Fix: stage state_merged.db after merge

sync.sh

@@ -155,7 +155,10 @@ finally:
     shutil.rmtree(tmpdir, ignore_errors=True)
 PYEOF
 
-# ── Step 5: Push ─────────────────────────────────────────────────────────
+# ── Step 5: Stage merged DB (it was just created in Step 4) ─────────────
+git add state_merged.db 2>/dev/null || true
+
+# ── Step 6: Push ─────────────────────────────────────────────────────────
 if [ "$HAS_LOCAL" = true ]; then
     git commit -m "Sync $(date '+%Y-%m-%d %H:%M')" 2>/dev/null || true
     if ! git push origin main 2>&1; then