Fix SwiftData migration crash on schema upgrades

Add = false/true defaults to all non-optional Bool properties so
SwiftData's lightweight migration knows what value to assign existing
rows. Replace try! ModelContainer with crash-safe do-catch that resets
the store on migration failure instead of crashing.

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

MealMood/Models/AppSettings.swift

@@ -4,11 +4,11 @@ import SwiftData
 @Model
 final class AppSettings {
     var mealWindows: String // "dinnerOnly", "lunchOnly", "both"
-    var includeWeekends: Bool
+    var includeWeekends: Bool = true
     var language: String // "spanish", "english"
 
     var calendarId: String?
-    var syncEnabled: Bool
+    var syncEnabled: Bool = false
     var syncMode: String? // "weekComplete", "manual"
     var lunchTime: Date
     var dinnerTime: Date
@@ -18,8 +18,8 @@ final class AppSettings {
     var iCloudSyncEnabled: Bool?
     var weekExportStyle: String?
 
-    var isPremium: Bool
-    var onboardingCompleted: Bool
+    var isPremium: Bool = false
+    var onboardingCompleted: Bool = false
 
     init() {
         self.mealWindows = "dinnerOnly"

MealMood/Models/Dish.swift

@@ -8,7 +8,7 @@ final class Dish {
     var descriptionText: String?
     var tagIds: [UUID]
     var createdAt: Date
-    var isPriority: Bool
+    var isPriority: Bool = false
 
     init(
         id: UUID = UUID(),

MealMood/Models/MealSlot.swift

@@ -8,8 +8,8 @@ final class MealSlot {
     var mealType: String // "lunch", "dinner"
     var dishId: UUID?
     var calendarEventId: String?
-    var isRuleOverridden: Bool
-    var isEatingOut: Bool
+    var isRuleOverridden: Bool = false
+    var isEatingOut: Bool = false
 
     var weekPlan: WeekPlan?
 

MealMood/Models/Tag.swift

@@ -8,11 +8,11 @@ final class Tag {
     var nameEN: String
     var color: String
     var maxPerWeek: Int?
-    var noConsecutive: Bool
-    var noDuplicateInDay: Bool
+    var noConsecutive: Bool = false
+    var noDuplicateInDay: Bool = false
     var mealTypeRestriction: String? // "lunch", "dinner", nil
     var dayRestriction: String? // nil = any day, "weekdays" = Mon-Fri, "weekend" = Sat-Sun
-    var isDefault: Bool
+    var isDefault: Bool = true
     var sortOrder: Int
 
     init(