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_layer_styles.py

@@ -0,0 +1,35 @@
+"""Quick Edit adds layer styles / effects (Photoshop Layer ▸ Layer Style, Filter ▸ Layer Effects).
+
+"Add a drop shadow", "add a white stroke", "add a colour overlay" etc. previously
+fell through the command box to the keyword planner (which had no intent), so
+nothing happened. They now route deterministically to the `layers.addStyle` op.
+"""
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+EDITOR = (ROOT / "static" / "js" / "galleryEditor.js").read_text(encoding="utf-8")
+SERVER = (ROOT / "routes" / "editor_agent_routes.py").read_text(encoding="utf-8")
+COVERAGE = (ROOT / "docs" / "QUICKEDIT_COVERAGE.md").read_text(encoding="utf-8")
+
+
+def test_style_routing_present():
+    assert "// --- Layer ▸ Layer Style effects (deterministic, no model call) ---" in EDITOR
+    for t in ("color-overlay", "gradient-overlay", "drop-shadow", "outer-glow", "stroke"):
+        assert f"styleType = '{t}'" in EDITOR
+    assert "await _runQuickControlOp('layers.addStyle', { type: styleType, params });" in EDITOR
+
+
+def test_style_routing_precedes_selection_block():
+    routing = EDITOR.index("await _runQuickControlOp('layers.addStyle', { type: styleType, params });")
+    assert routing < EDITOR.index("// --- Selection commands (deterministic, no model call) ---")
+
+
+def test_addstyle_op_in_both_catalogs():
+    assert "'layers.addStyle':" in EDITOR
+    assert '"layers.addStyle"' in SERVER
+
+
+def test_coverage_doc_marks_layer_effects_ok():
+    row = next(line for line in COVERAGE.splitlines() if "Filter → Layer effects" in line)
+    assert "OK" in row
+    assert "fast path" in row