fix: keep signal card text light

foundations.html

@@ -46,6 +46,22 @@
     </table>
   </section>
 
+  <section id="foundations-card-text">
+    <h2 class="sg-sub-heading sg-text-on-dark">Card Semantic Tokens</h2>
+    <table class="sg-foundation-table sg-table-label">
+      <thead>
+        <tr>
+          <th>Name</th>
+          <th>Wert</th>
+          <th>Verwendung</th>
+        </tr>
+      </thead>
+      <tbody>
+        <tr><td>text-card-signal</td><td>font-light</td><td>Weiße Schrift auf allen farbigen Signal-Segmenten, unabhängig vom übergeordneten Card-Kontext.</td></tr>
+      </tbody>
+    </table>
+  </section>
+
   <section id="foundations-states">
     <h2 class="sg-sub-heading sg-text-on-dark">States</h2>
     <table class="sg-foundation-table sg-table-label">