feat(parcel-sync): sync button on empty Harta tab + intravilan in base sync

Map tab: when UAT has no local data, shows a "Sincronizează terenuri,
clădiri și intravilan" button that triggers background base sync.

Sync background (base mode): now also syncs LIMITE_INTRAV_DYNAMIC layer
(intravilan boundaries) alongside TERENURI_ACTIVE + CLADIRI_ACTIVE.
Non-critical — if intravilan fails, the rest continues.

Also fixed remaining \u2192 unicode escapes in export/layers/epay tabs.

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

src/app/api/eterra/sync-background/route.ts

@@ -221,6 +221,21 @@ async function runBackground(params: {
         throw new Error(r.error ?? "Sync clădiri failed");
     }
 
+    // Sync intravilan limits (always, lightweight layer)
+    phase = "Sincronizare limite intravilan";
+    push({});
+    try {
+      await syncLayer(username, password, siruta, "LIMITE_INTRAV_DYNAMIC", {
+        forceFullSync: forceSync,
+        jobId,
+        isSubStep: true,
+      });
+    } catch {
+      // Non-critical — don't fail the whole job
+      note = "Avertisment: limite intravilan nu s-au sincronizat";
+      push({});
+    }
+
     if (!terenuriNeedsSync && !cladiriNeedsSync) {
       note = "Date proaspete — sync skip";
     }