feat(photo-editor): Ajax Image Editor client (Photoshop-parity tools)

Photoshop-parity editor client: layers, selection/masking, brushes,
smart filters, LUT import, Quick Edit, mobile gestures, workspaces,
batch operations, and the service-worker versioning (v978->v1006).

Source: vendor/photocraft (ad1cff44) photo-editor client files, merged
onto upstream/dev (a8c147b2). Conflict resolution documented in
pr_work/A_conflicts.md; editor files taken from vendor/photocraft
(upstream's editor is an earlier snapshot of the same feature).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/e2e/photo-editor/text-font-swap.spec.js

@@ -0,0 +1,41 @@
+const { test, expect } = require('@playwright/test');
+const crypto = require('crypto');
+const { openBlankEditor } = require('./helpers');
+
+const FONTS = [
+  'Inter', 'Roboto', 'Playfair Display', 'Lobster',
+  'Bebas Neue', 'Roboto Mono', 'Georgia', 'Courier New',
+];
+const md5 = (buf) => crypto.createHash('md5').update(buf).digest('hex');
+
+test('text font dropdown renders a distinct face for each font', async ({ page }) => {
+  await openBlankEditor(page, { width: 900, height: 600 }, 'Font swap');
+  await page.evaluate(() => {
+    document.querySelectorAll('.ge-tour-close,.ge-protip,.ge-tip,[class*="protip"]').forEach((e) => e.remove());
+  });
+  await page.evaluate(async () => {
+    const tool = document.querySelector('[data-tool="text"]');
+    if (tool) tool.click();
+    await window.geEditorControl.invoke('text.add', { text: 'AWjgyq 128', x: 60, y: 80 });
+  });
+  await page.waitForTimeout(400);
+
+  const box = await page.locator('.ge-main-canvas').boundingBox();
+  expect(box).toBeTruthy();
+
+  const hashes = {};
+  for (const font of FONTS) {
+    await page.evaluate((f) => {
+      const sel = document.getElementById('ge-text-font');
+      sel.value = f;
+      sel.dispatchEvent(new Event('input', { bubbles: true }));
+      sel.dispatchEvent(new Event('change', { bubbles: true }));
+    }, font);
+    await page.waitForTimeout(250);
+    const shot = await page.screenshot({ clip: box });
+    hashes[font] = md5(shot);
+  }
+
+  const distinct = new Set(Object.values(hashes)).size;
+  expect(distinct, `distinct font hashes: ${JSON.stringify(hashes)}`).toBeGreaterThanOrEqual(5);
+});