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_border_smooth.py

@@ -0,0 +1,61 @@
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+EDITOR = ROOT / "static/js/galleryEditor.js"
+SELECTION_MASK = ROOT / "static/js/editor/selection-mask.js"
+
+
+def _selection_block(src):
+    start = src.index("// Photoshop Select ▸ Modify: Feather / Expand / Contract.")
+    end = src.index("if (/\\bsubject\\b|\\bperson\\b|\\bpeople\\b/.test(p)) {", start)
+    return src[start:end]
+
+
+def test_border_branch_is_deterministic_local_op():
+    src = EDITOR.read_text(encoding="utf-8")
+    block = _selection_block(src)
+    assert r"if (/\bborder\b/.test(p)) {" in block
+    assert "const base = _selectionMaskAsDocument({ materializeLasso: true });" in block
+    assert "_saveState('Border selection');" in block
+    assert "_refineSelectionMask(base, { border: width })" in block
+    assert "Added a ${width}px border to the selection." in block
+    assert "There is no active selection to border." in block
+
+
+def test_smooth_branch_is_deterministic_local_op():
+    src = EDITOR.read_text(encoding="utf-8")
+    block = _selection_block(src)
+    assert r"if (/\bsmooth\b/.test(p)) {" in block
+    assert "_saveState('Smooth selection');" in block
+    assert "_refineSelectionMask(base, { smooth: amount })" in block
+    assert "Smoothed the selection by ${amount}px." in block
+    assert "There is no active selection to smooth." in block
+
+
+def test_border_smooth_parse_amount_and_ordering():
+    src = EDITOR.read_text(encoding="utf-8")
+    block = _selection_block(src)
+    # Reuse the shared "by N px" parser with Photoshop-style defaults (5 / 4).
+    assert "_selAmount(5)" in block
+    assert "_selAmount(4)" in block
+    assert "Math.min(100, Math.max(1, _selAmount(5)))" in block
+    assert "Math.min(50, Math.max(1, _selAmount(4)))" in block
+    # Border/Smooth come after contract and before the Edit-menu cut branch.
+    assert block.index(r"/\bcontract\b") < block.index(r"if (/\bborder\b/.test(p)) {")
+    assert block.index(r"if (/\bborder\b/.test(p)) {") < block.index(r"if (/\bsmooth\b/.test(p)) {")
+    assert block.index(r"if (/\bsmooth\b/.test(p)) {") < block.index(r"if (/\bcut\b/.test(p)) {")
+
+
+def test_refine_selection_mask_supports_border_and_smooth():
+    src = SELECTION_MASK.read_text(encoding="utf-8")
+    assert "export function refineSelectionMask(mask, options = {}) {" in src
+    assert "const smooth = Math.max(0, Math.min(100, Math.round(Number(options.smooth) || 0)));" in src
+    assert "const border = Math.max(0, Math.min(200, Math.round(Number(options.border) || 0)));" in src
+    assert "if (smooth) result = thresholdMask(blurMask(result, smooth), 128);" in src
+    assert "if (border) {" in src
+
+
+def test_refine_selection_mask_is_imported():
+    src = EDITOR.read_text(encoding="utf-8")
+    assert "refineSelectionMask as _refineSelectionMask," in src