Adjust rest time with a 1-second stepper instead of the wheel

The wheel row lands back on a Stepper (shared SecondsStepperRow), but
keeps the fine 1-second step; holding a stepper button auto-repeats
with acceleration, so the 10-180s range still traverses quickly.

Workouts/Views/Common/SecondsStepperRow.swift

@@ -0,0 +1,30 @@
+//
+// SecondsStepperRow.swift
+// Workouts
+//
+// Copyright 2026 Rouslan Zenetl. All Rights Reserved.
+//
+
+import SwiftUI
+
+/// A Form row for adjusting a seconds value with a stepper in 1-second steps —
+/// fine-grained (the old 5-second step overshot), and holding a stepper button
+/// auto-repeats with acceleration, so the 10–180s range still traverses quickly.
+/// Used for the rest-time settings in Settings and the routine editor.
+struct SecondsStepperRow: View {
+    let title: String
+    let range: ClosedRange<Int>
+    @Binding var seconds: Int
+
+    var body: some View {
+        Stepper(value: $seconds, in: range, step: 1) {
+            HStack {
+                Text(title)
+                Spacer()
+                Text("\(seconds)s")
+                    .monospacedDigit()
+                    .foregroundStyle(.secondary)
+            }
+        }
+    }
+}