feat(parcel-sync): DXF export in ZIP + detailed tooltips on hero buttons

DXF Export:
- Add gpkgToDxf() helper using ogr2ogr -f DXF (non-fatal fallback)
- export-local: terenuri.dxf, cladiri.dxf, terenuri_magic.dxf in ZIP
- export-bundle: same DXF files alongside GPKGs
- Zero overhead — conversion runs locally from DB data, no eTerra calls

Hero Button Tooltips:
- Hover shows ZIP contents: layer names, entity counts, sync dates
- Base tooltip: "GPKG + DXF per layer"
- Magic tooltip: "GPKG + DXF + CSV complet + Raport calitate"

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

src/app/api/eterra/export-bundle/route.ts

@@ -562,6 +562,19 @@ export async function POST(req: Request) {
     zip.file("terenuri.gpkg", terenuriGpkg);
     zip.file("cladiri.gpkg", cladiriGpkg);
 
+    // DXF versions (non-fatal)
+    try {
+      const { gpkgToDxf } = await import(
+        "@/modules/parcel-sync/services/gpkg-export"
+      );
+      const tDxf = await gpkgToDxf(terenuriGpkg, "TERENURI_ACTIVE");
+      if (tDxf) zip.file("terenuri.dxf", tDxf);
+      const cDxf = await gpkgToDxf(cladiriGpkg, "CLADIRI_ACTIVE");
+      if (cDxf) zip.file("cladiri.dxf", cDxf);
+    } catch {
+      // DXF conversion not available — skip silently
+    }
+
     // ── Comprehensive quality analysis ──
     const withGeomRecords = dbTerenuri.filter(
       (r) =>
@@ -685,6 +698,15 @@ export async function POST(req: Request) {
 
     if (validated.mode === "magic" && magicGpkg && csvContent) {
       zip.file("terenuri_magic.gpkg", magicGpkg);
+      try {
+        const { gpkgToDxf } = await import(
+          "@/modules/parcel-sync/services/gpkg-export"
+        );
+        const mDxf = await gpkgToDxf(magicGpkg, "TERENURI_MAGIC");
+        if (mDxf) zip.file("terenuri_magic.dxf", mDxf);
+      } catch {
+        // DXF conversion not available
+      }
       zip.file("terenuri_complet.csv", csvContent);
       report.magic = {
         csvRows: csvContent.split("\n").length - 1,