fix: replace stray role reference in system settings tab with inline placeholder

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/admin/pages/Settings.tsx

@@ -1546,15 +1546,31 @@ export default function Settings() {
                       </tbody>
                     </table>
                   ) : (
-                    <Skeleton
-                      name="settings-permissions"
-                      loading={
-                        !role.permissions || role.permissions.length === 0
-                      }
-                      fixture={<span>...</span>}
+                    <div
+                      style={{
+                        padding: "1rem",
+                        display: "flex",
+                        flexDirection: "column",
+                        gap: "0.5rem",
+                      }}
                     >
-                      <span>{role.permissions?.length || 0} oprávnění</span>
-                    </Skeleton>
+                      <div
+                        style={{
+                          height: "0.75rem",
+                          background: "#e0e0e0",
+                          borderRadius: "4px",
+                          width: "60%",
+                        }}
+                      />
+                      <div
+                        style={{
+                          height: "0.75rem",
+                          background: "#e0e0e0",
+                          borderRadius: "4px",
+                          width: "40%",
+                        }}
+                      />
+                    </div>
                   )}
                 </div>
               </motion.div>