Fix dish deletion list flicker with stable identity/order and add regression test

MealMood/Models/Dish.swift

@@ -23,3 +23,14 @@ final class Dish {
         self.createdAt = createdAt
     }
 }
+
+extension Dish {
+    static func stableSortedForDisplay(_ dishes: [Dish]) -> [Dish] {
+        dishes.sorted { lhs, rhs in
+            if lhs.createdAt != rhs.createdAt {
+                return lhs.createdAt > rhs.createdAt
+            }
+            return lhs.id.uuidString < rhs.id.uuidString
+        }
+    }
+}

MealMood/Views/Dishes/DishListView.swift

@@ -32,7 +32,7 @@ struct DishListView: View {
                 }
             } else {
                 List {
-                    ForEach(dishes) { dish in
+                    ForEach(dishes, id: \.id) { dish in
                         let dishTags = tags.filter { dish.tagIds.contains($0.id) }
                         Button {
                             editingDish = dish

MealMood/Views/Home/DishDrawerView.swift

@@ -15,7 +15,7 @@ struct DishDrawerView: View {
     
     private var filteredDishes: [Dish] {
         let term = searchText.trimmingCharacters(in: .whitespacesAndNewlines)
-        return dishes.filter { dish in
+        return Dish.stableSortedForDisplay(dishes).filter { dish in
             let matchesSearch = term.isEmpty || dish.name.localizedCaseInsensitiveContains(term)
             let matchesUsedFilter = !hideUsedThisWeek || !usedDishIds.contains(dish.id)
             return matchesSearch && matchesUsedFilter
@@ -95,7 +95,7 @@ struct DishDrawerView: View {
                 .buttonStyle(.plain)
 
                 LazyVStack(spacing: 8) {
-                    ForEach(filteredDishes) { dish in
+                    ForEach(filteredDishes, id: \.id) { dish in
                         DishCardView(
                             dish: dish,
                             tags: tags,

MealMood/Views/Home/HomeView.swift

@@ -5,7 +5,7 @@ struct HomeView: View {
     @Environment(\.horizontalSizeClass) private var horizontalSizeClass
     @Environment(\.modelContext) private var context
     @Environment(\.openURL) private var openURL
-    @Query private var dishes: [Dish]
+    @Query(sort: \Dish.createdAt, order: .reverse) private var dishes: [Dish]
     @Query private var tags: [Tag]
     @Query(sort: \WeekPlan.weekStartDate, order: .forward) private var weekPlans: [WeekPlan]
     @Query private var allSettings: [AppSettings]
@@ -452,7 +452,7 @@ struct HomeView: View {
                         .padding(24)
                     } else {
                         List {
-                            ForEach(filteredDishes) { dish in
+                            ForEach(filteredDishes, id: \.id) { dish in
                                 Button {
                                     onPickDish(dish)
                                     dismiss()

MealMoodTests/AutocompleteEngineTests.swift

@@ -59,5 +59,17 @@ final class AutocompleteEngineTests: XCTestCase {
         XCTAssertEqual(result.unfilledCount, 1)
         XCTAssertNil(tuesdayDinner.dishId)
     }
-}
 
+    func testDishStableSortRemainsConsistentAfterDeletion() {
+        let base = Date()
+        let oldest = Dish(id: UUID(uuidString: "00000000-0000-0000-0000-000000000001")!, name: "Old", createdAt: base.addingTimeInterval(-60))
+        let newest = Dish(id: UUID(uuidString: "00000000-0000-0000-0000-000000000002")!, name: "New", createdAt: base)
+        let middle = Dish(id: UUID(uuidString: "00000000-0000-0000-0000-000000000003")!, name: "Middle", createdAt: base.addingTimeInterval(-30))
+
+        let initial = Dish.stableSortedForDisplay([oldest, newest, middle]).map(\.id)
+        XCTAssertEqual(initial, [newest.id, middle.id, oldest.id])
+
+        let afterDeletion = Dish.stableSortedForDisplay([newest, oldest]).map(\.id)
+        XCTAssertEqual(afterDeletion, [newest.id, oldest.id])
+    }
+}