feat(v0210): m006 migration — note_revisions 테이블 + capture backfill

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/main/db/migrations/index.ts

@@ -4,8 +4,9 @@ import * as m002 from './m002_due_date.js';
 import * as m003 from './m003_soft_delete.js';
 import * as m004 from './m004_status.js';
 import * as m005 from './m005_ai_disabled.js';
+import * as m006 from './m006_revisions.js';
 
-const migrations = [m001, m002, m003, m004, m005];
+const migrations = [m001, m002, m003, m004, m005, m006];
 
 export function latestVersion(): number {
   return migrations[migrations.length - 1]!.version;

src/main/db/migrations/m006_revisions.ts

@@ -0,0 +1,23 @@
+// v6: note_revisions 테이블 + 기존 notes 의 raw_text 를 edited_by='capture' revision 으로 backfill.
+// FK ON DELETE CASCADE — notes 영구 삭제 시 revision 도 함께 삭제.
+import type Database from 'better-sqlite3';
+
+export const version = 6;
+
+export function up(db: Database.Database): void {
+  db.exec(`
+    CREATE TABLE note_revisions (
+      rev_id     INTEGER PRIMARY KEY AUTOINCREMENT,
+      note_id    TEXT NOT NULL,
+      raw_text   TEXT NOT NULL,
+      edited_at  TEXT NOT NULL,
+      edited_by  TEXT NOT NULL DEFAULT 'user'
+                 CHECK (edited_by IN ('user','capture')),
+      FOREIGN KEY (note_id) REFERENCES notes(id) ON DELETE CASCADE
+    );
+    CREATE INDEX idx_note_revisions_note_id ON note_revisions(note_id, edited_at DESC);
+
+    INSERT INTO note_revisions (note_id, raw_text, edited_at, edited_by)
+      SELECT id, raw_text, created_at, 'capture' FROM notes;
+  `);
+}

tests/unit/m006-migration.test.ts

@@ -0,0 +1,95 @@
+import { describe, it, expect, beforeEach, afterEach } from 'vitest';
+import Database from 'better-sqlite3';
+import { up } from '../../src/main/db/migrations/m006_revisions.js';
+
+describe('m006 migration — note_revisions table', () => {
+  let db: Database.Database;
+
+  beforeEach(() => {
+    db = new Database(':memory:');
+    db.pragma('foreign_keys = ON');
+    db.exec(`
+      CREATE TABLE notes (
+        id                       TEXT PRIMARY KEY,
+        raw_text                 TEXT NOT NULL,
+        ai_title                 TEXT,
+        ai_summary               TEXT,
+        ai_status                TEXT NOT NULL
+                                 CHECK (ai_status IN ('pending','done','failed','disabled')),
+        ai_error                 TEXT,
+        ai_provider              TEXT,
+        ai_generated_at          TEXT,
+        title_edited_by_user     INTEGER NOT NULL DEFAULT 0,
+        summary_edited_by_user   INTEGER NOT NULL DEFAULT 0,
+        user_intent              TEXT,
+        intent_prompted_at       TEXT,
+        created_at               TEXT NOT NULL,
+        updated_at               TEXT NOT NULL,
+        due_date                 TEXT,
+        due_date_edited_by_user  INTEGER NOT NULL DEFAULT 0,
+        deleted_at               TEXT,
+        last_recalled_at         TEXT,
+        recall_dismissed_at      TEXT,
+        status                   TEXT NOT NULL DEFAULT 'active',
+        status_changed_at        TEXT,
+        move_reason              TEXT
+      );
+      INSERT INTO notes (id, raw_text, ai_status, created_at, updated_at)
+        VALUES ('a', 'first text', 'done', '2026-05-01T00:00:00Z', '2026-05-01T00:00:00Z'),
+               ('b', 'second text', 'done', '2026-05-02T00:00:00Z', '2026-05-02T00:00:00Z');
+    `);
+  });
+
+  afterEach(() => { db.close(); });
+
+  it('creates note_revisions table with required columns', () => {
+    up(db);
+    const cols = db.prepare(`PRAGMA table_info(note_revisions)`).all() as Array<{ name: string }>;
+    const names = cols.map((c) => c.name);
+    expect(names).toEqual(
+      expect.arrayContaining(['rev_id', 'note_id', 'raw_text', 'edited_at', 'edited_by'])
+    );
+  });
+
+  it('creates idx_note_revisions_note_id index', () => {
+    up(db);
+    const idx = db.prepare(`PRAGMA index_list(note_revisions)`).all() as Array<{ name: string }>;
+    expect(idx.map((i) => i.name)).toContain('idx_note_revisions_note_id');
+  });
+
+  it('cascades on note delete (FK ON DELETE CASCADE)', () => {
+    up(db);
+    db.prepare(
+      `INSERT INTO note_revisions (note_id, raw_text, edited_at, edited_by)
+       VALUES ('a', 'manual rev', '2026-05-03T00:00:00Z', 'user')`
+    ).run();
+    db.prepare(`DELETE FROM notes WHERE id=?`).run('a');
+    const rows = db.prepare(`SELECT * FROM note_revisions WHERE note_id=?`).all('a');
+    expect(rows).toHaveLength(0);
+  });
+
+  it("backfills existing notes as edited_by='capture' revisions", () => {
+    up(db);
+    const rows = db
+      .prepare(`SELECT note_id, raw_text, edited_at, edited_by FROM note_revisions ORDER BY note_id`)
+      .all() as Array<{ note_id: string; raw_text: string; edited_at: string; edited_by: string }>;
+    expect(rows).toHaveLength(2);
+    expect(rows[0]).toEqual({
+      note_id: 'a',
+      raw_text: 'first text',
+      edited_at: '2026-05-01T00:00:00Z',
+      edited_by: 'capture'
+    });
+    expect(rows[1]).toEqual({
+      note_id: 'b',
+      raw_text: 'second text',
+      edited_at: '2026-05-02T00:00:00Z',
+      edited_by: 'capture'
+    });
+  });
+
+  it('exports version=6', async () => {
+    const mod = await import('../../src/main/db/migrations/m006_revisions.js');
+    expect(mod.version).toBe(6);
+  });
+});

tests/unit/migrations.test.ts

@@ -51,11 +51,11 @@ describe('migration v3 — soft delete columns', () => {
     db.close();
   });
 
-  it('user_version reaches latest (5)', () => {
+  it('user_version reaches latest (6)', () => {
     const db = new Database(':memory:');
     runMigrations(db);
     const row = db.prepare('PRAGMA user_version').get() as { user_version: number };
-    expect(row.user_version).toBe(5);
+    expect(row.user_version).toBe(6);
     db.close();
   });