Redesign recipe creation and edit view with Form-based layout and URL import

Replace the single "+" button with a 2-option menu (Create New Recipe / Import
from URL) across RecipeTabView, RecipeListView, and AllRecipesListView. Add
ImportURLSheet for server-side recipe import with loading and error states.

Completely redesign edit mode to use a native Form layout with inline editing
for all sections (metadata, duration, ingredients, instructions, tools,
nutrition) instead of the previous sheet-based EditableListView approach. Move
delete action from edit toolbar to view mode context menu. Add recipe image
display to the edit form.

Refactor RecipeListView and AllRecipesListView to use closure-based callbacks
instead of Binding<Bool> for the create/import actions. Add preloadedRecipeDetail
support to RecipeView.ViewModel for imported recipes.

Add DE/ES/FR translations for all new UI strings.

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

Nextcloud Cookbook iOS Client/Views/Recipes/RecipeViewSections/RecipeMetadataSection.swift

@@ -87,6 +87,52 @@ struct RecipeMetadataSection: View {
     }
 }
 
+// MARK: - Recipe Edit Metadata Section (Form-based)
+
+struct RecipeEditMetadataSection: View {
+    @EnvironmentObject var appState: AppState
+    @ObservedObject var viewModel: RecipeView.ViewModel
+
+    var categories: [String] {
+        appState.categories.map { $0.name }
+    }
+
+    var body: some View {
+        Section("Details") {
+            Picker("Category", selection: $viewModel.observableRecipeDetail.recipeCategory) {
+                Text("None").tag("")
+                ForEach(categories, id: \.self) { item in
+                    Text(item).tag(item)
+                }
+            }
+            .pickerStyle(.menu)
+
+            Stepper("Servings: \(viewModel.observableRecipeDetail.recipeYield)", value: $viewModel.observableRecipeDetail.recipeYield, in: 1...99)
+
+            Button {
+                viewModel.presentKeywordSheet = true
+            } label: {
+                HStack {
+                    Text("Keywords")
+                        .foregroundStyle(.primary)
+                    Spacer()
+                    if viewModel.observableRecipeDetail.keywords.isEmpty {
+                        Text("None")
+                            .foregroundStyle(.secondary)
+                    } else {
+                        Text(viewModel.observableRecipeDetail.keywords.joined(separator: ", "))
+                            .foregroundStyle(.secondary)
+                            .lineLimit(1)
+                    }
+                    Image(systemName: "chevron.right")
+                        .font(.caption)
+                        .foregroundStyle(.secondary)
+                }
+            }
+        }
+    }
+}
+
 fileprivate struct PickerPopoverView<Item: Hashable & CustomStringConvertible, Collection: Sequence>: View where Collection.Element == Item {
     @Binding var isPresented: Bool
     @Binding var value: Item