iOS: Mindestbestand je Lagerort (Produkte) + Einkaufsliste je Ort

- Produkt-Detail: neuer Editor „Mindestbestand je Lagerort" (Zeilen: Lagerort +
  Menge in Artikeleinheiten), zusaetzlich zum Gesamt-Mindestbestand.
- Einkaufsliste: Abschnitte „Bedarf: <Lagerort>" mit Produkten und Gruppen, die
  am Ort unter dem dort hinterlegten Mindestbestand liegen.
- Models/Client: LocationMinStock(+In), LocationNeeds*, setProductLocationMinStock,
  shoppingByLocation; Product um location_min_stocks erweitert.
(Gruppen-Bedarf je Ort ist vorerst nur im Web pflegbar, wird aber in der iOS-
 Einkaufsliste mit angezeigt.)

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

ios/AppIcon.icon/Assets/stock-rotation.svg

@@ -0,0 +1 @@
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ios/AppIcon.icon/icon.json

@@ -35,6 +35,31 @@
   "groups" : [
     {
       "layers" : [
+        {
+          "fill-specializations" : [
+            {
+              "value" : {
+                "solid" : "display-p3:0.00000,0.00000,0.00000,1.00000"
+              }
+            },
+            {
+              "appearance" : "dark",
+              "value" : {
+                "solid" : "display-p3:0.58245,0.53181,0.88393,1.00000"
+              }
+            }
+          ],
+          "glass" : true,
+          "image-name" : "stock-rotation.svg",
+          "name" : "stock-rotation",
+          "position" : {
+            "scale" : 1.7,
+            "translation-in-points" : [
+              0,
+              0
+            ]
+          }
+        },
         {
           "fill-specializations" : [
             {
@@ -51,6 +76,7 @@
             }
           ],
           "glass" : false,
+          "hidden" : true,
           "image-name" : "barcode-gelesen.svg",
           "name" : "barcode-gelesen",
           "position" : {

ios/Sources/APIClient.swift

@@ -121,6 +121,13 @@ actor APIClient {
         return try await send(request, as: Product.self)
     }
 
+    /// Mindestbestände je Lagerort ersetzen (Menge in Artikeleinheiten).
+    func setProductLocationMinStock(id: Int, _ list: [LocationMinStockIn]) async throws -> Product {
+        var request = try makeRequest("/products/\(id)/location-min-stock", method: "PUT")
+        try jsonBody(&request, list)
+        return try await send(request, as: Product.self)
+    }
+
     /// Aktuelles Artikelfoto laden (mit Anmeldung). Gibt nil bei 404 zurück.
     func productImage(id: Int) async throws -> Data? {
         let request = try makeRequest("/products/\(id)/image")
@@ -244,6 +251,10 @@ actor APIClient {
         try await send(try makeRequest("/shopping-list/groups"), as: [GroupShoppingItem].self)
     }
 
+    func shoppingByLocation() async throws -> [LocationNeeds] {
+        try await send(try makeRequest("/shopping-list/by-location"), as: [LocationNeeds].self)
+    }
+
     func expiring(days: Int? = nil) async throws -> [ExpiringItem] {
         let path = days.map { "/expiring?days=\($0)" } ?? "/expiring"
         return try await send(try makeRequest(path), as: [ExpiringItem].self)

ios/Sources/ListViews.swift

@@ -50,6 +50,7 @@ struct ShoppingListView: View {
 
     @State private var items: [ShoppingItem] = []
     @State private var groups: [GroupShoppingItem] = []
+    @State private var byLocation: [LocationNeeds] = []
     @State private var busy = true
     @State private var error: String?
 
