iOS: Kaufpreis + Belege am Einzelstück

ItemEditView bekommt einen Kaufpreis (Betrag + CHF/EUR) und eine Beleg-Sektion:
Rechnung/Garantieschein als Bild (Fotoauswahl) oder PDF (Datei-Import)
hochladen, ansehen (QuickLook) und loeschen. Nach einem PDF-Upload schlaegt der
Server "Garantie bis" und Kaufpreis vor – per Knopf uebernehmbar. Item-Model um
priceCents/currency/documents erweitert; Client-Methoden fuer Upload, Download
und Loeschen der Belege.

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

ios/Sources/Models.swift

@@ -583,6 +583,19 @@ enum RemovalReasons {
 
 // MARK: - Einzelstücke (Items mit UID/QR)
 
+struct ItemDocument: Codable, Identifiable, Hashable {
+    let id: Int
+    let filename: String
+    let contentType: String
+    let uploadedAt: String
+
+    enum CodingKeys: String, CodingKey {
+        case id, filename
+        case contentType = "content_type"
+        case uploadedAt = "uploaded_at"
+    }
+}
+
 struct Item: Codable, Identifiable, Hashable {
     let id: Int
     let uid: String
@@ -594,12 +607,15 @@ struct Item: Codable, Identifiable, Hashable {
     let acquiredOn: String?      // "yyyy-MM-dd"
     let warrantyUntil: String?
     let note: String?
+    let priceCents: Int?
+    let currency: String?
     let createdAt: String
     let productName: String?
     let productBrand: String?
+    let documents: [ItemDocument]
 
     enum CodingKeys: String, CodingKey {
-        case id, uid, note
+        case id, uid, note, currency, documents
         case productId = "product_id"
         case locationId = "location_id"
         case locationName = "location_name"
@@ -607,12 +623,26 @@ struct Item: Codable, Identifiable, Hashable {
         case shopName = "shop_name"
         case acquiredOn = "acquired_on"
         case warrantyUntil = "warranty_until"
+        case priceCents = "price_cents"
         case createdAt = "created_at"
         case productName = "product_name"
         case productBrand = "product_brand"
     }
 }
 
+/// Antwort nach dem Beleg-Upload – mit den aus dem PDF geschätzten Werten.
+struct ItemDocumentUpload: Codable {
+    let id: Int
+    let suggestedWarrantyUntil: String?
+    let suggestedPriceCents: Int?
+
+    enum CodingKeys: String, CodingKey {
+        case id
+        case suggestedWarrantyUntil = "suggested_warranty_until"
+        case suggestedPriceCents = "suggested_price_cents"
+    }
+}
+
 struct ItemCreateRequest: Codable {
     let count: Int
     let locationId: Int?
@@ -636,13 +666,16 @@ struct ItemUpdateRequest: Encodable {
     var acquiredOn: String?
     var warrantyUntil: String?
     var note: String?
+    var priceCents: Int?
+    var currency: String?
 
     enum CodingKeys: String, CodingKey {
-        case note
+        case note, currency
         case locationId = "location_id"
         case shopId = "shop_id"
         case acquiredOn = "acquired_on"
         case warrantyUntil = "warranty_until"
+        case priceCents = "price_cents"
     }
 
     // Immer alle Felder senden (auch null), damit sich ein Feld leeren lässt.
@@ -653,6 +686,8 @@ struct ItemUpdateRequest: Encodable {
         try c.encode(acquiredOn, forKey: .acquiredOn)
         try c.encode(warrantyUntil, forKey: .warrantyUntil)
         try c.encode(note, forKey: .note)
+        try c.encode(priceCents, forKey: .priceCents)
+        try c.encode(currency, forKey: .currency)
     }
 }