Add jail control actions to useJailDetail hook

Implement TASK F-2: Wrap JailDetailPage jail-control API calls in a hook.

Changes:
- Add start(), stop(), reload(), and setIdle() methods to useJailDetail hook
- Update JailDetailPage to use hook control methods instead of direct API imports
- Update error handling to remove dependency on ApiError type
- Add comprehensive tests for new control methods (8 tests)
- Update existing test to include new hook methods in mock

The control methods handle refetching jail data after each operation,
consistent with the pattern used in useJails hook.

frontend/src/hooks/useJails.ts

@@ -153,6 +153,14 @@ export interface UseJailDetailResult {
   removeIp: (ip: string) => Promise<void>;
   /** Enable or disable the ignoreself option for this jail. */
   toggleIgnoreSelf: (on: boolean) => Promise<void>;
+  /** Start the jail. */
+  start: () => Promise<void>;
+  /** Stop the jail. */
+  stop: () => Promise<void>;
+  /** Reload jail configuration. */
+  reload: () => Promise<void>;
+  /** Toggle idle mode on/off for the jail. */
+  setIdle: (on: boolean) => Promise<void>;
 }
 
 /**
@@ -216,6 +224,26 @@ export function useJailDetail(name: string): UseJailDetailResult {
     load();
   };
 
+  const doStart = async (): Promise<void> => {
+    await startJail(name);
+    load();
+  };
+
+  const doStop = async (): Promise<void> => {
+    await stopJail(name);
+    load();
+  };
+
+  const doReload = async (): Promise<void> => {
+    await reloadJail(name);
+    load();
+  };
+
+  const doSetIdle = async (on: boolean): Promise<void> => {
+    await setJailIdle(name, on);
+    load();
+  };
+
   return {
     jail,
     ignoreList,
@@ -226,6 +254,10 @@ export function useJailDetail(name: string): UseJailDetailResult {
     addIp,
     removeIp,
     toggleIgnoreSelf,
+    start: doStart,
+    stop: doStop,
+    reload: doReload,
+    setIdle: doSetIdle,
   };
 }