@@ -80,7 +81,25 @@ struct ShoppingListView: View {
                     }
                 }
             }
-            if items.isEmpty && groups.isEmpty && !busy {
+            ForEach(byLocation) { ort in
+                Section("Bedarf: \(ort.locationName)") {
+                    ForEach(ort.products) { p in
+                        ListRow(
+                            systemImage: "shippingbox",
+                            title: p.name,
+                            subtitle: "fehlt \(formatAmount(p.deficit)) \(p.unitLabel)"
+                        ) { EmptyView() }
+                    }
+                    ForEach(ort.groups) { g in
+                        ListRow(
+                            systemImage: "square.stack.3d.up",
+                            title: g.name,
+                            subtitle: "fehlt \(formatAmount(g.deficit)) \(g.unitName)"
+                        ) { GroupBadge() }
+                    }
+                }
+            }
+            if items.isEmpty && groups.isEmpty && byLocation.isEmpty && !busy {
                 Text("Nichts einzukaufen – alle Mindestbestände sind gedeckt.")
                     .foregroundStyle(.secondary)
             }
@@ -97,6 +116,7 @@ struct ShoppingListView: View {
         do {
             items = try await APIClient.shared.shoppingList()
             groups = try await APIClient.shared.shoppingGroups()
+            byLocation = try await APIClient.shared.shoppingByLocation()
             error = nil
         } catch {
             self.error = error.localizedDescription

ios/Sources/Models.swift

@@ -76,9 +76,12 @@ struct Product: Codable, Identifiable, Hashable {
     let fieldValues: [String: String?]?
     /// Gegenstand als Einzelstücke (Items mit UID/QR) statt als Menge geführt.
     let individual: Bool?
+    /// Mindestbestand je Lagerort (zusaetzlich zum globalen Mindestbestand).
+    let locationMinStocks: [LocationMinStock]?
 
     enum CodingKeys: String, CodingKey {
         case id, barcode, name, brand, stock, kind, barcodes, tracking, individual
+        case locationMinStocks = "location_min_stocks"
         case datePrecision = "date_precision"
         case categoryId = "category_id"
         case categoryName = "category_name"
@@ -129,6 +132,31 @@ struct Product: Codable, Identifiable, Hashable {
     }
 }
 
+/// Mindestbestand eines Produkts/einer Gruppe an einem Lagerort (Anzeige).
+struct LocationMinStock: Codable, Hashable, Identifiable {
+    let locationId: Int
+    let locationName: String?
+    let minStock: Double
+    var id: Int { locationId }
+
+    enum CodingKeys: String, CodingKey {
+        case minStock = "min_stock"
+        case locationId = "location_id"
+        case locationName = "location_name"
+    }
+}
+
+/// Ein Mindestbestand-Eintrag zum Speichern (Menge in Artikeleinheiten).
+struct LocationMinStockIn: Codable {
+    let locationId: Int
+    let minStock: Double
+
+    enum CodingKeys: String, CodingKey {
+        case minStock = "min_stock"
+        case locationId = "location_id"
+    }
+}
+
 /// Auswahleintrag fuer Einheiten.
 ///
 /// Anzeige und uebertragener Wert sind bewusst getrennt: Das Backend kennt
@@ -324,6 +352,59 @@ struct GroupShoppingItem: Codable, Identifiable {
     }
 }
 
+// MARK: - Bedarfe je Lagerort
+
+struct LocationNeedProduct: Codable, Identifiable {
+    let productId: Int
+    let name: String
+    let unitLabel: String
+    let stock: Double
+    let minStock: Double
+    let deficit: Double
+
+    var id: Int { productId }
+
+    enum CodingKeys: String, CodingKey {
+        case name, stock, deficit
+        case productId = "product_id"
+        case unitLabel = "unit_label"
+        case minStock = "min_stock"
+    }
+}
+
+struct LocationNeedGroup: Codable, Identifiable {
+    let groupId: Int
+    let name: String
+    let unitName: String
+    let stock: Double
+    let minStock: Double
+    let deficit: Double
+
+    var id: Int { groupId }
+
+    enum CodingKeys: String, CodingKey {
+        case name, stock, deficit
+        case groupId = "group_id"
+        case unitName = "unit_name"
+        case minStock = "min_stock"
+    }
+}
+
+struct LocationNeeds: Codable, Identifiable {
+    let locationId: Int
+    let locationName: String
+    let products: [LocationNeedProduct]
+    let groups: [LocationNeedGroup]
+
+    var id: Int { locationId }
+
+    enum CodingKeys: String, CodingKey {
+        case products, groups
+        case locationId = "location_id"
+        case locationName = "location_name"
+    }
+}
+
 struct ExpiringItem: Codable, Identifiable {
     let lotId: Int
     let productId: Int

ios/Sources/ProductDetailView.swift

@@ -132,6 +132,18 @@ struct ProductDetailView: View {
                 }
             }
 
