Changelog

Replace ~95 lines of inline resize code (fields, 4 handlers,

ApplyDetailPanelRatio, FindControl lookups) with the shared

SplitPaneLayout control from UI.Adaptive. The code-behind now

has a single OnDetailPanelRatioChanged event handler for

persistence.

Also adds IsFinite guard in SetDetailPanelRatio to prevent

JSON serialization crash when ratio computes to Infinity.

The split grid uses a * column for the left pane, but the grid's

own Bounds.Width gets inflated by content desired size, preventing

the left pane from shrinking properly. Fixed by reading available

width from the parent Panel (which truly fills available space)

instead of from the grid itself. Both ApplyDetailPanelRatio and

drag resize now use parent width for calculations.

Also added left margin on the left pane so items don't touch the

edge.

When ShowingTrash toggles, the TreeView becomes invisible. Avalonia

tears down TreeViewItem containers and resets IsExpanded to false via

the two-way binding, collapsing all nodes. When returning from trash,

wiki folders (and any expanded regular folders) appeared empty because

their expansion state was lost.

Fix: snapshot _expandedNodeIds when entering trash, then restore

expansion state on all nodes (including wiki folders) when leaving.

Wiki folders with children are always re-expanded by convention since

they don't participate in the _expandedNodeIds tracking.

Resize: Changed ColumnDefinitions from star (*) to Auto sizing for

both panes. Star columns have implicit minimum widths from content,

preventing the left pane from shrinking below ~50%. Both panes now

get explicit programmatic widths set in ApplyDetailPanelRatio() and

OnPanelResizeMoved(), allowing true 25%-75% range.

Selection: Stripped the default ThemeSelectedBrush lavender highlight

on ListBoxItem. Selected items now use ThemeHoverBrush background

with a subtle drop shadow on the .item-card border instead.

The remote delete was only wired into DeletePagePermanentlyAsync

(permanent delete from trash view), but the user expects the file

to be removed from GitHub when they trash the page. Additionally,

SyncAsync restores trashed wiki pages that still exist in the repo,

so the page would reappear on next sync.

Move the GitHub delete call to both TrashPageAsync and

TrashPageFromTreeAsync — the two entry points for trashing a page.

Update confirmation dialogs for wiki pages to say "Delete from Wiki"

and mention GitHub removal. Keep the remote delete in

DeletePagePermanentlyAsync as a fallback for pages trashed before

this change.