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feat(ui): gear to the rail, EDIT on the panel edge, preview undo/redo

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Three creator directives (2026-11-01), done ahead of the surge.

**Gear moved to the preview rail** — first tab, orange (Brush.Attention), gear icon
only. Left-click opens the same app menu the top bar gear owned (Settings / Bug /
Feature / About), right-click goes straight to App Settings; both behaviours moved
with it, so nothing lost an entry point. TopBar keeps the wordmark and EDIT.

**EDIT right edge aligned to the layers panel.** The work area is margin 8 + a 360px
column, the top bar is padding 16, so the shared edge is 352 inside the bar. TopBar
column 0 is now a fixed 352 grid with EDIT right-aligned in it — alignment by
arithmetic instead of by eye.

**Preview undo/redo: Ctrl+Z / Ctrl+Shift+Z.** Models/PreviewHistory snapshots element
REFERENCES plus geometry, visibility, order and membership — a deep clone would mirror
every property of a dozen element subclasses and quietly miss the next one added.
One snapshot per gesture (pushed at drag/resize start, never in the move loop), bounded
at 50, redo survives multiple undos, cleared on layout load. Gated on EditingActive:
undo while the preview shows program output would rewrite a scene nobody is looking at.

Honest scope, in the type's doc comment: layout edits only. Colour/opacity/border/font
edits are not captured yet, so Ctrl+Z after one of those restores the last layout change.

6 tests in PreviewHistoryTests; 19 pass across it and the neighbouring UI classes; Debug
and Release both build at 0 warnings.
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gramps
2026-11-01 07:46:10 -08:00
parent bd669f2e73
commit fdb27f0758
14 changed files with 403 additions and 55 deletions
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TASKS.md
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@@ -52,7 +52,7 @@ persisted; renderer mirrors `Services/ChatBoxRenderer.cs`.
| 34 | ☐ | Scheduled streams (Text-drawer version) | [`task-34`](TASKS/task-34-scheduled-streams.md) |
| 35 | ☐ | Scene-linked audio | [`task-35`](TASKS/task-35-scene-linked-audio.md) |
| 37 | ☐ | Defaults vs current layout split (build-id); enables one-click revert to defaults | [`task-37`](TASKS/task-37-defaults-current-split.md) |
| — | ☐ | **Preview undo (Ctrl+Z / Ctrl+Shift+Z)** — in edit mode, revert the last preview change (drag, resize, add, remove, property edit); bounded stack, cleared on scene change or layout load. The natural partner to 37: undo covers the slip, defaults cover the mess | this line |
| — | ✅ | **Preview undo (Ctrl+Z / Ctrl+Shift+Z)** — done 2026-11-01: `Models/PreviewHistory` + `MainViewModel.Preview`, one step per gesture, gated on `EditingActive`, cleared on layout load. Property edits not yet in the stack | [`ui-surface`](docs/ai/ui-surface.md) |
| 39·2 | ☐ | YPP slice 2: Analytics scopes, watch-hours/Shorts velocity + ETA | [`task-39`](TASKS/task-39-ypp-journey-tracker.md) |
| 49 | ☐ | Chat profanity filter: local, opt-in, **non-persistent**, user-supplied word list | [`task-49`](TASKS/task-49-chat-profanity-filter.md) |
| 50 | ☐ | One-button publish of the local recording (resumable upload) | [`task-50`](TASKS/task-50-publish-recording.md) |