Camera Raw filter's model and pixel kernels (12.8a)

TASKS.md

@@ -344,9 +344,13 @@ The panel of 4.6 shows and edits what the session holds so far. Each item adds i
 - 12.7b round 1: FAIL, three findings. A Black & White or Color Balance value past its range aborted the app: the filter's workers now catch `ProjectError`, the sheet shows it and a commit reports it with no step, as Swift; Undo and Redo double a step's ampersand; yellows and cyans are told apart in the kernel test. Headlines semibold, Preserve Luminosity's help asserted.
 - 12.7b round 2: FAIL, one finding: five Color Balance manifest keys sat at zero in every fixture; nine distinct amounts now, each key's value read.
 - 12.7b round 3: FAIL, one finding, the third and last round: the sheet's rows were not held to their fields. Fixed after the round: every Black & White and Color Balance slider is set to a value of its own and read back, Hue to 360; the review's three survivors fail now (`mut-12.7b-r3.log`); the item closes on that.
-- [ ] 12.8a Version 1.2.3, part one: the Camera Raw filter's model and pixel kernels.
-- [ ] 12.8b Version 1.2.3, part two: the Camera Raw panel beside the canvas, its grading wheels turning the way their hue runs (1.2.9's `96edd5f`).
+- 12.8a round 1: FAIL, four findings: the kernel-warning note named a fix that never came (the warnings stand through 1.3.3); 24 of 30 mutants survived on the grade's wiring (kernel argument order, the clip view on an untouched grade, Auto's linear mean, each eye's fields, Offset, Aspect and Constrain Crop, the scope's channels and hues, the samples' hue branches, the Luminance tab); `isValid` had no caller; TASKS.md's 12.8b line lacked the canvas half. `CameraRawWiringTests` added, `isValid` and the vectorscope's dead wrap removed.
+- 12.8a round 2: FAIL, one finding: the curve, mixer and grading call, the sharpen-mask view and the lens flags were not held against their kernels; each is now, with the floats written out by hand, and the minor constants (Grain's scale, a dull colour's reach, Rotate, Scale, Vertical, a green sample's tone) with them.
+- 12.8a round 3: PASS. Its three minor gaps (Horizontal's factor, the sharpen mask's scale, calibration's green and blue fields) pinned after the round (`mut-12.8a-r6.log`).
+- [x] 12.8a Version 1.2.3, part one: the Camera Raw filter's model and pixel kernels.
+- [ ] 12.8b Version 1.2.3, part two: the Camera Raw panel beside the canvas (Swift's docked placement in `FloatingPanel.swift`), its grading wheels turning the way their hue runs (1.2.9's `96edd5f`), the Filter menu's entry, and the canvas half of the tools in `EditorCanvas.swift` (the readout on hover and its clearing on leaving, the three eyedroppers and the guide's press, each refocusing the panel, the guide and targeted drags, their release, `picking`'s four terms).
 - [ ] 12.8c Version 1.2.3, part three: Inner Glow, Image Trim, blur and noise adjustment layers, the layer context menu without 1.2.5's dropped Layer Effects entry (`5d7adba`).
+- [ ] 12.8d A `std::bad_alloc` escapes a catch in `ProjectExportFailureTests::aJPEGRenderThatFindsNoMemoryIsExplained` under a parallel run (seen twice, 12.7b and 12.8a; alone it passes ten times of ten): find the throw and catch it where the house rule says.
 - [ ] 12.9 Version 1.2.4: the finishing filters, stepped keyboard zoom, a steady tool rail and tab strip, the project format's version in one place.
 - [ ] 12.10 Versions 1.2.5–1.2.7: copying and pasting whole layers within and between projects, duplicating every selected layer, crop ratios 3:4 and 9:16 and a crop that starts at the selection, Vignette's defaults, text colour previews.
 - [ ] 12.11 Versions 1.2.8–1.2.10: the document's own pixel budget, PSB, simple Photoshop text as editable text, background-only PSDs, oversized Photoshop layers cropped, clicked text starting on its first baseline, live text opened by a double click with the Move tool (`a5721b2`), marching ants at screen resolution, SVG import (Qt SVG).