reglas: plato fijo por dia y comida (ej. tortilla los viernes de cena)

- Dish.fixedDayOfWeek/fixedMealType (opcionales, aditivos para CloudKit)
- Toggle + pickers de dia/comida en el formulario de plato
- AutocompleteEngine: pre-pasada que asigna los platos fijos a su hueco
  antes del bucle MRV, de modo que cuentan para el resto de reglas
- Evento analytics dish_fixed_slot_set; strings en 6 idiomas

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013H6bXqGX1ygwib1Dm3n3UG

MealMood/ViewModels/DishViewModel.swift

@@ -7,6 +7,9 @@ final class DishViewModel: ObservableObject {
     @Published var descriptionText: String = ""
     @Published var selectedTagIds: Set<UUID> = []
     @Published var isPriority: Bool = false
+    @Published var hasFixedSlot: Bool = false
+    @Published var fixedDayOfWeek: Int = 4 // Friday
+    @Published var fixedMealType: MealType = .dinner
     @Published var ingredients: [String] = []
     @Published var photoData: Data?
     @Published var isGeneratingIngredients: Bool = false
@@ -29,6 +32,13 @@ final class DishViewModel: ObservableObject {
         descriptionText = dish.descriptionText ?? ""
         selectedTagIds = Set(dish.tagIds)
         isPriority = dish.isPriority
+        if let day = dish.fixedDayOfWeek, let meal = dish.fixedMealType.flatMap(MealType.init) {
+            hasFixedSlot = true
+            fixedDayOfWeek = day
+            fixedMealType = meal
+        } else {
+            hasFixedSlot = false
+        }
         ingredients = dish.ingredients
         photoData = dish.photoData
     }
@@ -39,6 +49,9 @@ final class DishViewModel: ObservableObject {
         descriptionText = ""
         selectedTagIds = []
         isPriority = false
+        hasFixedSlot = false
+        fixedDayOfWeek = 4
+        fixedMealType = .dinner
         ingredients = []
         photoData = nil
     }
@@ -93,6 +106,8 @@ final class DishViewModel: ObservableObject {
             dish.descriptionText = descriptionText.isEmpty ? nil : descriptionText
             dish.tagIds = Array(selectedTagIds)
             dish.isPriority = isPriority
+            dish.fixedDayOfWeek = hasFixedSlot ? fixedDayOfWeek : nil
+            dish.fixedMealType = hasFixedSlot ? fixedMealType.rawValue : nil
             dish.ingredients = cleanIngredients
             dish.photoData = photoData
         } else {
@@ -102,11 +117,14 @@ final class DishViewModel: ObservableObject {
                 tagIds: Array(selectedTagIds),
                 isPriority: isPriority,
                 ingredients: cleanIngredients,
-                photoData: photoData
+                photoData: photoData,
+                fixedDayOfWeek: hasFixedSlot ? fixedDayOfWeek : nil,
+                fixedMealType: hasFixedSlot ? fixedMealType.rawValue : nil
             )
             context.insert(dish)
             AnalyticsService.logDishAdded(tagCount: selectedTagIds.count)
         }
+        if hasFixedSlot { AnalyticsService.logEvent("dish_fixed_slot_set") }
 
         try? context.save()
         reset()