fix(app): reuse cached releases on launch and product switch

macOSdbApp/Models/AppState.swift

@@ -275,11 +275,13 @@ final class AppState {
 
     // MARK: - Actions
 
-    func refresh() async {
+    /// Loads the current product's releases, reusing any cached data. Used on launch
+    /// and when switching products so a flip doesn't re-download the whole catalog —
+    /// the DataProvider caches are product-keyed and URLCache serves repeat launches.
+    func load() async {
         isLoading = true
         lastError = nil
         loadFailureMessage = nil
-        await dataProvider.clearCache()
 
         do {
             let fetched = try await dataProvider.fetchAllReleases(for: selectedProduct)
@@ -295,6 +297,13 @@ final class AppState {
         isLoading = false
     }
 
+    /// Discards cached data and reloads from the network. Backs the ⌘R Refresh
+    /// command so the user can pull in newly published releases.
+    func refresh() async {
+        await dataProvider.clearCache()
+        await load()
+    }
+
     /// Re-point the current selection/comparison at the freshly loaded instances so
     /// the detail panes don't keep rendering a stale snapshot (or a release that is
     /// no longer in the catalog) after a refresh.
@@ -319,7 +328,7 @@ final class AppState {
         }
         isComparing = false
         releases = []
-        Task { await refresh() }
+        Task { await load() }
     }
 
     func startCompare() {

macOSdbApp/Views/ContentView.swift

@@ -71,7 +71,7 @@ struct ContentView: View {
         }
         .task {
             if appState.releases.isEmpty {
-                await appState.refresh()
+                await appState.load()
             }
         }
     }