Photoshop PSD import (Compositor 1.2.0, part one)

TASKS.md

@@ -321,7 +321,10 @@ The panel of 4.6 shows and edits what the session holds so far. Each item adds i
 - 12.4 work: Object mode (U²-Net regions on the model grid, the guided edge, edge steps, smoothing), the session call, W and Tab, the Magic bar (modes, source, a signed Edge field), the canvas press and cursor, the rail icon and hints. Evidence: every test green in the dev image, lint clean; statement deletion over `ObjectSelection.cpp` and targeted mutants over the model, session, bar, canvas, list, hints, wand landing and icons: all caught but the equivalents AGENTS.md names.
 - 12.4 round 1: FAIL, five findings. A trace the wand kernel refuses left the Object worker uncaught and aborted the app (the worker catches `MagicWandError` now; no test reaches it, named in AGENTS.md); three details passed their tests broken: the press handing the view point on (the click now lands through a zoom), the cell row read through the width (a disc low on a 4:3 picture now), the bounds rounding where Swift floors (a click in the last half pixel now), and a minus after a digit (typed now); the icon sheet saved in the working directory (beside the binary now, the stray file gone); Qt's repeated start counted toward three points (dropped first now, Swift's later drops and Chaikin's guard dead and gone); the signal record lacked the mode and settings (read now).
 - 12.4 round 2: PASS. Its residuals: the three-point threshold named equivalent in AGENTS.md; the launch test's screenshot now saved beside its binary, the same cause as the icon sheet.
-- [ ] 12.5a Version 1.2.0, part one: Photoshop PSD import (the reader, channel coder, vectors, document builder, the conversion report sheet).
+- [x] 12.5a Version 1.2.0, part one: Photoshop PSD import (the reader, channel coder, vectors, document builder, the conversion report sheet).
+- 12.5a work: the PSD reader, PackBits, vector masks and live shapes, the document builder, the session's Photoshop import with its sheet, the importer's filter, dropped pictures named and kept apart, the desktop MIME type. Evidence: every test green in the dev image, lint clean; statement deletion over every new and changed file, then targeted mutants for the survivors: all caught but the equivalents AGENTS.md names.
+- 12.5a round 1: FAIL, two findings. A file that opens but cannot be mapped (a pipe, a mount without `mmap`) was refused where Swift reads it (read when the map fails, a pipe tested); the folder's place beside an active layer inside a folder passed its test broken (pinned). Beyond Swift, recorded and fixed for the twin's graph rule: a clipped folder took a link the store refuses (no link now, the base note). AGENTS.md's log categories read `omaphoto`.
+- 12.5a round 2: PASS. Its residual: a read failing after the open is named untested in AGENTS.md (Qt 6.4 refuses to open a directory, probed).
 - [ ] 12.5b Version 1.2.0, part two: the Outer Glow effect, brush Smoothing, and the release's other changes to what the twin holds.
 - [ ] 12.6 Version 1.2.1: camera RAW import through LibRaw with its develop step, middle-button pan, persistent tool settings, Auto Select picking the foreground layer, the reshaped app icon (`45ab8fd`) in `packaging/icons`.
 - [ ] 12.7 Version 1.2.2: Photoshop's remaining blend modes in its groups; Black & White, Color Balance and Invert adjustments.