fix(planner): exclude current recipe from swap suggestions

Adds excludeRecipeId prop to SwapSuggestionList so the meal being
replaced is not offered as a swap candidate.

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

frontend/src/routes/(app)/planner/+page.svelte

@@ -309,6 +309,7 @@
 				replacingMeta={replacingMeta || undefined}
 				recipes={sortedRecipes}
 				{currentWeekRecipeIds}
+				excludeRecipeId={selectedSlot.recipe?.id}
 				isLoading={swapLoading}
 				onpick={handleSwapPick}
 				oncancel={() => (swapSheetOpen = false)}
@@ -549,6 +550,7 @@
 							replacingMeta={replacingMeta || undefined}
 							recipes={sortedRecipes}
 							{currentWeekRecipeIds}
+							excludeRecipeId={pickerSlot.recipe.id}
 							onpick={handleRecipePick}
 						/>
 					</div>