Split multi-hook frontend modules into single-hook files

frontend/src/hooks/useJailConfigs.ts

@@ -0,0 +1,77 @@
+/**
+ * React hook for loading the jail config inventory.
+ */
+
+import { useCallback, useEffect, useRef, useState } from "react";
+import { fetchJailConfigs, reloadConfig, updateJailConfig } from "../api/config";
+import { handleFetchError } from "../utils/fetchError";
+import type { JailConfig, JailConfigUpdate } from "../types/config";
+
+export interface UseJailConfigsResult {
+  jails: JailConfig[];
+  total: number;
+  loading: boolean;
+  error: string | null;
+  refresh: () => void;
+  updateJail: (name: string, update: JailConfigUpdate) => Promise<void>;
+  reloadAll: () => Promise<void>;
+}
+
+/**
+ * Load all jail configs and expose update controls.
+ */
+export function useJailConfigs(): UseJailConfigsResult {
+  const [jails, setJails] = useState<JailConfig[]>([]);
+  const [total, setTotal] = useState(0);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const abortRef = useRef<AbortController | null>(null);
+
+  const load = useCallback((): void => {
+    abortRef.current?.abort();
+    const ctrl = new AbortController();
+    abortRef.current = ctrl;
+    setLoading(true);
+    setError(null);
+
+    fetchJailConfigs()
+      .then((resp) => {
+        if (!ctrl.signal.aborted) {
+          setJails(resp.jails);
+          setTotal(resp.total);
+        }
+      })
+      .catch((err: unknown) => {
+        if (!ctrl.signal.aborted) {
+          handleFetchError(err, setError, "Failed to fetch jail configs");
+        }
+      })
+      .finally(() => {
+        if (!abortRef.current?.signal.aborted) {
+          setLoading(false);
+        }
+      });
+  }, []);
+
+  useEffect(() => {
+    load();
+    return (): void => {
+      abortRef.current?.abort();
+    };
+  }, [load]);
+
+  const updateJail = useCallback(
+    async (name: string, update: JailConfigUpdate): Promise<void> => {
+      await updateJailConfig(name, update);
+      load();
+    },
+    [load],
+  );
+
+  const reloadAll = useCallback(async (): Promise<void> => {
+    await reloadConfig();
+    load();
+  }, [load]);
+
+  return { jails, total, loading, error, refresh: load, updateJail, reloadAll };
+}