1.0.6: Priority dishes, day rules, auto-assign CTA, tap-to-replace, export incomplete weeks, Sunday notification

- Dish.isPriority: mark dishes as priority; auto-assign gives them 2.5x weight
- Tag.dayRestriction: restrict tags to weekdays or weekend only
- Auto-assign CTA banner shown when there are empty slots (was hidden in context menu)
- Tap on filled slot opens picker to replace dish directly (no need to remove first)
- Export callout visible as soon as ≥1 slot is filled (not only when week is complete)
- WeekPlanShareView shows localized "TBD" / "Eating out" for empty/eating-out slots
- Second Sunday 17:00 push notification to plan next week
- DishDrawer sorts: priority first, then by historical usage, then alphabetically
- Search in SlotDishPickerSheet already shipped in 1.0.5 (verified ✓)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

MealMood/ViewModels/DishViewModel.swift

@@ -6,6 +6,7 @@ final class DishViewModel: ObservableObject {
     @Published var name: String = ""
     @Published var descriptionText: String = ""
     @Published var selectedTagIds: Set<UUID> = []
+    @Published var isPriority: Bool = false
     @Published var showTagSelector: Bool = false
     @Published var showDeleteAlert: Bool = false
     @Published var showAssignedDeleteAlert: Bool = false
@@ -23,6 +24,7 @@ final class DishViewModel: ObservableObject {
         name = dish.name
         descriptionText = dish.descriptionText ?? ""
         selectedTagIds = Set(dish.tagIds)
+        isPriority = dish.isPriority
     }
 
     func reset() {
@@ -30,6 +32,7 @@ final class DishViewModel: ObservableObject {
         name = ""
         descriptionText = ""
         selectedTagIds = []
+        isPriority = false
     }
 
     func save(context: ModelContext) {
@@ -40,11 +43,13 @@ final class DishViewModel: ObservableObject {
             dish.name = trimmedName
             dish.descriptionText = descriptionText.isEmpty ? nil : descriptionText
             dish.tagIds = Array(selectedTagIds)
+            dish.isPriority = isPriority
         } else {
             let dish = Dish(
                 name: trimmedName,
                 descriptionText: descriptionText.isEmpty ? nil : descriptionText,
-                tagIds: Array(selectedTagIds)
+                tagIds: Array(selectedTagIds),
+                isPriority: isPriority
             )
             context.insert(dish)
             AnalyticsService.logDishAdded(tagCount: selectedTagIds.count)