iOS: 'Anlegen & fertig' fuers Einzelstueck + Speichern-Nachfrage beim Zurueck

1) Im Einzelstueck-Anlegen gibt es jetzt 'Anlegen & fertig' - das schliesst in einem Tap bis zur Produktliste zurueck (statt Sheet schliessen + nochmal zurueck). 'Anlegen' bleibt fuer mehrere Stuecke nacheinander. 2) Beim Zurueck aus der Produkt-Detailansicht wird bei ungespeicherten Stammdaten-Aenderungen nachgefragt (Speichern/Verwerfen); ohne Aenderung direkt zurueck. Fussnote stellt klar: Foto und Lagerort-Bedarf speichern sofort.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

ios/Sources/ItemViews.swift

@@ -76,6 +76,8 @@ struct DateRow: View {
 struct ProductItemsSection: View {
     let product: Product
     var onChanged: () async -> Void
+    /// Bis zur Liste schließen (für „Anlegen & fertig").
+    var onFinish: (() -> Void)? = nil
 
     @State private var items: [Item] = []
     @State private var showAdd = false
@@ -102,7 +104,8 @@ struct ProductItemsSection: View {
         .task(id: product.id) { await reload() }
         .sheet(isPresented: $showAdd) {
             NavigationStack {
-                ItemAddSheet(productId: product.id) { await refresh() }
+                ItemAddSheet(productId: product.id, onDone: { await refresh() },
+                             onFinish: onFinish.map { finish in { showAdd = false; finish() } })
             }
         }
     }
@@ -436,6 +439,8 @@ struct ItemEditView: View {
 struct ItemAddSheet: View {
     let productId: Int
     var onDone: () async -> Void
+    /// Wenn gesetzt: „Anlegen & fertig" schließt bis zur Liste (nicht nur das Sheet).
+    var onFinish: (() -> Void)? = nil
 
     @Environment(\.dismiss) private var dismiss
 
@@ -514,7 +519,11 @@ struct ItemAddSheet: View {
 
             if let error { Section { Text(error).foregroundStyle(.red).font(.callout) } }
             Section {
-                Button(busy ? "Anlegen…" : "Anlegen") { Task { await create() } }.disabled(busy)
+                Button(busy ? "Anlegen…" : "Anlegen") { Task { await create(finish: false) } }.disabled(busy)
+                if onFinish != nil {
+                    Button(busy ? "Anlegen…" : "Anlegen & fertig") { Task { await create(finish: true) } }
+                        .disabled(busy)
+                }
             }
         }
         .navigationTitle("Einzelstücke anlegen")
@@ -575,7 +584,7 @@ struct ItemAddSheet: View {
                                 : "Übernommen: \(teile.joined(separator: ", "))."
     }
 
-    private func create() async {
+    private func create(finish: Bool) async {
         busy = true; defer { busy = false }; error = nil
         do {
             var sid = shopId
@@ -598,7 +607,7 @@ struct ItemAddSheet: View {
                     filename: docName.isEmpty ? "beleg" : docName, contentType: docType)
             }
             await onDone()
-            dismiss()
+            if finish, let onFinish { onFinish() } else { dismiss() }
         } catch { self.error = error.localizedDescription }
     }
 }

ios/Sources/ProductDetailView.swift

@@ -5,8 +5,10 @@ struct ProductDetailView: View {
     let product: Product
 
     @EnvironmentObject private var display: DisplaySettings
+    @Environment(\.dismiss) private var dismiss
 
     @State private var current: Product
+    @State private var showLeaveConfirm = false
     @State private var lots: [Lot] = []
     @State private var busy = false
     @State private var error: String?
@@ -40,6 +42,29 @@ struct ProductDetailView: View {
         _current = State(initialValue: product)
     }
 
+    /// Ungespeicherte Änderungen an den Artikel-Stammdaten? (Foto und Lagerort-
+    /// Bedarf speichern sofort und zählen hier nicht.)
+    private var isDirty: Bool {
+        if name != current.name { return true }
+        if brand != (current.brand ?? "") { return true }
+        if categoryId != current.categoryId { return true }
+        if current.isObject {
+            if !current.isIndividual, shopId != current.shopId { return true }
+            if productUrl != (current.productUrl ?? "") { return true }
+            if fieldValues != Self.stringValues(current.fieldValues) { return true }
+        } else {
+            if packageSize != (current.packageSize.map { formatAmount($0) } ?? "") { return true }
+            if packageLabel != (current.packageLabel ?? "") { return true }
+            if datePrecision != (current.datePrecision == "month" ? "month" : "day") { return true }
+            if groupId != current.groupId { return true }
+        }
+        return false
+    }
+
+    private func attemptLeave() {
+        if isDirty { showLeaveConfirm = true } else { dismiss() }
+    }
+
     var body: some View {
         Form {
             if let status {
@@ -52,7 +77,8 @@ struct ProductDetailView: View {
             ProductPhotoSection(productId: current.id)
 
             if current.isObject && current.isIndividual {
-                ProductItemsSection(product: current, onChanged: { await reload() })
+                ProductItemsSection(product: current, onChanged: { await reload() },
+                                    onFinish: { dismiss() })
             } else if current.isObject {
                 ObjectStockSection(product: current, locations: locations, lots: lots,
                                    onChanged: { await reload() })
@@ -193,6 +219,21 @@ struct ProductDetailView: View {
         }
         .navigationTitle(current.name)
         .navigationBarTitleDisplayMode(.inline)
+        .navigationBarBackButtonHidden(true)
+        .toolbar {
+            ToolbarItem(placement: .topBarLeading) {
+                Button { attemptLeave() } label: { Label("Zurück", systemImage: "chevron.left") }
+            }
+        }
+        .confirmationDialog("Ungespeicherte Änderungen", isPresented: $showLeaveConfirm,
+                            titleVisibility: .visible) {
+            Button("Speichern") { Task { await save(); dismiss() } }
+            Button("Verwerfen", role: .destructive) { dismiss() }
+            Button("Abbrechen", role: .cancel) {}
+        } message: {
+            Text("Änderungen an Name/Marke/Kategorie sind noch nicht gespeichert. "
+                 + "Foto und Lagerort-Bedarf werden sofort gespeichert.")
+        }
         .sheet(item: $editLot) { lot in
             NavigationStack {
                 LotEditView(lot: lot, product: current) {