watch: enviar la semana aunque todavia no este planificada

Faltaba la otra mitad del "no se actualiza": makePayload devolvia nil cuando la
semana en curso no tenia plan creado, asi que el iPhone no mandaba nada — ni
respondia cuando el reloj pedia datos — y el reloj se quedaba con el ultimo
snapshot, el del miercoles. Ahora la semana viaja igualmente, vacia, y el reloj
dice que no hay nada planificado en vez de enseñar lo de hace dias.

Ademas el reloj muestra cuando se actualizo por ultima vez. Sin eso, un
snapshot viejo y uno recien llegado se ven igual, y no hay forma de saber si
el problema es el envio o lo que se pinta.

Refs #34, #35

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013su1ttRiMeMYxkZJ1Y3246

MealMood/Resources/de.lproj/Localizable.strings

@@ -483,3 +483,4 @@
 "watch_empty_meal" = "Nicht geplant";
 "watch_empty_day" = "Für heute ist nichts geplant";
 "watch_stale" = "Öffne MealMood auf dem iPhone, um diese Woche zu sehen";
+"watch_updated" = "Aktualisiert";

MealMood/Resources/en.lproj/Localizable.strings

@@ -483,3 +483,4 @@
 "watch_empty_meal" = "Not planned";
 "watch_empty_day" = "Nothing planned for today";
 "watch_stale" = "Open MealMood on your iPhone to see this week";
+"watch_updated" = "Updated";

MealMood/Resources/es.lproj/Localizable.strings

@@ -483,3 +483,4 @@
 "watch_empty_meal" = "Sin planificar";
 "watch_empty_day" = "Hoy no hay nada planificado";
 "watch_stale" = "Abre MealMood en el iPhone para ver esta semana";
+"watch_updated" = "Actualizado";

MealMood/Resources/fr.lproj/Localizable.strings

@@ -483,3 +483,4 @@
 "watch_empty_meal" = "Non planifié";
 "watch_empty_day" = "Rien de prévu aujourd'hui";
 "watch_stale" = "Ouvrez MealMood sur l'iPhone pour voir cette semaine";
+"watch_updated" = "Mis à jour";

MealMood/Resources/it.lproj/Localizable.strings

@@ -483,3 +483,4 @@
 "watch_empty_meal" = "Non pianificato";
 "watch_empty_day" = "Oggi non c'è niente di pianificato";
 "watch_stale" = "Apri MealMood sull'iPhone per vedere questa settimana";
+"watch_updated" = "Aggiornato";

MealMood/Resources/pt-BR.lproj/Localizable.strings

@@ -483,3 +483,4 @@
 "watch_empty_meal" = "Sem planejamento";
 "watch_empty_day" = "Nada planejado para hoje";
 "watch_stale" = "Abra o MealMood no iPhone para ver esta semana";
+"watch_updated" = "Atualizado";

MealMood/Services/WatchSyncService.swift

@@ -46,7 +46,8 @@ final class WatchSyncService: NSObject, WCSessionDelegate, @unchecked Sendable {
         let descriptor = FetchDescriptor<WeekPlan>(
             predicate: #Predicate<WeekPlan> { plan in plan.weekStartDate == weekStart }
         )
-        guard let plan = try? context.fetch(descriptor).first else { return nil }
+        // No plan for this week yet? Answer with the empty week anyway.
+        let plan = try? context.fetch(descriptor).first
         let dishes = (try? context.fetch(FetchDescriptor<Dish>())) ?? []
 
         return Self.makePayload(plan: plan, dishes: dishes, settings: settings)?.encoded()
@@ -67,8 +68,13 @@ final class WatchSyncService: NSObject, WCSessionDelegate, @unchecked Sendable {
         try? WCSession.default.updateApplicationContext([WatchWeekPayload.storageKey: data])
     }
 
+    /// Builds the snapshot for a week. A missing plan is NOT a reason to stay
+    /// quiet: without this the watch keeps whatever it had — which is how it
+    /// went on showing Wednesday's dinner on Saturday. An empty week travels
+    /// too, and the watch says there's nothing planned.
     static func makePayload(plan: WeekPlan?, dishes: [Dish], settings: AppSettings) -> WatchWeekPayload? {
-        guard let plan else { return nil }
+        let weekStart = plan?.weekStartDate ?? Date().startOfWeek()
+        let slots = plan?.slotList ?? []
         let locale = Locale(identifier: settings.languageEnum.resolved().localeIdentifier)
         let dishById = Dictionary(dishes.map { ($0.id, $0) }, uniquingKeysWith: { first, _ in first })
         let dayFormatter = DateFormatter()
@@ -76,12 +82,12 @@ final class WatchSyncService: NSObject, WCSessionDelegate, @unchecked Sendable {
         dayFormatter.setLocalizedDateFormatFromTemplate("EEE d")
 
         let todayOffset = (Calendar.current.component(.weekday, from: Date()) + 5) % 7
-        let isCurrentWeek = plan.weekStartDate == Date().startOfWeek()
+        let isCurrentWeek = weekStart == Date().startOfWeek()
         let schedule = settings.schedule(for: plan)
 
