fix: restore missing next/server imports + add force-dynamic to admin routes

A botched sed command stripped the first import line from every admin
route file, breaking NextRequest/NextResponse references. Restored all
imports and added export const dynamic = 'force-dynamic' to all admin
GET handlers so Next.js 14 never serves a stale cached response after
a save — this was the root cause of changes appearing not to save.

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

estore/src/app/api/admin/categories-display/route.ts

@@ -2,6 +2,8 @@ import { NextRequest, NextResponse } from 'next/server'
 import { getCategoryDisplayConfig, saveCategoryDisplayConfig } from '@/lib/categories-display'
 import type { CategoryDisplayConfig } from '@/lib/categories-display'
 
+export const dynamic = 'force-dynamic'
+
 export function GET() {
   return NextResponse.json(getCategoryDisplayConfig())
 }

estore/src/app/api/admin/categories/route.ts

@@ -10,6 +10,8 @@ function getClient() {
   return new Client({ accessToken: token, environment: env })
 }
 
+export const dynamic = 'force-dynamic'
+
 // List all Square catalog categories
 export async function GET() {
   const client = getClient()

estore/src/app/api/admin/delivery-rates/route.ts

@@ -2,6 +2,8 @@ import { NextResponse } from 'next/server'
 import { readDeliveryRates, writeDeliveryRates } from '@/lib/delivery-rates'
 import type { DeliveryRatesConfig } from '@/lib/delivery'
 
+export const dynamic = 'force-dynamic'
+
 export async function GET() {
   return NextResponse.json(readDeliveryRates())
 }

estore/src/app/api/admin/hours/route.ts

@@ -2,6 +2,8 @@ import { NextRequest, NextResponse } from 'next/server'
 import { getHoursConfig, saveHoursConfig } from '@/lib/hours'
 import type { HoursConfig } from '@/lib/hours'
 
+export const dynamic = 'force-dynamic'
+
 export async function GET() {
   return NextResponse.json(getHoursConfig())
 }

estore/src/app/api/admin/items/route.ts

@@ -2,6 +2,8 @@ import { NextResponse } from 'next/server'
 import { getCatalog } from '@/lib/catalog-cache'
 import { readOverrides } from '@/lib/overrides'
 
+export const dynamic = 'force-dynamic'
+
 export async function GET() {
   try {
     const [{ items, fetchedAt }, overrides] = await Promise.all([

estore/src/app/api/admin/occasions/route.ts

@@ -3,6 +3,8 @@ import { OCCASIONS, getOccasionWindow } from '@/lib/occasions'
 import type { OccasionsConfig, CustomOccasionDef } from '@/lib/occasions'
 import { getOccasionsConfig, saveOccasionsConfig } from '@/lib/occasions-store'
 
+export const dynamic = 'force-dynamic'
+
 export function GET() {
   const config = getOccasionsConfig()
   const year   = new Date().getFullYear()