The sort control leaves the list — three pickers settle into the bottom bar

Same segments, same persistence; the picker now rides each screen's
toolbar as a bottom-bar item shown only when there are rows to reorder,
instead of masquerading as the first row of the list it sorts.

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

KanbanMobile/Screens/BoardScreen.swift

@@ -5,7 +5,7 @@ import SwiftUI
 /// Holds only `boardRoot`, never a `BoardSummary`/`BoardModel` value: the session and its
 /// snapshot are pulled from the environment's index store fresh on every body evaluation, so a
 /// write from anywhere in the stack (a lane created, a card moved) reaches this screen the moment
-/// the session's reload lands. A segmented control above the lane rows lets the list be sorted by
+/// the session's reload lands. A segmented control in the toolbar lets the list be sorted by
 /// name or by most recent change, on top of the board's own manual arrangement, remembered across
 /// launches.
 struct BoardScreen: View {
@@ -39,6 +39,9 @@ struct BoardScreen: View {
                     }
                 }
             }
+            .toolbar {
+                sortToolbarItem
+            }
             .task { session.open() }
             .onDisappear {
                 // Stops the materializing/downloading retry timer. In practice a no-op here: a
@@ -73,6 +76,22 @@ struct BoardScreen: View {
         return title
     }
 
+    /// Shown only once there is something to sort — an empty or not-yet-loaded lane list has no
+    /// rows for the segments to reorder.
+    @ToolbarContentBuilder
+    private var sortToolbarItem: some ToolbarContent {
+        if case .ready = session.phase, let snapshot = session.snapshot, !snapshot.lanes.isEmpty {
+            ToolbarItem(placement: .bottomBar) {
+                Picker("Sort", selection: sortOrder) {
+                    Text("Manual").tag(ItemSortOrder.manual)
+                    Text("Name").tag(ItemSortOrder.name)
+                    Text("Recent").tag(ItemSortOrder.recent)
+                }
+                .pickerStyle(.segmented)
+            }
+        }
+    }
+
     @ViewBuilder
     private var content: some View {
         switch session.phase {
@@ -123,15 +142,6 @@ struct BoardScreen: View {
                     description: Text("Add a lane to start organizing cards.")
                 )
             } else {
-                Picker("Sort", selection: sortOrder) {
-                    Text("Manual").tag(ItemSortOrder.manual)
-                    Text("Name").tag(ItemSortOrder.name)
-                    Text("Recent").tag(ItemSortOrder.recent)
-                }
-                .pickerStyle(.segmented)
-                .listRowBackground(Color.clear)
-                .listRowSeparator(.hidden)
-
                 // The trusted order is `.manual`'s base — `BoardModel.lanes` is already in display
                 // order (the loader's `Ranks.sortedForDisplay`) — and `.name`/`.recent` layer a
                 // display-only re-sort on top, never touching that base or what's on disk.