fix: repair brace mismatch in DataContext and replace PV Pool column with Dataset

- TnsCsiDataContext: pool stats fetch was outside the outer try block due
  to a brace mismatch introduced when adding TrueNAS API integration;
  this caused the entire fetchAsync function to throw a syntax-level
  error, breaking the OverviewPage
- StorageClassColumns (PV): replace non-populating Pool column with
  Dataset column (tns-csi driver writes datasetName, not pool, into
  PV volumeAttributes)

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

src/api/TnsCsiDataContext.tsx

@@ -168,32 +168,32 @@ export function TnsCsiDataProvider({ children }: { children: React.ReactNode })
             setVolumeSnapshots([]);
           }
         }
-      // TrueNAS pool stats (only when API key is configured)
-      const config = getTnsCsiConfig();
-      if (config.truenasApiKey.trim()) {
-        // Determine server: explicit override → first SC server param → fail gracefully
-        const server = config.truenasServerOverride.trim();
-        if (server) {
-          try {
-            const pools = await fetchTruenasPoolStats(server, config.truenasApiKey.trim());
-            if (!cancelled) {
-              setPoolStats(pools);
-              setPoolStatsError(null);
-            }
-          } catch (err: unknown) {
-            if (!cancelled) {
-              setPoolStats([]);
-              setPoolStatsError(err instanceof Error ? err.message : String(err));
+
+        // TrueNAS pool stats (only when API key is configured)
+        const config = getTnsCsiConfig();
+        if (config.truenasApiKey.trim()) {
+          const server = config.truenasServerOverride.trim();
+          if (server) {
+            try {
+              const pools = await fetchTruenasPoolStats(server, config.truenasApiKey.trim());
+              if (!cancelled) {
+                setPoolStats(pools);
+                setPoolStatsError(null);
+              }
+            } catch (err: unknown) {
+              if (!cancelled) {
+                setPoolStats([]);
+                setPoolStatsError(err instanceof Error ? err.message : String(err));
+              }
             }
           }
+        } else {
+          if (!cancelled) {
+            setPoolStats([]);
+            setPoolStatsError(null);
+          }
         }
-      } else {
-        if (!cancelled) {
-          setPoolStats([]);
-          setPoolStatsError(null);
-        }
-      }
-    } catch (err: unknown) {
+      } catch (err: unknown) {
         if (!cancelled) {
           setAsyncError(err instanceof Error ? err.message : String(err));
         }

src/components/integrations/StorageClassColumns.tsx

@@ -2,7 +2,7 @@
  * StorageClassColumns — registerResourceTableColumnsProcessor for StorageClass and PV tables.
  *
  * Adds Protocol/Pool/Server columns to the native /storage-classes table and
- * Protocol/Volume Handle columns to the native /persistent-volumes table.
+ * Protocol/Dataset columns to the native /persistent-volumes table.
  *
  * Items in column processors are KubeObject class instances from Headlamp.
  * Raw Kubernetes JSON fields (parameters, spec, status) must be accessed
@@ -131,18 +131,18 @@ export function buildPVColumns() {
       },
     },
     {
-      label: 'Volume Handle',
+      label: 'Dataset',
       getValue: (pv: unknown): string | null => {
         const driver = getField(pv, 'spec', 'csi', 'driver') as string | undefined;
         if (driver !== TNS_CSI_PROVISIONER) return null;
-        const h = getField(pv, 'spec', 'csi', 'volumeHandle');
-        return typeof h === 'string' ? h : null;
+        const d = getField(pv, 'spec', 'csi', 'volumeAttributes', 'datasetName');
+        return typeof d === 'string' ? d : null;
       },
       render: (pv: unknown) => {
         const driver = getField(pv, 'spec', 'csi', 'driver') as string | undefined;
         if (driver !== TNS_CSI_PROVISIONER) return <span>—</span>;
-        const handle = getField(pv, 'spec', 'csi', 'volumeHandle') as string | undefined;
-        return <span style={{ fontFamily: 'monospace', fontSize: '0.85em' }}>{handle ?? '—'}</span>;
+        const dataset = getField(pv, 'spec', 'csi', 'volumeAttributes', 'datasetName') as string | undefined;
+        return <span style={{ fontFamily: 'monospace', fontSize: '0.85em' }}>{dataset ?? '—'}</span>;
       },
     },
   ];