Fix meal plan not populating on first login and add pull-to-refresh sync

Rewrite MealPlanSyncManager.performSync() (renamed from performInitialSync) to
discover _mealPlanAssignment metadata from all server recipes, not just locally-
known ones. On first sync all recipes are checked; on subsequent syncs only
recipes modified since lastMealPlanSyncDate are fetched (max 5 concurrent).

Trigger meal plan sync from pull-to-refresh on both the recipe and meal plan
tabs, and from the "Refresh all" toolbar button.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Nextcloud Cookbook iOS Client/Views/Tabs/MealPlanTabView.swift

@@ -73,6 +73,15 @@ struct MealPlanTabView: View {
                 }
             }
             .navigationTitle("Meal Plan")
+            .refreshable {
+                await appState.getCategories()
+                for category in appState.categories {
+                    await appState.getCategory(named: category.name, fetchMode: .preferServer)
+                }
+                if UserSettings.shared.mealPlanSyncEnabled {
+                    await mealPlan.syncManager?.performSync()
+                }
+            }
             .navigationDestination(for: Recipe.self) { recipe in
                 RecipeView(viewModel: RecipeView.ViewModel(recipe: recipe))
                     .environmentObject(appState)

Nextcloud Cookbook iOS Client/Views/Tabs/RecipeTabView.swift

@@ -286,6 +286,9 @@ struct RecipeTabView: View {
                 await appState.getCategory(named: category.name, fetchMode: .preferServer)
                 await appState.getCategoryImage(for: category.name)
             }
+            if UserSettings.shared.mealPlanSyncEnabled {
+                await mealPlan.syncManager?.performSync()
+            }
         }
     }
     
@@ -342,6 +345,7 @@ struct RecipeTabView: View {
 fileprivate struct RecipeTabViewToolBar: ToolbarContent {
     @EnvironmentObject var appState: AppState
     @EnvironmentObject var viewModel: RecipeTabView.ViewModel
+    @EnvironmentObject var mealPlan: MealPlanManager
 
     var body: some ToolbarContent {
         // Top left menu toolbar item
@@ -356,6 +360,9 @@ fileprivate struct RecipeTabViewToolBar: ToolbarContent {
                             await appState.getCategory(named: category.name, fetchMode: .preferServer)
                         }
                         await appState.updateAllRecipeDetails()
+                        if UserSettings.shared.mealPlanSyncEnabled {
+                            await mealPlan.syncManager?.performSync()
+                        }
                         viewModel.presentLoadingIndicator = false
                     }
                 } label: {