The tab bar retires — boards are the app, settings behind the gear, recency the default order

The boards stack becomes the root screen: Settings moves from its own
tab to a sheet behind a leading gearshape button, the sort pickers trade
their text segments for symbols (hand.draw, textformat.abc, clock) with
the words kept for accessibility, and every list now opens sorted by
most recent change. UI tests re-aimed at the gear button and Done-button
scoping fixed for the sheet-over-sheet nav bars — 4/4 green in the
simulator.

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

KanbanMobile/Screens/SettingsScreen.swift

@@ -1,9 +1,11 @@
 import SwiftUI
 import IndieAbout
 
-/// The About section (indie-about skill).
-struct SettingsTabView: View {
+/// The About section (indie-about skill). Presented as a sheet from `BoardsTabView`'s gear
+/// button, so it carries its own navigation stack and a Done button to dismiss itself.
+struct SettingsScreen: View {
     @Environment(BoardIndexStore.self) private var index
+    @Environment(\.dismiss) private var dismiss
 
     var body: some View {
         NavigationStack {
@@ -19,9 +21,14 @@ struct SettingsTabView: View {
                 }
             }
             .navigationTitle("Settings")
+            .toolbar {
+                ToolbarItem(placement: .topBarTrailing) {
+                    Button("Done") { dismiss() }
+                }
+            }
         }
         // Idempotent (BoardIndexStore.start()), and harmless if BoardsTabView already called it —
-        // this tab can be the first one the user opens.
+        // defensive only, since the boards screen is always what starts the index now.
         .task { index.start() }
     }
 }