feat(worker): server-authoritative pause/resume on the stopwatch

apps/worker/src/api/sessions.ts

@@ -51,3 +51,25 @@ export function useDiscardSession() {
     },
   });
 }
+
+export function usePauseSession() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (id: number) =>
+      apiFetch<WorkSession>(`/api/sessions/${id}/pause`, { method: 'POST' }),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['sessions'] });
+    },
+  });
+}
+
+export function useResumeSession() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (id: number) =>
+      apiFetch<WorkSession>(`/api/sessions/${id}/resume`, { method: 'POST' }),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['sessions'] });
+    },
+  });
+}