Share schedule-editing and starter-seed-state helpers across platforms

Workouts/Views/Library/StarterGalleryView.swift

@@ -8,31 +8,6 @@
 import SwiftUI
 import SwiftData
 
-/// Where a bundled seed currently stands relative to the live cache — computed fresh
-/// from `@Query` routines on every render so a local edit, a remote change, or a
-/// fork-on-edit clone is reflected immediately. Shared by the gallery list and the
-/// preview screen so both classify a seed identically.
-enum StarterSeedState {
-    /// A live routine with the seed's fixed id exists — the starter is already in the
-    /// user's library (possibly since edited elsewhere; the id itself only forks at
-    /// edit time, so "added" still matches a pristine seed).
-    case added(Routine)
-    /// Not added, but some *other* live routine already carries the seed's name —
-    /// restoring would read as a confusing duplicate, so the add action is blocked.
-    case nameTaken
-    /// Neither added nor blocked — free to restore.
-    case restorable
-}
-
-extension SeedLibrary.Seed {
-    /// Classify this seed against the live routine set. See `StarterSeedState`.
-    func state(among routines: [Routine]) -> StarterSeedState {
-        if let live = routines.first(where: { $0.id == id }) { return .added(live) }
-        if routines.contains(where: { $0.name == doc.name }) { return .nameTaken }
-        return .restorable
-    }
-}
-
 /// Every bundled starter routine — including ones the user has deleted — with a
 /// per-seed Add/Restore action and a bulk "re-add everything missing" fallback. Unlike
 /// `RoutinesLibraryView` (which only ever shows *live* routines), this reads straight