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/package.json

@@ -40,7 +40,7 @@
     "eslint-plugin-security": "^4.0.0",
     "postcss": "^8.4.33",
     "tailwindcss": "^3.4.1",
-    "typescript": "^5.3.3",
+    "typescript": "^5.9.3",
     "typescript-eslint": "^8.58.2",
     "vite": "^5.0.11"
   }