fix: dashboard offers card showing wrong counts

Queried status "converted"/"expired" but actual DB values are
"ordered"/"invalidated". Updated label "Prošlé" → "Zneplatněné".

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/routes/admin/dashboard.ts

@@ -142,8 +142,8 @@ export default async function dashboardRoutes(
       const [openCount, convertedCount, expiredCount, createdThisMonth] =
         await Promise.all([
           prisma.quotations.count({ where: { status: "active" } }),
-          prisma.quotations.count({ where: { status: "converted" } }),
-          prisma.quotations.count({ where: { status: "expired" } }),
+          prisma.quotations.count({ where: { status: "ordered" } }),
+          prisma.quotations.count({ where: { status: "invalidated" } }),
           prisma.quotations.count({
             where: { created_at: { gte: monthStart, lt: monthEnd } },
           }),