feat: add parcel-sync module (eTerra ANCPI integration with PostGIS)

- 31 eTerra layer catalog (terenuri, cladiri, documentatii, administrativ)
- Incremental sync engine (OBJECTID comparison, only downloads new features)
- PostGIS-ready Prisma schema (GisFeature, GisSyncRun, GisUat models)
- 7 API routes (/api/eterra/login, count, sync, features, layers/summary, progress, sync-status)
- Full UI with 3 tabs (Sincronizare, Parcele, Istoric)
- Env var auth (ETERRA_USERNAME / ETERRA_PASSWORD)
- Real-time sync progress tracking with polling

src/app/(modules)/parcel-sync/page.tsx

@@ -0,0 +1,33 @@
+"use client";
+
+import { FeatureGate } from "@/core/feature-flags";
+import { useI18n } from "@/core/i18n";
+import { ParcelSyncModule } from "@/modules/parcel-sync";
+
+export default function ParcelSyncPage() {
+  const { t } = useI18n();
+
+  return (
+    <FeatureGate flag="module.parcel-sync" fallback={<ModuleDisabled />}>
+      <div className="mx-auto max-w-6xl space-y-6">
+        <div>
+          <h1 className="text-2xl font-bold tracking-tight">
+            {t("parcel-sync.title")}
+          </h1>
+          <p className="text-muted-foreground">
+            {t("parcel-sync.description")}
+          </p>
+        </div>
+        <ParcelSyncModule />
+      </div>
+    </FeatureGate>
+  );
+}
+
+function ModuleDisabled() {
+  return (
+    <div className="mx-auto max-w-6xl py-12 text-center text-muted-foreground">
+      <p>Modulul eTerra Parcele este dezactivat.</p>
+    </div>
+  );
+}