feat: add bulk "add to collection" action on recipes page

Select recipes → add to an existing collection or create a new one inline. Fixes duplicate "visibility" i18n key bug found during verification.

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

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

@@ -1,6 +1,6 @@
 import { NextRequest, NextResponse } from "next/server";
 import { z } from "zod";
-import { db, collections, collectionRecipes, recipes, eq, and, or, ne } from "@epicure/db";
+import { db, collections, collectionRecipes, recipes, eq, and, or, ne, inArray } from "@epicure/db";
 import { requireSession } from "@/lib/api-auth";
 
 type Params = { params: Promise<{ id: string }> };
@@ -35,6 +35,7 @@ export async function PUT(req: NextRequest, { params }: Params) {
     description: z.string().max(500).optional(),
     isPublic: z.boolean().optional(),
     addRecipeId: z.string().optional(),
+    addRecipeIds: z.array(z.string()).max(200).optional(),
     removeRecipeId: z.string().optional(),
   }).safeParse(body);
   if (!parsed.success) return NextResponse.json({ error: "Validation error" }, { status: 400 });
@@ -49,15 +50,19 @@ export async function PUT(req: NextRequest, { params }: Params) {
     }).where(eq(collections.id, id));
   }
 
-  if (data.addRecipeId) {
-    const recipe = await db.query.recipes.findFirst({
+  const idsToAdd = [...(data.addRecipeId ? [data.addRecipeId] : []), ...(data.addRecipeIds ?? [])];
+  if (idsToAdd.length > 0) {
+    const owned = await db.query.recipes.findMany({
       where: and(
-        eq(recipes.id, data.addRecipeId),
+        inArray(recipes.id, idsToAdd),
         or(eq(recipes.authorId, session!.user.id), ne(recipes.visibility, "private"))
       ),
+      columns: { id: true },
     });
-    if (recipe) {
-      await db.insert(collectionRecipes).values({ collectionId: id, recipeId: data.addRecipeId }).onConflictDoNothing();
+    if (owned.length > 0) {
+      await db.insert(collectionRecipes)
+        .values(owned.map((r) => ({ collectionId: id, recipeId: r.id })))
+        .onConflictDoNothing();
     }
   }