feat: mark recipe as cooked (multi-cook history + backdate) and enable auto-deduct pantry on cook (v0.75.0)

Adds a general-purpose "mark cooked" dialog for any recipe (not just batch-cook dishes), with a date picker for backdating and a pantry-deduct checkbox defaulted on. Also flips the previously dead-in-the-UI deductFromPantry flag to true for the existing batch-cook and meal-planner cook actions.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/app/api/v1/recipes/[id]/cooked/route.ts

@@ -10,6 +10,9 @@ const Schema = z.object({
   notes: z.string().max(2000).optional(),
   deductFromPantry: z.boolean().default(true),
   batchDishId: z.string().optional(),
+  /** ISO date (YYYY-MM-DD) or full datetime — lets a user log a past cook,
+   * not just "just now". Defaults to now when omitted. */
+  cookedAt: z.string().optional(),
 });
 
 export async function POST(req: NextRequest, { params }: Params) {
@@ -44,6 +47,8 @@ export async function POST(req: NextRequest, { params }: Params) {
     isFirstBatchCook = !priorCook;
   }
 
+  const cookedAt = data.cookedAt ? new Date(data.cookedAt) : new Date();
+
   await db.insert(cookingHistory).values({
     id: crypto.randomUUID(),
     userId,
@@ -51,7 +56,7 @@ export async function POST(req: NextRequest, { params }: Params) {
     batchDishId: data.batchDishId,
     servings: data.servings,
     notes: data.notes,
-    cookedAt: new Date(),
+    cookedAt: isNaN(cookedAt.getTime()) ? new Date() : cookedAt,
   });
 
   if (data.deductFromPantry && (!data.batchDishId || isFirstBatchCook)) {