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/test_editor_preflight.py

@@ -0,0 +1,75 @@
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+def _read(rel):
+    return (ROOT / rel).read_text()
+
+
+def test_preflight_module_has_the_four_setup_steps():
+    src = _read("static/js/editor/preflight.js")
+    assert "export function createPreflight(" in src
+    assert "export const PREFLIGHT_STEPS" in src
+    # The four steps the user asked for.
+    assert "id: 'provider'" in src
+    assert "id: 'editModel'" in src
+    assert "id: 'agentModel'" in src
+    assert "id: 'bgRemover'" in src
+    # Automatic detection + manual override.
+    assert "getAIModelsStatus()" in src
+    assert "resolveQuickEditModel()" in src
+    assert "resolveQuickEditAgentModel()" in src
+    assert "ge-preflight-done" in src  # manual override store
+    assert "ge-preflight-dismissed" in src  # don't-show-on-open store
+    # The agent model is optional (encouraged, not required).
+    assert "optional: true" in src
+    # The model steps link straight to the AI settings dialog.
+    assert "window.geEditorAiSettings?.open('ge-ai-command-model')" in src
+    assert "window.geEditorAiSettings?.open('ge-ai-command-agent-model')" in src
+    # A done row no longer offers an action ("why does it say Retry?").
+    assert "const actions = done ? '' :" in src
+    assert "required ready" in src
+
+
+def test_preflight_is_wired_into_the_editor():
+    editor = _read("static/js/galleryEditor.js")
+    assert "import { createPreflight } from './editor/preflight.js';" in editor
+    assert "createPreflight({ canvasArea })" in editor
+    assert "_preflight?.maybeOpen();" in editor
+    assert "setupBtn.id = 'ge-setup-btn';" in editor
+    assert "_preflight?.destroy();" in editor
+
+
+def test_ai_models_exposes_status_for_the_checklist():
+    src = _read("static/js/editor/ai-models.js")
+    assert "export function getAIModelsStatus()" in src
+    assert "_aiModelsStatus = { ready: true, models: loaded" in src
+    assert "_aiModelsStatus = { ready: false, models: [], error:" in src
+    assert "ge:ai-models-status" in src
+
+
+def test_preflight_is_precached_and_styled():
+    sw = _read("static/sw.js")
+    assert "'/static/js/editor/preflight.js'" in sw
+    assert "'/static/js/editor/ai-settings.js'" in sw
+    css = _read("static/css/13-image-editor.css")
+    assert ".ge-preflight-card" in css
+    assert ".ge-preflight-row.is-done" in css
+    assert ".ge-preflight-row.is-todo" in css
+    assert ".ge-preflight-row.is-optional" in css
+    assert ".ge-setup-btn" in css
+
+
+def test_ai_settings_dialog_is_wired_and_precached():
+    editor = _read("static/js/galleryEditor.js")
+    settings = _read("static/js/editor/ai-settings.js")
+    assert "import { createAiSettings } from './editor/ai-settings.js';" in editor
+    assert "createAiSettings({ container })" in editor
+    assert "window.geEditorAiSettings = _aiSettings;" in editor
+    assert "_aiSettings?.destroy();" in editor
+    assert "export function createAiSettings(" in settings
+    assert 'id="ge-ai-command-model"' in settings
+    assert 'id="ge-ai-command-agent-model"' in settings
+    assert 'id="ge-ai-command-selfcheck"' in settings
+    assert "Recommended, not required" in settings