a11y: honor Reduce Motion for continuous animations

Gate continuously-running motion animations on @Environment(\.accessibilityReduceMotion)
so they stop or render statically when Reduce Motion is enabled:
- CircularProgressView: indeterminate spinner stops rotating (static arc).
- RadarSweepView: TimelineView sweep freezes (paused).
- PulsingCircle map halo: renders a static circle instead of breathing.
- Looping .variableColor symbol effects (Connect, WifiProvisioning, PositionPopover,
  AnimatedNodePin sensor pin) become isActive: !reduceMotion.

Opacity cross-fades (e.g. LEDIndicator packet flash) are intentionally left alone,
per Apple guidance that cross-fades are the recommended substitute for motion.

Author: bruschill

Meshtastic/Views/Nodes/Helpers/Map/MapContent/AnimatedNodePin.swift

@@ -73,13 +73,25 @@ struct AnimatedNodePin: View, Equatable {
 /// recycles/reconfigures the annotation view (which it does constantly on pan/zoom/declutter). The
 /// per-node `calculatedDelay` phase-shifts each node so they don't all pulse in unison.
 struct PulsingCircle: View {
+	@Environment(\.accessibilityReduceMotion) private var reduceMotion
 	let nodeColor: UIColor
 	let calculatedDelay: Double
 
 	/// Seconds for one full breath (out and back), matching the previous 1.2s-each-way feel.
 	private let period: Double = 2.4
 
 	var body: some View {
+		if reduceMotion {
+			// Static halo (no breathing) when Reduce Motion is enabled.
+			Circle()
+				.fill(Color(nodeColor.lighter()).opacity(0.3))
+				.frame(width: 50, height: 50)
+		} else {
+			animatedHalo
+		}
+	}
+
+	private var animatedHalo: some View {
 		// Cap the clock to ~20 fps: a slow 2.4s breath looks identical, but with many ONLINE pins each
 		// hosted in an MKAnnotationView, an uncapped `.animation` clock re-renders every pin every
 		// display frame and never lets the map go idle (janky at rest on Mac Catalyst).

Meshtastic/Views/Settings/Discovery/RadarSweepView.swift

@@ -11,6 +11,7 @@ import SwiftUI
 struct RadarSweepView: View {
 	var isActive: Bool
 
+	@Environment(\.accessibilityReduceMotion) private var reduceMotion
 	@State private var startDate = Date()
 
 	/// Seconds for one full 360° rotation
@@ -24,7 +25,8 @@ struct RadarSweepView: View {
 
 	var body: some View {
 		if isActive {
-			TimelineView(.animation(minimumInterval: 1.0 / 30.0)) { timeline in
+			// Freeze the sweep on a single static frame when Reduce Motion is enabled.
+			TimelineView(.animation(minimumInterval: 1.0 / 30.0, paused: reduceMotion)) { timeline in
 				let elapsed = timeline.date.timeIntervalSince(startDate)
 				let rotation = (elapsed / rotationDuration).truncatingRemainder(dividingBy: 1.0) * 360.0
 

Meshtastic/Views/Settings/Firmware/Helpers/CircularProgressView.swift

@@ -23,6 +23,7 @@ struct CircularProgressView: View {
 	var subtitleText: String?
 
 	@State private var rotation: Double = 0
+	@Environment(\.accessibilityReduceMotion) private var reduceMotion
 
 	private var isComplete: Bool {
 		// Complete only if 100%, not indeterminate, and NOT an error
@@ -71,11 +72,13 @@ struct CircularProgressView: View {
 		// Monitor both Indeterminate and Error to stop/start animations
 		.onChange(of: isIndeterminate) { _, _ in updateAnimationStatus() }
 		.onChange(of: isError) { _, _ in updateAnimationStatus() }
+		.onChange(of: reduceMotion) { _, _ in updateAnimationStatus() }
 	}
 
 	private func updateAnimationStatus() {
-		// Only spin if Indeterminate AND we are not in an Error state
-		if isIndeterminate && !isError {
+		// Only spin if Indeterminate AND we are not in an Error state. Respect Reduce Motion by
+		// leaving the indeterminate segment static instead of spinning it forever.
+		if isIndeterminate && !isError && !reduceMotion {
 			rotation = 0
 			withAnimation(.linear(duration: 2.0).repeatForever(autoreverses: false)) {
 				rotation = 360