Add ignore-self toggle to Jail Detail page

Implements the missing UI control for POST /api/jails/{name}/ignoreself:
- Add jailIgnoreSelf endpoint constant to endpoints.ts
- Add toggleIgnoreSelf(name, on) API function to jails.ts
- Expose toggleIgnoreSelf action from useJailDetail hook
- Replace read-only 'ignore self' badge with a Fluent Switch in
  IgnoreListSection to allow enabling/disabling the flag per jail
- Add 5 vitest tests for checked/unchecked state and toggle behaviour

frontend/src/hooks/useJails.ts

@@ -20,6 +20,7 @@ import {
   setJailIdle,
   startJail,
   stopJail,
+  toggleIgnoreSelf as toggleIgnoreSelfApi,
   unbanAllBans,
   unbanIp,
 } from "../api/jails";
@@ -150,6 +151,8 @@ export interface UseJailDetailResult {
   addIp: (ip: string) => Promise<void>;
   /** Remove an IP from the ignore list. */
   removeIp: (ip: string) => Promise<void>;
+  /** Enable or disable the ignoreself option for this jail. */
+  toggleIgnoreSelf: (on: boolean) => Promise<void>;
 }
 
 /**
@@ -208,6 +211,11 @@ export function useJailDetail(name: string): UseJailDetailResult {
     load();
   };
 
+  const toggleIgnoreSelf = async (on: boolean): Promise<void> => {
+    await toggleIgnoreSelfApi(name, on);
+    load();
+  };
+
   return {
     jail,
     ignoreList,
@@ -217,6 +225,7 @@ export function useJailDetail(name: string): UseJailDetailResult {
     refresh: load,
     addIp,
     removeIp,
+    toggleIgnoreSelf,
   };
 }