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/FutureCommands.swift

@@ -85,9 +85,10 @@ struct FindSteppingCommands: View {
 /// did not move, the validation and the action filled in — and the pair also carries the clause that
 /// joins them, "Edit Body disables while Raw Source is active" (05-card-window.md).
 ///
-// m6-card-sidebar: History is a plain command that focuses the sidebar's History section, and
-// disables outright on mode `none` / repo-nested boards once that section exists (05-card-window.md,
-// 07-sync-collab.md). It remains unconditionally disabled here — that surface does not exist yet.
+// m7-git: History is a plain command that focuses the sidebar's History section, and disables
+// outright on mode `none` / repo-nested boards once that section exists (05-card-window.md,
+// 07-sync-collab.md). It remains unconditionally disabled here — the sidebar reserves the section's
+// place (`CardWindowView.historySlot`) but draws nothing, so there is still no surface to focus.
 struct CardViewCommands: View {
     var body: some View {
         EditBodyCommand()