fix: corriger erreurs ESLint sync (apostrophes, imports inutilisés)

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

src/app/api/sync/history/route.ts

@@ -1,8 +1,8 @@
-import { NextRequest, NextResponse } from 'next/server'
+import { NextResponse } from 'next/server'
 import { prisma } from '@/lib/prisma'
 import type { SyncHistoryEntry, SyncLogEntry } from '@/types/sync'
 
-export async function GET(_req: NextRequest) {
+export async function GET() {
   try {
     const runs = await prisma.syncRun.findMany({
       orderBy: { createdAt: 'desc' },

src/app/api/sync/preview/route.ts

@@ -1,9 +1,9 @@
-import { NextRequest, NextResponse } from 'next/server'
+import { NextResponse } from 'next/server'
 import { readSheetProducts } from '@/lib/googleSheets'
 import { fetchAllShopifyProducts } from '@/lib/shopifySync'
 import { computeDiff } from '@/lib/syncDiff'
 
-export async function GET(_req: NextRequest) {
+export async function GET() {
   try {
     const [sheetProducts, shopifyProducts] = await Promise.all([
       readSheetProducts(),