1.0.4: Smarter auto-assign, quick dish entry, calendar fix, frictionless onboarding

- AutocompleteEngine: no-repeat rule now applies to all dishes (not just tagless ones); fallback still allows repeats when no alternative exists
- CalendarService: update existing events instead of delete+create to prevent duplicates; fix weekStartDate using plan date instead of currentWeekStart
- DishFormView: form stays open after saving in create mode for quick multi-dish entry; Done button to close; saved feedback banner
- OnboardingViewModel/FirstDishesStepView: dishes are now optional during onboarding; Finish button always enabled
- AnalyticsService: new events — onboarding_step_viewed(step) and auto_assign_used(filled, unfilled)
- Localization: dish_done and first_dishes_optional_hint added in 6 languages; release notes updated in all 6 languages
- Version bump: 1.0.3 → 1.0.4 (build 19)

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

MealMood/Services/CalendarService.swift

@@ -60,6 +60,50 @@ final class CalendarService {
         }
     }
 
+    func updateEvent(
+        eventId: String,
+        slot: MealSlot,
+        dishName: String,
+        dishDescription: String?,
+        weekStartDate: Date,
+        settings: AppSettings
+    ) -> String? {
+        guard let event = eventStore.event(withIdentifier: eventId) else {
+            // Event was deleted externally — create a fresh one
+            return createEvent(
+                slot: slot,
+                dishName: dishName,
+                dishDescription: dishDescription,
+                weekStartDate: weekStartDate,
+                settings: settings
+            )
+        }
+
+        let prefix = settings.eventPrefix.isEmpty ? "" : "\(settings.eventPrefix) "
+        let mealNameKey = slot.mealType == "lunch" ? "lunch" : "dinner"
+        let mealName = localizedString(mealNameKey, language: settings.languageEnum.resolved())
+        event.title = "\(prefix)\(mealName): \(dishName)"
+
+        let slotDate = weekStartDate.addingDays(slot.dayOfWeek)
+        let slotTime = slot.mealType == "lunch" ? settings.lunchTime : settings.dinnerTime
+        event.startDate = combineDateAndTime(date: slotDate, time: slotTime)
+        event.endDate = event.startDate.addingMinutes(settings.eventDuration)
+        event.notes = dishDescription
+
+        event.alarms?.forEach { event.removeAlarm($0) }
+        if let reminder = settings.reminderMinutesBefore {
+            event.addAlarm(EKAlarm(relativeOffset: -TimeInterval(reminder * 60)))
+        }
+
+        do {
+            try eventStore.save(event, span: .thisEvent)
+            return event.eventIdentifier
+        } catch {
+            print("Error updating event: \(error)")
+            return nil
+        }
+    }
+
     func deleteEvent(eventId: String) {
         guard let event = eventStore.event(withIdentifier: eventId) else { return }
         do {