Reorder: OnSceneElementsReordered now calls SaveLayoutNow() (was debounced
ScheduleSave) so a drag-drop persists instantly — one write stores the new
layer list (Source.SortOrder) and each layer's preview geometry (X/Y/W/H) in
the same rows. Reference: WPF ListBox drag-reorder requires an explicit persist
at drop; a debounce window lets a crash lose the drop.
Recording save dialog (RenameRecordingDialog.xaml): height 276→304 so the
Cancel/Save button row is no longer obscured; Save button named
SaveRecordingButton so the sizing test can assert it sits inside the client area.
Tests: deterministic seam test now asserts the dragged layer's geometry (preview
layout) is persisted with the new order; sizing test asserts 304 + textbox and
button-row bottoms within client area. 308/308 green.
Creator reported the layer reorder still "doesn't save" after the 08:18
fix (c117885). The existing Good Dog test short-circuited EndListDrag — it
called OnSceneElementsReordered() directly, so the actual
List_PreviewMouseLeftButtonDown/Move/Up handlers were never exercised
(synthetic RaiseEvent can't: e.GetPosition reads the physical cursor).
New RealMouseDrag_OnTheLayerList_PersistsTheReorder drives SetCursorPos +
mouse_event (Win32 input injection, the same technique UI-automation
tooling uses) so the REAL handlers run: click ImgC's row, drag it onto
ImgA's row on screen, release, then pump until the debounced save writes
the DB. Green: DB ends at [Background, ImgC, ImgA, ImgB] — the seam is
proven end-to-end. If the creator still sees a revert, the run binary was
stale (Debug exe 08:42 postdates the fix commit 08:18) or another deploy.
Reference: Win32 SendInput/mouse_event input injection for WPF e2e
(mouse_event docs / UI-automation tooling pattern).
List_PreviewMouseMove reorders StagedScene.Elements via RemoveAt/Insert,
bypassing SceneGraph's mutation surface, but never scheduled a save — the
new z-order was lost on restart. The drop now sets _dragReordered and
EndListDrag funnels it through MainViewModel.OnSceneElementsReordered()
(InvalidateBake + ScheduleSave, same background-save path as every other
mutation). Integration test (RealApp + temp DB) reproduces the exact
code-behind mutation and asserts the debounced save lands the new Source
SortOrder. Derivation reference: standard WPF ItemsControl drag-reorder
pattern (OBS layering semantics: bottom-most layer = index 0).
gramps