Make live-run mirroring symmetric: phone-driven runs reach the watch

Two-way driving only worked watch->phone: the watch's navigated driver
broadcast and the phone auto-presented a follower cover. The reverse
failed on both ends — the phone's in-list ExerciseProgressView never
broadcast (only its cover did), and the watch had no surface to present
an incoming run.

- Wire the live channel into the phone's in-list driver (broadcast +
  follow) via a progressView(logID:) helper in WorkoutLogListView.
- Add a watch follower cover (LiveRunCoverView, mirroring the phone's),
  presented from ContentView when the phone drives a run the watch isn't
  already in; the watch bridge gains presentable / muteLive.
- Add a navigatedRunID guard on both sides so a device already in the run
  follows it inline rather than stacking a cover over itself.

Now starting or driving on either device surfaces the run on the other —
as a follower cover when idle, or inline when already in that run — and
either side can take over.

Claude-Session: https://claude.ai/code/session_01SCv7zvGFcKy47KSTnTLxRe

Workouts Watch App/Views/WorkoutLogListView.swift

@@ -95,6 +95,9 @@ struct WorkoutLogListView: View {
                 // Follow the phone when it drives this same run from its mirror.
                 incomingFrame: bridge.liveIncoming.flatMap { $0.logID == logID ? $0 : nil }
             )
+            // We're driving this run inline — suppress the follower cover for it.
+            .onAppear { bridge.navigatedRunID = logID }
+            .onDisappear { if bridge.navigatedRunID == logID { bridge.navigatedRunID = nil } }
         }
         .sheet(isPresented: $showingExercisePicker) {
             ExercisePickerView(exercises: availableExercises) { exercise in