Build Preview mode rendering

The card body's resting state: swift-markdown (pinned 0.8.0, smart
typography off — Preview renders the bytes on disk) parsed into a pure
BodyMarkup model with UTF-8 source offsets, rendered on one hosted
TextKit 1 NSTextView — chosen because find-in-text is NSTextFinder,
checkbox clicks reuse AppKit character hit-testing, links are .link
attributes, and NSTextTable's automatic layout is exactly the
columns-sized-to-contents rule. The GFM subset renders per 05; HTML
stays verbatim code-styled text; relative images resolve against the
card folder while remote URLs are never fetched, drawing a quiet chip
instead. Task checkboxes are live: a click flips exactly one byte
through a fresh-read, refuse-uneditable, stamp, atomic-replace write —
the app's only offset-addressed write, so a moved target refuses as
staleTarget and what the user saw decides the direction, netting one
toggle on a double-click. Empty bodies open in Edit per CardBodyMode's
opening rule, applied once; the Edit surface itself stays an honest
read-only stub until its card. FindCommand prefers the card body's
find over board search when a card window is focused.

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

Kanban/UI/Board/BoardSearchField.swift

@@ -83,13 +83,25 @@ struct FindCommand: View {
 
     @FocusedValue(\.boardStore) private var store
     @FocusedValue(\.boardSearch) private var search
+    @FocusedValue(\.cardBody) private var cardBody
+
+    /// **The card window wins when it is the focused scene**, which is the whole of 11's split
+    /// ("Board window: board search; card window: find-in-text"): the two never both publish, so
+    /// this reads as a preference only because a scene value is `nil` in the scene that does not
+    /// have one. The card side is the standard find bar over its body surface
+    /// (`CardBodyPresentation.findInText`); the board side focuses the search field.
+    private var findInText: (() -> Void)? { cardBody?.findInText }
 
     var body: some View {
         Button("Find") {
-            search?.focusField?()
+            if let findInText {
+                findInText()
+            } else {
+                search?.focusField?()
+            }
         }
         .keyboardShortcut("f", modifiers: .command)
-        .disabled(store == nil || search?.focusField == nil)
+        .disabled(findInText == nil && (store == nil || search?.focusField == nil))
     }
 }