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_quick_edit_select_all_layers.py

@@ -0,0 +1,39 @@
+"""Quick Edit can select every layer (Photoshop Layer ▸ Select All Layers).
+
+Photoshop's Layer ▸ Select ▸ All Layers multi-selects the whole layer stack. The
+command box previously had no handling for it, so "select all layers" fell into
+the pixel-marquee branch and ran a document selection instead. It now routes to
+the same button the Layer menu uses, before the pixel "select all" block.
+"""
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+EDITOR = (ROOT / "static" / "js" / "galleryEditor.js").read_text(encoding="utf-8")
+PANEL = (ROOT / "static" / "js" / "editor" / "layer-panel.js").read_text(encoding="utf-8")
+CONTROLS = (ROOT / "static" / "js" / "editor" / "build" / "controls.js").read_text(encoding="utf-8")
+COVERAGE = (ROOT / "docs" / "QUICKEDIT_COVERAGE.md").read_text(encoding="utf-8")
+
+
+def test_select_all_layers_routing_present():
+    assert r"if (/\bselect\b[^.]*\b(?:all|every|everything)\b[^.]*\blayers?\b/.test(p)) {" in EDITOR
+    assert "document.getElementById('ge-select-all-layers')?.click();" in EDITOR
+    assert "'Selected all layers.'" in EDITOR
+
+
+def test_routing_precedes_pixel_select_all():
+    layers = EDITOR.index("document.getElementById('ge-select-all-layers')?.click();")
+    marker = EDITOR.index("// --- Selection commands (deterministic, no model call) ---")
+    assert layers < marker
+    assert layers < EDITOR.index("'Selected all.'")
+
+
+def test_button_is_wired_to_select_all_layers():
+    assert 'id="ge-select-all-layers"' in CONTROLS
+    assert "document.getElementById('ge-select-all-layers')" in PANEL
+    assert "selectAllLayers(state);" in PANEL
+
+
+def test_coverage_doc_marks_select_all_layers_ok():
+    row = next(line for line in COVERAGE.splitlines() if "Layer → Select All" in line)
+    assert "OK" in row
+    assert "fast path" in row