Scrub numbers by dragging their titles in the sheets and panels (12.12c2)

TASKS.md

@@ -385,7 +385,7 @@ The panel of 4.6 shows and edits what the session holds so far. Each item adds i
 - [x] 12.12a Version 1.2.11, part one: text being typed shown as the pixels it will commit to (`fe6cb2b`); layer effects kept on screen while text is edited, masks are painted and steps undone (`b683acb`). Codex review: 3 rounds, PASS.
 - [x] 12.12b Part two: masks painted anywhere on the canvas (`e753f26`, `2ffb092`), a moved unlinked mask kept in place under effects (`8d2eade`), mask thumbnails' ground white or black as the canvas treats it (`a247676`). Codex review: 1 round; its one finding (two long test comments) fixed.
 - [x] 12.12c1 Part three: numeric label scrubbing (`2d36d6e`, `680a522`) in the tool bars and the layer opacity; the build-warning fixes (`075a71b`, `725b934`) where they change behaviour. Codex review: 3 rounds. Round 1: focused fields left stale, double-click second presses, Feather's amount wrongly resting, test gaps. Round 2: an opacity scrub outliving its layer, boundary gaps. Round 3: the same for the Move bar. All fixed; closed after the third.
-- [ ] 12.12c2 Numeric label scrubbing in the sheets and panels: Canvas Size, Image Size, the colour picker, effects, filters, Hue/Saturation, Levels, Camera Raw.
+- [x] 12.12c2 Numeric label scrubbing in the sheets and panels: Canvas Size, Image Size, the colour picker, effects, filters, Hue/Saturation, Levels, Camera Raw. Codex review: 3 rounds. Round 1: every Mixer row scrubbed where Swift scrubs the HSL families alone, and test gaps (Image Size limits, Camera Raw bindings, filter decimals, centimetres). Round 2: test gaps (a held drag across `reshape`, titles enabled again, Alt-held Camera Raw scrubs). Round 3 passed.
 - [ ] 12.13 Version 1.3: reloading a project changed on disk (`ed5ddea`, merged in 1.3), its manifest-and-sizes fingerprint (`cd4061a`), editing while a project saves, images decoded from memory, the guide for AI agents writing projects.
 - [ ] 12.14 Versions 1.3.1–1.3.2: quitting and closing while text is edited, the I-beam over the canvas, File > Open Recent, Image Size keeping print sizes, Camera Raw's Color Grading layout, coloured slider tracks with double-click reset, colouring only the selected letters, sampling keeping a panel's focus, filters waiting for text editing to finish.
 - [ ] 12.15 Version 1.3.3: the Dither filter.