security: widen API-key auth to content/AI routes (v0.27.0)

Convert requireSession -> requireSessionOrApiKey across recipes,
collections, meal-plans, shopping-lists, pantry, feed, and ai/*
(52 routes) so API keys work end-to-end, not just for the handful of
endpoints that supported them before. Scope was explicitly confirmed
per-resource-family with the user before any file was touched.

Left session-cookie-only, deliberately: users/me*, ai-keys/*,
webhooks/*, conversations/*, notifications/*, push/subscribe, admin/*
— account/credential-adjacent surface that shouldn't widen without a
separate, explicit decision.

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

apps/web/app/api/v1/meal-plans/shared/[mealPlanId]/entries/route.ts

@@ -1,7 +1,7 @@
 import { NextRequest, NextResponse } from "next/server";
 import { z } from "zod";
 import { db, mealPlanEntries, recipes, eq, and, or, ne, inArray } from "@epicure/db";
-import { requireSession } from "@/lib/api-auth";
+import { requireSessionOrApiKey } from "@/lib/api-auth";
 import { getMealPlanAccessById, canWriteMealPlan } from "@/lib/meal-plan-access";
 import { dispatchWebhook } from "@/lib/webhooks";
 
@@ -10,8 +10,8 @@ type Params = { params: Promise<{ mealPlanId: string }> };
 // Polled by SharedMealPlanView so every collaborator sees each other's
 // changes, and the plan owner's own tab (a different component/URL, per
 // meal-plans/[weekStart]/entries) picks up edits made from here too.
-export async function GET(_req: NextRequest, { params }: Params) {
-  const { session, response } = await requireSession();
+export async function GET(req: NextRequest, { params }: Params) {
+  const { session, response } = await requireSessionOrApiKey(req);
   if (response) return response;
   const { mealPlanId } = await params;
 
@@ -43,7 +43,7 @@ const Schema = z.object({
 });
 
 export async function POST(req: NextRequest, { params }: Params) {
-  const { session, response } = await requireSession();
+  const { session, response } = await requireSessionOrApiKey(req);
   if (response) return response;
   const { mealPlanId } = await params;
 
@@ -89,7 +89,7 @@ export async function POST(req: NextRequest, { params }: Params) {
 }
 
 export async function DELETE(req: NextRequest, { params }: Params) {
-  const { session, response } = await requireSession();
+  const { session, response } = await requireSessionOrApiKey(req);
   if (response) return response;
   const { mealPlanId } = await params;
 

apps/web/app/api/v1/meal-plans/shared/[mealPlanId]/route.ts

@@ -1,12 +1,12 @@
 import { NextRequest, NextResponse } from "next/server";
 import { db, mealPlans, users, eq } from "@epicure/db";
-import { requireSession } from "@/lib/api-auth";
+import { requireSessionOrApiKey } from "@/lib/api-auth";
 import { getMealPlanAccessById } from "@/lib/meal-plan-access";
 
 type Params = { params: Promise<{ mealPlanId: string }> };
 
-export async function GET(_req: NextRequest, { params }: Params) {
-  const { session, response } = await requireSession();
+export async function GET(req: NextRequest, { params }: Params) {
+  const { session, response } = await requireSessionOrApiKey(req);
   if (response) return response;
   const { mealPlanId } = await params;