Merge branch 'port-d'

# Conflicts:
#	AGENTS.md

TASKS.md

@@ -446,13 +446,13 @@ Reviews for this section ran on codex `gpt-6.1-sol` at `max` (agent `codex-sol`)
 - [x] 13.12 Part two: masks as Photoshop's: the button reveals the selection, Alt-click shows a mask alone (`b3419ab`).
 - 13.12 port (agent): the mask button reveals the selection, Alt-click hides it; Alt-click on a mask thumbnail shows the mask alone (`viewsMaskAlone`, `toggleMaskAlone`, `drawMaskAlone`, a white ring, `MaskAloneBadge`); `liveFolderMaskClip` moved to `EditorCanvas+Masks.cpp`. No review yet.
 - [x] 13.13 Part three: Ctrl flips Auto Select both ways and Shift the aspect lock, live in the bar (`bca8f13`, `03d692c`); Move bar values apply without Apply as one step (`686d8c7`); resize handles snap (`c459f88`).
-- 13.13 port (agent): held Ctrl flips Auto Select both ways and Shift the lock, shown in the bar (`HeldModifiers`); Ctrl+Shift adds either way; the bar's typed, stepped and scrubbed values open a `fromFields` edit applied as one step when the field is left or the scrub let go, Escape throwing it away, a canvas drag applying it first; resize handles snap (`snappedResizePoint`), Ctrl free, a turned layer not; tests in `TransformPressTests`, `TransformInspectorTests`, `ScrubbableTransformTests`, `ResizeSnapTests`, `ResizeSnapCanvasTests`. Survivors recorded: the group branch's flip, the edge tie, `before`'s read. No review yet.
+- 13.13 port (agent): held Ctrl flips Auto Select both ways and Shift the lock, shown in the bar (`HeldModifiers`); Ctrl+Shift adds either way; the bar's typed, stepped and scrubbed values open a `fromFields` edit applied as one step when the field is left or the scrub let go, Escape throwing it away, a canvas drag applying it first; resize handles snap (`snappedResizePoint`), Ctrl free, a turned layer not; tests in `TransformPressTests`, `TransformInspectorTests`, `ScrubbableTransformTests`, `ResizeSnapTests`, `ResizeSnapCanvasTests`. Survivors recorded: `before`'s read. No review yet.
 - [x] 13.14 Part four: tabs drag to reorder, the ones that don't fit gather in a menu (`1faf7a0`).
 - 13.14 port (agent): tests in `ProjectTabLayoutTests` (Swift's six and the bounds), `ProjectTabDragTests` (drag, slide, stacking, landing, threshold, busy, lost release, a close mid-drag, the overflow pill and its menu), `ProjectWorkspaceTests` (`moveTab`) and `ProjectWorkspaceViewTests`. Survivor recorded: reporting `ended` after a click that never dragged (equivalent but after a lost release); `span`'s empty guard and `contentWidth`'s pill fallback removed as dead. No review yet.
 - [x] 13.15 Part five: Layer › Ungroup Layers (Ctrl+Shift+G) and in a folder's context menu (`1318f1e`, `6c3b9a5`); Alt over a mask thumbnail shows the duplicate pointer with an eye (`6955a6f`).
 - 13.15 port (agent): tests in `GroupSessionTests` (Swift's three and more), `LayerContextMenuTests`, `CompositorMenusTests`, `KeyboardShortcutsTests` and `LayerDragGestureTests` (the eye pointer). Survivor recorded: the context entry gated by `canEditLayers` (equivalent: the right-click makes the folder active); Swift's validation guard left out as dead. No review yet.
 - [x] 13.16 Versions 1.4.2–1.4.3: Liquify keeps pixels sharp (`7164dd4`), Smudge without ghost copies (`ad9ad7c`), the Blur brush's own Radius (`504129d`), Blur, Smudge and Liquify on big canvases (`095da2f`).
-- 13.16 port (agent): Liquify on per-pixel offsets from the untouched layer (MetalWarp's `warp_push` on the CPU), Smudge carrying only the last dab's pixels at the strength, dabs a pixel apart; the Blur's own Radius (`blurRadius`, the bar's row), its sigma Swift's `min(min(50, max(0.5, r)) / perPixel, sidePixels / 2)` in 13.11's grid; `blurSample` returns the sharp sample with `render`, blurring only the pieces the brush reaches, each tile's clone piece cut once; `maxDiameter` 2100 and the warp commit's thinned points; tests in `SmudgeLiquifyTests`, `WarpStrokeTests`, `LargeCanvasBrushTests` (Swift's `largestBrushCommits`, `blurPiecesMatchTheWhole`), `BlurBrushTests`, `BlurToolTests`, `BrushControlsTests`, `BrushTests`. Survivors recorded: buffer allocation for every mode, the thinning's `kept`, the sample's edge reads at zero weight. No review yet.
+- 13.16 port (agent): Liquify on per-pixel offsets from the untouched layer (MetalWarp's `warp_push` on the CPU), Smudge carrying only the last dab's pixels at the strength, dabs a pixel apart; the Blur's own Radius (`blurRadius`, the bar's row), its sigma Swift's `min(min(50, max(0.5, r)) / perPixel, sidePixels / 2)` in 13.11's grid; `blurSample` returns the sharp sample with `render`, blurring only the pieces the brush reaches, each tile's clone piece cut once; `maxDiameter` 2100 and the warp commit's thinned points; tests in `SmudgeLiquifyTests`, `WarpStrokeTests`, `LargeCanvasBrushTests` (Swift's `largestBrushCommits`, `blurPiecesMatchTheWhole`), `BlurBrushTests`, `BlurToolTests`, `BrushControlsTests`, `BrushTests`. Survivors recorded: buffer allocation for every mode. No review yet.
 - [x] 13.17 Version 1.4.4: quit works mid-gradient or with a dialog open (`1aad384`); Dither › Scanlines (CRT) on all cores (`9c99853`, `cd2f998`).
 - 13.17 port (agent): `settlePendingEdits` applies a pending gradient and pixel move and cancels open dialogs before Quit asks, `confirmQuit` refuses while managing; Scanlines (CRT) with Glow, Dots and Wobble, the kernel cd2f998's with GCD swapped for `dither_bands` on PoolMap (forced difference); tests in `QuitPendingEditsTests` and `ScanlinesTests`. Survivors recorded: the glow pad and edge mode, the band split. No review yet.
 - [x] 13.18 Version 1.4.5: Camera Raw curves as Photoshop's (`60d9117`): the smooth parametric curve and the per-channel point curves, Refine Saturation's new meaning (0 the RGB curve, −100 brightness alone, above 0 stronger colour) and its words; the graph: a press picks a point, divider or tonal region once and keeps it through the drag, a region drag lifts or lowers that region, dividers move in the bottom strip and stay ordered, point mode picks by distance, adds and drags a new point at once, keeps inner points ordered and moves the end points' outputs alone, the chosen point lit and the readout following it, a new channel or preset clearing the choice.