refactor: separate mobile note projection

apps/mobile/src/mobileNoteProjection.test.ts

@@ -0,0 +1,44 @@
+import { describe, expect, it } from 'vitest'
+import { projectMobileNote, projectMobileNotes, type MobileNoteSource } from './mobileNoteProjection'
+
+const sourceNote: MobileNoteSource = {
+  id: 'workflow',
+  type: 'Essay',
+  icon: 'pen-nib',
+  date: 'May 13, 2026',
+  modified: '6h ago',
+  filename: 'workflow-orchestration-kestra.md',
+  tags: ['Design Inspiration', 'Tolaria MVP'],
+  content: [
+    '---',
+    'title: Workflow Orchestration Essay',
+    'type: Essay',
+    '---',
+    '',
+    '# Workflow Orchestration Essay',
+    '',
+    'The current narrative / temptation is everything routed through an LLM.',
+  ].join('\n'),
+}
+
+describe('mobile note projection', () => {
+  it('derives list and editor metadata from markdown content', () => {
+    const note = projectMobileNote(sourceNote)
+
+    expect(note).toMatchObject({
+      id: 'workflow',
+      title: 'Workflow Orchestration Essay',
+      snippet: 'The current narrative / temptation is everything routed through an LLM.',
+      words: 11,
+    })
+  })
+
+  it('keeps projection order stable for note lists', () => {
+    const notes = projectMobileNotes([
+      sourceNote,
+      { ...sourceNote, id: 'release', filename: 'release.md' },
+    ])
+
+    expect(notes.map((note) => note.id)).toEqual(['workflow', 'release'])
+  })
+})