Fix all ESLint errors so CI passes on every branch

- Move nested components outside parent functions (GraphsTab, ClientDetailPage, NetworkServicesDHCPPage)
- Add eslint-disable comments for intentional setState-in-effect patterns (form sync in DNS, NTP, Wireless pages)
- Fix unescaped quote entities in JSX (SystemConfigTab, GlobalSearch, TopologyPage)
- Fix empty catch block in main.tsx
- Convert ternary-as-statement to if/else in RadiosTab
- Move Date.now() calls into useMemo in DashboardPage (react-hooks/purity)
- Fix DOM mutation in event handler in TerminalModal (react-hooks/immutability)
- Wrap ref assignment in useLayoutEffect in useSocket (react-hooks/refs)
- Update TypeScript devDependency version pin to match installed version

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/hooks/useSocket.ts

@@ -1,4 +1,4 @@
-import { useEffect, useRef } from 'react';
+import { useEffect, useLayoutEffect, useRef } from 'react';
 import { io, Socket } from 'socket.io-client';
 import { useAuthStore } from '../store/authStore';
 
@@ -13,7 +13,7 @@ export function useSocket(
 ): void {
   const isAuthenticated = useAuthStore((s) => s.isAuthenticated);
   const eventsRef = useRef(events);
-  eventsRef.current = events;
+  useLayoutEffect(() => { eventsRef.current = events; });
 
   useEffect(() => {
     if (!isAuthenticated) return;