fix(recipes): address B2 review — tags, sort, edit link, types, a11y, tests

- RecipeHero: render tag pills, min-h-[200px/240px], fix back link styling, remove font-[400]
- IngredientList: sort by sortOrder ascending
- StepList: aria-hidden on step circles
- types.ts: add Tag, Ingredient, Step, RecipeDetail shared types
- +page.svelte: add Edit link → /recipes/[id]/edit (desktop topbar)
- Tests: tag pills, sortOrder sort, edit link, image variant, 403-as-404 documented

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

frontend/src/lib/recipes/RecipeHero.test.ts

@@ -63,4 +63,25 @@ describe('RecipeHero', () => {
 		render(RecipeHero, { props: { recipe: baseRecipe } });
 		expect(screen.queryByRole('img')).not.toBeInTheDocument();
 	});
+
+	it('renders tag pills', () => {
+		render(RecipeHero, {
+			props: {
+				recipe: {
+					...baseRecipe,
+					tags: [
+						{ id: 't1', name: 'Pasta' },
+						{ id: 't2', name: 'Italienisch' }
+					]
+				}
+			}
+		});
+		expect(screen.getByText('Pasta')).toBeInTheDocument();
+		expect(screen.getByText('Italienisch')).toBeInTheDocument();
+	});
+
+	it('renders no tag pills when tags array is empty', () => {
+		render(RecipeHero, { props: { recipe: { ...baseRecipe, tags: [] } } });
+		expect(screen.queryByText('Pasta')).not.toBeInTheDocument();
+	});
 });