fixing storage management dashboard

frontend/src/api/storage.ts

@@ -155,7 +155,12 @@ export const zfsApi = {
   },
 
   deleteDataset: async (poolId: string, datasetName: string): Promise<void> => {
-    await apiClient.delete(`/storage/zfs/pools/${poolId}/datasets/${datasetName}`)
+    await apiClient.delete(`/storage/zfs/pools/${poolId}/datasets/${encodeURIComponent(datasetName)}`)
+  },
+
+  getARCStats: async (): Promise<ARCStats> => {
+    const response = await apiClient.get<ARCStats>('/storage/zfs/arc/stats')
+    return response.data
   },
 }
 
@@ -174,3 +179,17 @@ export interface ZFSDataset {
   created_at: string
 }
 
+export interface ARCStats {
+  hit_ratio: number
+  cache_usage: number
+  cache_size: number
+  cache_max: number
+  hits: number
+  misses: number
+  demand_hits: number
+  prefetch_hits: number
+  mru_hits: number
+  mfu_hits: number
+  collected_at: string
+}
+