2.0: fix crash de arranque por IDs duplicados (CloudKit)

Fatal error "Duplicate values for key" al construir diccionarios con
Dictionary(uniqueKeysWithValues:) sobre dishes/tags/slots cuyos UUID se
duplican por la sincronización CloudKit de 2.0. Se sustituyen todas las
ocurrencias por Dictionary(_, uniquingKeysWith:) para tolerar duplicados
(se conserva el primero) en lugar de abortar. La app ya no crashea al
abrir con datos duplicados; la deduplicación real queda pendiente aparte.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01A3HaWmmtTQ1vdTERtSYU6p

MealMood/Views/Stats/StatsView.swift

@@ -181,7 +181,7 @@ struct StatsView: View {
 
     private var topDishes: [DishEntry] {
         let usage = dishUsage
-        let dishMap = Dictionary(uniqueKeysWithValues: allDishes.map { ($0.id, $0) })
+        let dishMap = Dictionary(allDishes.map { ($0.id, $0) }, uniquingKeysWith: { first, _ in first })
         return usage
             .compactMap { id, count in dishMap[id].map { DishEntry(dish: $0, count: count) } }
             .sorted { $0.count > $1.count }
@@ -192,8 +192,8 @@ struct StatsView: View {
     private struct TagEntry { let tag: Tag; let count: Int }
 
     private var tagUsage: [TagEntry] {
-        let dishMap = Dictionary(uniqueKeysWithValues: allDishes.map { ($0.id, $0) })
-        let tagMap = Dictionary(uniqueKeysWithValues: allTags.map { ($0.id, $0) })
+        let dishMap = Dictionary(allDishes.map { ($0.id, $0) }, uniquingKeysWith: { first, _ in first })
+        let tagMap = Dictionary(allTags.map { ($0.id, $0) }, uniquingKeysWith: { first, _ in first })
         var counts: [UUID: Int] = [:]
         for plan in weekPlans {
             for slot in plan.slotList {