fix(lab-card): stack links vertically, right-align in horizontal mode

Two defects reported on the home page:

- Links weren't right-aligned. The link column sat in the right grid
  track but its flex children aligned to the column's start, so the
  block hugged the center gutter.
- The second link in a group appeared slightly lower. The list was
  flex-wrap with a row gap; two-link groups would wrap unpredictably
  when the label widths were close to the column width.

Switch the link list to a vertical stack. In horizontal-band mode
(container ≥40rem), right-align each group and its anchors with
flex-end + text-align: end. On narrow stacked cards, default start
alignment is preserved so the link list reads naturally below the
intro.

Author: danielnaab

src/design/components/lab-card/styles.css

@@ -58,8 +58,8 @@
     padding: 0;
     margin: 0;
     display: flex;
-    flex-wrap: wrap;
-    gap: var(--space-3) var(--space-4);
+    flex-direction: column;
+    gap: var(--space-2);
   }
 
   .lab-card__link-anchor {
@@ -97,5 +97,12 @@
       gap: var(--space-6);
       align-items: start;
     }
+    .lab-card__group {
+      align-items: flex-end;
+      text-align: end;
+    }
+    .lab-card__link-list {
+      align-items: flex-end;
+    }
   }
 }