Adiciona paginacao no ranking do frontend

frontend/src/App.css

@@ -49,7 +49,7 @@
 .controls {
   margin: 1.5rem 0;
   display: flex;
-  gap: 1rem;
+  gap: 1.5rem;
   flex-wrap: wrap;
   align-items: center;
 }
@@ -77,6 +77,37 @@
   border-color: var(--accent-2);
 }
 
+.pagination {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  flex-wrap: wrap;
+}
+
+.pagination button {
+  padding: 0.6rem 0.9rem;
+  border-radius: 8px;
+  border: 1px solid var(--stroke);
+  background: rgba(255,255,255,0.06);
+  color: var(--text);
+  cursor: pointer;
+  transition: all 150ms ease;
+}
+
+.pagination button:hover:not(:disabled) {
+  border-color: var(--accent-2);
+}
+
+.pagination button:disabled {
+  opacity: 0.4;
+  cursor: not-allowed;
+}
+
+.page-info {
+  color: var(--muted);
+  font-weight: 500;
+}
+
 .ranking-list {
   display: flex;
   flex-direction: column;