style: tighten export tab spacing

src/pages/ExportPage.scss

@@ -1630,7 +1630,7 @@
     border: 1px solid var(--border-color);
     background: var(--bg-secondary);
     color: var(--text-secondary);
-    padding: 7px 12px;
+    padding: 7px 8px;
     border-radius: 999px;
     cursor: pointer;
     font-size: 13px;