         let days: [WatchWeekPayload.Day] = schedule.dayRange.map { day in
             let meals: [WatchWeekPayload.Meal] = schedule.mealTypes.map { meal in
-                let slot = plan.slotList.first { $0.dayOfWeek == day && $0.mealType == meal.rawValue }
+                let slot = slots.first { $0.dayOfWeek == day && $0.mealType == meal.rawValue }
                 let label = String(localized: String.LocalizationValue(meal.localizedKey))
                 var name: String?
                 if let slot {
@@ -98,7 +104,7 @@ final class WatchSyncService: NSObject, WCSessionDelegate, @unchecked Sendable {
                 }
                 return WatchWeekPayload.Meal(type: meal.rawValue, label: label, name: name)
             }
-            let dayDate = plan.weekStartDate.addingDays(day)
+            let dayDate = weekStart.addingDays(day)
             return WatchWeekPayload.Day(
                 dayOfWeek: day,
                 title: dayFormatter.string(from: dayDate).capitalized(with: locale),
@@ -111,12 +117,13 @@ final class WatchSyncService: NSObject, WCSessionDelegate, @unchecked Sendable {
         }
 
         return WatchWeekPayload(
-            weekTitle: plan.weekStartDate.formattedWeekRange(),
+            weekTitle: weekStart.formattedWeekRange(),
             days: days,
             updatedAt: Date(),
             emptyMealText: String(localized: "watch_empty_meal"),
             emptyDayText: String(localized: "watch_empty_day"),
-            staleText: String(localized: "watch_stale")
+            staleText: String(localized: "watch_stale"),
+            updatedLabel: String(localized: "watch_updated")
         )
     }
 

MealMood/Services/WatchWeekPayload.swift

@@ -56,6 +56,9 @@ struct WatchWeekPayload: Codable {
     var emptyMealText: String?
     var emptyDayText: String?
     var staleText: String?
+    /// "Updated" — shown next to `updatedAt` so it's visible at a glance when
+    /// the watch is holding an old snapshot.
+    var updatedLabel: String?
 
     static let appGroupID = "group.com.alexandrevazquez.mealmood"
     static let storageKey = "watch_week_payload_v1"

MealMoodTests/WatchWeekPayloadTests.swift

@@ -1,4 +1,5 @@
 import XCTest
+import SwiftData
 @testable import MealMood
 
 /// Regression suite for "the watch showed Wednesday's meal on Saturday".
@@ -153,6 +154,35 @@ final class WatchWeekPayloadTests: XCTestCase {
         XCTAssertTrue(payload.isStale(now: saturday, calendar: calendar))
     }
 
+
+    // MARK: - A week with no plan yet
+
+    @MainActor
+    func testWeekWithoutAPlanStillProducesASnapshot() throws {
+        // Staying quiet here is what left the watch showing the previous
+        // week: no plan meant no push at all, so the old snapshot survived.
+        let container = try ModelContainer(
+            for: AppSettings.self, Dish.self, Tag.self, WeekPlan.self, MealSlot.self, ShoppingItem.self,
+            configurations: ModelConfiguration(isStoredInMemoryOnly: true)
+        )
+        let context = ModelContext(container)
+        let settings = AppSettings()
+        settings.activeMealTypes = [.lunch, .dinner]
+        settings.includeWeekends = true
+        context.insert(settings)
+
+        let payload = try XCTUnwrap(
+            WatchSyncService.makePayload(plan: nil, dishes: [], settings: settings),
+            "a missing plan must still produce the current week"
+        )
+
+        XCTAssertEqual(payload.days.count, 7)
+        XCTAssertNotNil(payload.currentDay(), "today must be in there")
+        XCTAssertTrue(payload.currentDay()?.isEmpty ?? false, "and it must read as nothing planned")
+        XCTAssertFalse(payload.isStale(), "an empty current week is not stale")
+        _ = container
+    }
+
     func testWeekdayOffsetMapsMondayToZeroAndSundayToSix() {
         XCTAssertEqual(WatchWeekPayload.weekdayOffset(for: date(2026, 9, 7), calendar: calendar), 0)
         XCTAssertEqual(WatchWeekPayload.weekdayOffset(for: date(2026, 9, 12), calendar: calendar), 5)

MealMoodWatch/TodayView.swift

@@ -42,11 +42,34 @@ struct TodayView: View {
                 } else {
                     EmptySyncView()
                 }
+
+                // When the watch is holding an old snapshot, this is what makes
+                // it obvious instead of guessing why the meals look wrong.
+                if let payload = store.payload {
+                    LastUpdatedFooter(payload: payload)
+                }
             }
         }
     }
 }
 
+private struct LastUpdatedFooter: View {
+    let payload: WatchWeekPayload
+
+    var body: some View {
+        HStack(spacing: 3) {
+            Image(systemName: "arrow.clockwise")
+            // Label comes localized from the iPhone; the date formats itself
+            // with the watch's own locale.
+            Text("\(payload.updatedLabel ?? "") \(payload.updatedAt.formatted(date: .abbreviated, time: .shortened))")
+        }
+        .font(.system(size: 9, weight: .medium, design: .rounded))
+        .foregroundStyle(.secondary)
+        .frame(maxWidth: .infinity)
+        .padding(.top, 6)
+    }
+}
+
 struct MealCard: View {
     let meal: WatchWeekPayload.Meal
     /// Localized "nothing planned" coming from the iPhone — the watch bundle