Build the style, details, and actions sidebar sections

The sidebar completes: the shared style editor gains a second anchor —
StyleEditorLayout carries the geometry (the popover keeps its settled
268/14/7/8 untouched as the default; the sidebar packs columns to its
width with no inner scroller) while every well, the batch display, the
arrow grammar, and the one applyStyle bracket stay the shared
component's. The card anchor is fixed, not tracking: the target is
this card, and the fate walk retires the window when the card goes.
Details renders every unknown frontmatter key read-only in file order —
Card.document already carried them — showing the author's own bytes
where the raw span is a value and the engine's rendering for block
scalars and empties; reserved enhanced-schema keys are ordinary
unknowns, and no keys means no section. Actions: Delete rides the same
tombstone bytes as Backspace and drop-on-trash through a one-line
seam, says nothing about selection, and lets the fate walk dismiss;
Reveal in Finder resolves through the attachment scope so the two
paths cannot disagree. History reserves its m7 slot without drawing a
header no base board can honor.

Claude-Session: https://claude.ai/code/session_01SR4XGjmBE16ZUYWpfFHXwY

Kanban/App/CardWindowHost.swift

@@ -272,6 +272,11 @@ struct CardWindowHost: View {
         if case let .open(store) = phase, let placement {
             CardWindowView(
                 card: placement.card,
+                store: store,
+                // The app's list, not the board's: the quick-style recents the sidebar's embedded
+                // editor feeds are app-wide state (02-architecture.md § Per-board app state), so
+                // they come from the model every window shares rather than from this board's store.
+                recents: appModel.styleRecents,
                 cardFolder: Self.cardFolder(root: store.rootURL, placement: placement),
                 bodyPresentation: bodyPresentation,
                 bodySession: session.body,