Merge 13.17 and 13.18: a dragged curve point stays on its neighbour, bands match one band, SheetTeardownTests on 13.4a's sheet; AGENTS and TASKS

TASKS.md

@@ -451,8 +451,10 @@ Reviews for this section ran on codex `gpt-6.1-sol` at `max` (agent `codex-sol`)
 - [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.
 - [ ] 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`).
-- [ ] 13.17 Version 1.4.4: quit works mid-gradient or with a dialog open (`1aad384`); Dither › Scanlines (CRT) on all cores (`9c99853`, `cd2f998`).
-- [ ] 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.
+- [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.
+- 13.18 port (agent): the fitted parametric curve, the tone curve per channel, Refine Saturation's new meaning and words; the graph's one drag (`CameraRawColorControls+Curve.cpp`); fixes beyond Swift: a preset drops the chosen point, a point dragged onto its neighbour stays and stays dragged; tests in `CameraRawCurveTests` and `CameraRawCurveGraphTests`. Survivor recorded: the all-zero shortcut. No review yet.
 - [ ] 13.19 Release OmaPhoto 1.4.5: version, change log, README, AGENTS.md, the acceptance run, distro checks, packages, live installs, the acceptance checklist.
 
 ## Skills by phase