Restructure into a three-tab app with Progress, goals, and Meditation

The UX redesign's first landing (spec in UX-REDESIGN.md): ContentView
becomes a Today / Progress / Settings TabView, "Routine" replaces
"Split" in every user-facing string and view name (code-level types
keep their names), and workout starting moves to shared
WorkoutStarter / StartedWorkoutNavigator plumbing.

- New Progress tab: weekly goal streaks, workout trends, per-exercise
  weight progression, achievements, and the full history list
  (WorkoutLogsView -> WorkoutHistoryView).
- Goals: stable categories workouts roll up to, managed from Settings.
- New Meditation exercise + starter routine; timed sits record to
  Apple Health as Mind & Body sessions.

Claude-Session: https://claude.ai/code/session_012qw2itfzKyEJ1HpsFt8Ex4

Workouts/Views/Settings/SettingsView.swift

@@ -15,7 +15,7 @@ struct SettingsView: View {
     @Environment(SyncEngine.self) private var sync
     @Environment(AppServices.self) private var services
 
-    @Query private var splits: [Split]
+    @Query private var routines: [Routine]
 
     @AppStorage("restSeconds") private var restSeconds: Int = 45
     @AppStorage("doneCountdownSeconds") private var doneCountdownSeconds: Int = 5
@@ -78,12 +78,23 @@ struct SettingsView: View {
                 // MARK: - Library Section
                 Section(header: Text("Library")) {
                     NavigationLink {
-                        SplitListView()
+                        GoalsListView()
                     } label: {
                         HStack {
-                            Label("Splits", systemImage: "dumbbell.fill")
+                            Label("Goals", systemImage: "target")
                             Spacer()
-                            Text("\(splits.count)")
+                            Text("\(GoalKind.allCases.count)")
+                                .foregroundStyle(.secondary)
+                        }
+                    }
+
+                    NavigationLink {
+                        RoutineListView()
+                    } label: {
+                        HStack {
+                            Label("Routines", systemImage: "dumbbell.fill")
+                            Spacer()
+                            Text("\(routines.count)")
                                 .foregroundStyle(.secondary)
                         }
                     }
@@ -100,7 +111,7 @@ struct SettingsView: View {
                     }
                 }
 
-                // MARK: - Starter Splits Section
+                // MARK: - Starter Routines Section
                 Section {
                     Button {
                         Task {
@@ -109,12 +120,12 @@ struct SettingsView: View {
                             let n = await sync.restoreSeeds()
                             isRestoringSeeds = false
                             restoreSeedsMessage = n == 0
-                                ? "All starter splits are already present."
-                                : "Restored \(n) starter split\(n == 1 ? "" : "s")."
+                                ? "All starter routines are already present."
+                                : "Restored \(n) starter routine\(n == 1 ? "" : "s")."
                         }
                     } label: {
                         HStack {
-                            Label("Restore Starter Splits", systemImage: "arrow.counterclockwise")
+                            Label("Restore Starter Routines", systemImage: "arrow.counterclockwise")
                             if isRestoringSeeds {
                                 Spacer()
                                 ProgressView()
@@ -123,12 +134,12 @@ struct SettingsView: View {
                     }
                     .disabled(isRestoringSeeds || sync.iCloudStatus != .available)
                 } header: {
-                    Text("Starter Splits")
+                    Text("Starter Routines")
                 } footer: {
                     if let restoreSeedsMessage {
                         Text(restoreSeedsMessage)
                     } else {
-                        Text("Brings back the bundled starter splits you've deleted. Splits you've edited or created are never touched.")
+                        Text("Brings back the bundled starter routines you've deleted. Routines you've edited or created are never touched.")
                     }
                 }