Initial release v1.2.0 — Hellion NewTab Browser Extension

Persoenlicher Bookmark-Dashboard als Browser-Extension.
8 Themes, Drag & Drop, Sticky Notes, JSON Export/Import.
Chrome, Edge, Brave, Opera, Vivaldi (MV3) + Firefox (MV2).

Includes GitHub Actions for security scanning, code quality
validation, and automated release packaging.

src/js/data.js

@@ -0,0 +1,55 @@
+/* =============================================
+   HELLION NEWTAB — data.js
+   JSON Export / Import (Backup & Restore)
+   ============================================= */
+
+function initDataButtons() {
+  const btnExport = document.getElementById('btnExportJSON');
+  const btnImport = document.getElementById('btnImportJSON');
+  const jsonInput = document.getElementById('jsonImportInput');
+  if (!btnExport || !btnImport) return;
+
+  // Export
+  btnExport.addEventListener('click', () => {
+    const data = { version: '1.2.0', exported: new Date().toISOString(), boards, settings };
+    const blob = new Blob([JSON.stringify(data, null, 2)], { type: 'application/json' });
+    const url  = URL.createObjectURL(blob);
+    const a    = document.createElement('a');
+    a.href = url;
+    a.download = `hellion-newtab-backup-${new Date().toISOString().slice(0, 10)}.json`;
+    a.click();
+    URL.revokeObjectURL(url);
+  });
+
+  // Import
+  btnImport.addEventListener('click', () => jsonInput.click());
+  jsonInput.addEventListener('change', async e => {
+    const file = e.target.files[0];
+    if (!file) return;
+    try {
+      const data = JSON.parse(await file.text());
+      if (!Array.isArray(data.boards)) throw new Error('Ungültiges Format');
+      const validBoards = data.boards.filter(b => {
+        if (!b || typeof b.title !== 'string' || !Array.isArray(b.bookmarks)) return false;
+        b.id = b.id || uid();
+        b.blurred = !!b.blurred;
+        b.bookmarks = b.bookmarks.filter(bm => {
+          if (!bm || typeof bm.title !== 'string' || typeof bm.url !== 'string') return false;
+          bm.id = bm.id || uid();
+          bm.desc = bm.desc || '';
+          return true;
+        });
+        return true;
+      });
+      if (validBoards.length === 0) throw new Error('Keine gültigen Boards gefunden');
+      if (!confirm(`${validBoards.length} Boards importieren? Bestehende Daten bleiben erhalten.`)) return;
+      boards = [...boards, ...validBoards];
+      await saveBoards();
+      renderBoards();
+      alert(`✓ ${validBoards.length} Board(s) importiert.`);
+    } catch (err) {
+      alert('Fehler beim Import: ' + err.message);
+    }
+    e.target.value = '';
+  });
+}