Add a starter routine gallery with per-seed restore

The Library tab's routines pane gains a "Browse Starter Routines" entry
opening a gallery of every bundled seed — kept or deleted — each showing
Added / name-taken / restorable state, a read-only plan preview, and a
one-tap Add that lifts the seed's delete veto. A "Re-add All Missing
Starters" fallback replaces the all-or-nothing Settings button, which is
removed. The delete confirmation now also warns how many scheduled days
would be left behind on the Today board.

Claude-Session: https://claude.ai/code/session_01H8VxUX4ckjU3vRF5M4L5FV

Workouts/Views/Settings/SettingsView.swift

@@ -22,9 +22,6 @@ struct SettingsView: View {
     @AppStorage("spokenCueStyle") private var spokenCueStyle: SpokenCueStyle = .cues
     @AppStorage(SpeechSettings.voiceIdentifierKey) private var speechVoiceIdentifier = ""
 
-    @State private var isRestoringSeeds = false
-    @State private var restoreSeedsMessage: String?
-
     /// Installed English voices, best quality first. Loaded on appear (not per render) since
     /// `speechVoices()` is a touch heavy and the list only changes when the user downloads a
     /// voice in system settings — re-read on each appear catches a return from doing exactly that.
@@ -86,38 +83,6 @@ struct SettingsView: View {
                     }
                 }
 
-                // MARK: - Starter Routines Section
-                Section {
-                    Button {
-                        Task {
-                            isRestoringSeeds = true
-                            restoreSeedsMessage = nil
-                            let n = await sync.restoreSeeds()
-                            isRestoringSeeds = false
-                            restoreSeedsMessage = n == 0
-                                ? "All starter routines are already present."
-                                : "Restored \(n) starter routine\(n == 1 ? "" : "s")."
-                        }
-                    } label: {
-                        HStack {
-                            Label("Restore Starter Routines", systemImage: "arrow.counterclockwise")
-                            if isRestoringSeeds {
-                                Spacer()
-                                ProgressView()
-                            }
-                        }
-                    }
-                    .disabled(isRestoringSeeds || sync.iCloudStatus != .available)
-                } header: {
-                    Text("Starter Routines")
-                } footer: {
-                    if let restoreSeedsMessage {
-                        Text(restoreSeedsMessage)
-                    } else {
-                        Text("Brings back the bundled starter routines you've deleted. Routines you've edited or created are never touched.")
-                    }
-                }
-
                 // MARK: - iCloud Sync Section
                 Section {
                     switch sync.iCloudStatus {