+            Section {
+                NavigationLink {
+                    ProductLocationMinView(product: current) { await reload() }
+                } label: {
+                    let n = (current.locationMinStocks ?? []).count
+                    Label(n > 0 ? "Mindestbestand je Lagerort (\(n))" : "Mindestbestand je Lagerort",
+                          systemImage: "mappin.and.ellipse")
+                }
+            } footer: {
+                Text("Bedarf je Lagerort (z.B. Ferienhaus, Zuhause), zusätzlich zum Gesamt-Mindestbestand.")
+            }
+
             Section("Erkennung") {
                 LabeledContent("Barcode", value: current.barcode ?? "–")
                 if !current.barcodes.isEmpty {
@@ -399,3 +411,98 @@ struct LotEditView: View {
         }
     }
 }
+
+// MARK: - Mindestbestand je Lagerort
+
+/// Bedarf eines Produkts je Lagerort bearbeiten (zusätzlich zum globalen
+/// Mindestbestand). Menge in Artikeleinheiten.
+struct ProductLocationMinView: View {
+    let product: Product
+    var onChanged: (() async -> Void)? = nil
+
+    @Environment(\.dismiss) private var dismiss
+
+    private struct MinRow: Identifiable {
+        let id = UUID()
+        var locationId: Int?
+        var amount: String
+    }
+
+    @State private var locations: [StorageLocation] = []
+    @State private var rows: [MinRow] = []
+    @State private var busy = false
+    @State private var error: String?
+
+    var body: some View {
+        Form {
+            Section {
+                Text("Bedarf je Lagerort (z.B. Ferienhaus, Zuhause). Menge in \(product.articleUnitLabel).")
+                    .font(.caption).foregroundStyle(.secondary)
+            }
+            ForEach($rows) { $row in
+                HStack {
+                    Picker("Lagerort", selection: $row.locationId) {
+                        Text("– wählen –").tag(Int?.none)
+                        ForEach(locations) { l in Text(l.name).tag(Int?.some(l.id)) }
+                    }
+                    TextField("Menge", text: $row.amount)
+                        .keyboardType(.decimalPad)
+                        .multilineTextAlignment(.trailing)
+                        .frame(width: 70)
+                    Button(role: .destructive) {
+                        rows.removeAll { $0.id == row.id }
+                    } label: {
+                        Image(systemName: "trash")
+                    }
+                    .buttonStyle(.borderless)
+                }
+            }
+            Button {
+                rows.append(MinRow(locationId: nil, amount: ""))
+            } label: {
+                Label("Lagerort hinzufügen", systemImage: "plus")
+            }
+            if let error {
+                Section { Text(error).foregroundStyle(.red).font(.callout) }
+            }
+        }
+        .navigationTitle("Bedarf je Lagerort")
+        .navigationBarTitleDisplayMode(.inline)
+        .toolbar {
+            ToolbarItem(placement: .topBarTrailing) {
+                Button(busy ? "Speichern…" : "Speichern") { Task { await save() } }
+                    .disabled(busy)
+            }
+        }
+        .task { await load() }
+    }
+
+    private func load() async {
+        locations = (try? await APIClient.shared.locations()) ?? []
+        rows = (product.locationMinStocks ?? []).map {
+            MinRow(locationId: $0.locationId, amount: formatAmount($0.minStock))
+        }
+    }
+
+    private func save() async {
+        busy = true
+        defer { busy = false }
+        var list: [LocationMinStockIn] = []
+        var gesehen: Set<Int> = []
+        for row in rows {
+            guard let loc = row.locationId, !gesehen.contains(loc) else { continue }
+            let wert = Double(row.amount.replacingOccurrences(of: ",", with: ".")) ?? 0
+            if wert > 0 {
+                gesehen.insert(loc)
+                list.append(LocationMinStockIn(locationId: loc, minStock: wert))
+            }
+        }
+        do {
+            _ = try await APIClient.shared.setProductLocationMinStock(id: product.id, list)
+            await onChanged?()
+            dismiss()
+        } catch {
+            self.error = error.localizedDescription
+        }
+    }
+}