feat: prepare ShiftPress 3.1.0 dark UI and print safeguards

.impeccable/mocks/shiftpress-midnight-reference.json

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+{
+  "prompt": "Use case: style-transfer\nAsset type: ShiftPress native Windows desktop application Midnight dark-theme reference mockup.\nInput image 1 is the edit target: the existing ShiftPress Rose reference. Preserve its EXACT client-area composition, framing, aspect ratio, typography, region positions, region sizes, spacings, borders, control types, icons, and control states. Make a strict theme-color variant only. Do not redesign or recompose.\nPrimary request: replace the Rose color palette with a consistently dark Midnight navy palette, and change ONLY the dropdown value \"Rose\" to \"Midnight\". Preserve all other visible text verbatim, including app name, subtitle, version, template folders, printer, labels, selected counts, and the different Night/Day dates.\nColor palette: window background #121821; panels/card bodies #1B2532; input fields #131C27; top header #101B2B; borders #44556B; primary text #F2F6FC; supporting text #B4C2D4; action/link/selected-control color #8EBBFF. Primary Print button fill #8EBBFF with dark text #102038. Existing pink subtitle, links, button outlines, printer icon, checkbox fills, and selected radio accents become #8EBBFF. Night card title #8BCFF5 on header fill #203248; Day card title #ECC17E on header fill #332D24. Keep the source's subtle native flat tonal treatment, using no glow or decorative gradients.\nText (verbatim, position unchanged): \"ShiftPress\"; \"Schedules, ready for the next shift.\"; \"Theme\"; \"Midnight\"; \"How to use\"; \"v3.0.0\"; \"Print setup\"; \"Night templates\"; \"Templates › Night\"; \"Day templates\"; \"Templates › Day\"; \"Printer\"; \"Microsoft Print to PDF\"; \"Setup...\"; \"Prepare print run\"; \"Choose exactly which schedules go to print.\"; \"Reset run\"; \"Night schedule\"; \"Day schedule\"; \"Include Night schedule\"; \"Include Day schedule\"; \"Single date\"; \"Date range\"; \"Date\"; \"09/05/2026\"; \"09/06/2026\"; \"Selected · 1 document\"; \"Print scope: 2 schedules selected\"; \"1.  Night — 09/05/2026 — 1 document\"; \"2.  Day — 09/06/2026 — 1 document\"; \"Preflight runs when you select Print.\"; \"Print 2 schedules\".\nConstraints: two peer schedule cards remain side by side with Night left and Day right; both included checkboxes stay checked; both Single date radios stay selected; both Date range radios stay unselected. Preserve the calendar and dropdown icons, printer icon, and all original controls. Complete client area only, no OS title bar or external frame. All surfaces remain dark, with no white panels or light-mode regions. No extra controls, labels, captions, palette swatches, imagery, decoration, watermarks, or logos. Retain exact composition and all dates/text except Rose becoming Midnight.",
+  "tool": "image_gen",
+  "mode": "built-in edit",
+  "generatedAt": "2026-09-05T08:40:43.301Z",
+  "referenceImage": ".impeccable/mocks/shiftpress-rose-reference.png",
+  "generatedImage": "/Users/ryan/.codex/generated_images/01a070b8-a25f-7aa0-a164-a5c11f119b3c/exec-16b8efc8-0e25-416c-b01a-0b6426cc9208.png",
+  "outputImage": ".impeccable/mocks/shiftpress-midnight-reference.png",
+  "theme": "Midnight",
+  "approved": false,
+  "review": "Generated dark Midnight palette variant preserving the source client-area composition, controls, states, labels, and dates; theme dropdown changed from Rose to Midnight. Image generation is a visual reference, not a guarantee of exact rendered hex values."
+}

.impeccable/mocks/shiftpress-rose-reference.json

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+{
+  "prompt": "Use case: ui-mockup. Edit the prior ShiftPress mockup into the final DARK-ONLY Rose theme. Preserve its excellent functional layout, content order and straight-on desktop application client-area framing. No light mode anywhere. Output 1484x1060 pixels or the same aspect and framing as the input. This image is the measured reference for a real Tkinter Windows app.\n\nReplace every pale or white surface with deliberate dark surfaces: window #15131B, main panels #211D29, recessed inputs #191620, borders #514558, primary text #F8F3F8, supporting text #C0ADC3. Header band #22182A, title pure white, subtitle muted rose #E8A4CC. Rose/pink #E59AC8 is the key color: filled primary Print button with very dark #251522 text; selected radio/checkbox rose; outlined Setup button rose; Reset run rose. Night panel header #252339 and title #B7B5ED; Day panel header #35272B and title #E9B77E. All text must remain clearly legible, flat color fills, fine borders; no gradient, no glows, no shadows, no ornamental imagery.\n\nHeader: left \"ShiftPress\" and \"Schedules, ready for the next shift.\" Right place a native dropdown labeled \"Theme\" showing \"Rose\" with chevron, then outlined \"How to use\", then small \"v3.0.0\". Theme menu has only Rose and Midnight (not open).\nKeep setup strip: \"Print setup\" (sentence case, not all caps); groups Night templates / Templates › Night, Day templates / Templates › Day, Printer / Microsoft Print to PDF; Setup… button.\nKeep \"Prepare print run\", supporting instruction, and Reset run aligned right.\nKeep Night schedule and Day schedule peer cards with checked include controls, selected Single date vs Date range native radios side by side, date input 09/05/2026 and 09/06/2026, and Selected · 1 document.\nKeep full-width Print scope: 2 schedules selected, two exact job lines, printer name.\nBottom: \"Preflight runs when you select Print.\" and large pink \"Print 2 schedules\" button.\nMake this feel like a beautifully crafted professional Windows utility with rich plum-black surfaces and precisely balanced pink accents. No white panels, no light mode, no dashboard navigation, no new functionality beyond the theme selector.",
+  "tool": "built-in image_gen",
+  "purpose": "Dark-only Rose design reference requested by the user; native controls remain semantic.",
+  "reference": "shiftpress-rose-reference.png"
+}