilePropertyPicker } from './mobilePropertyPicker'
+
+describe('nextMobilePropertyPicker', () => {
+  it('opens a selected picker and closes it when selected again', () => {
+    expect(nextMobilePropertyPicker({ current: null, selected: 'type' })).toBe('type')
+    expect(nextMobilePropertyPicker({ current: 'type', selected: 'type' })).toBeNull()
+  })
+
+  it('switches between editable property pickers', () => {
+    expect(nextMobilePropertyPicker({ current: 'type', selected: 'status' })).toBe('status')
+  })
+})
+
+describe('mobilePropertyDisplayValue', () => {
+  it('normalizes missing property values for compact property rows', () => {
+    expect(mobilePropertyDisplayValue({ value: undefined })).toBe('None')
+    expect(mobilePropertyDisplayValue({ value: '' })).toBe('None')
+    expect(mobilePropertyDisplayValue({ value: 'Essay' })).toBe('Essay')
+  })
+})