Fix all ESLint errors: remove unused imports, replace any types

- Remove ~60 unused imports and variables across 88 files
- Replace ~80 `any` type annotations with proper types (unknown,
  Record<string, unknown>, or specific types)
- Prefix unused callback args with underscore
- Fix unescaped JSX entities
- Lint now passes cleanly (0 errors, 2 intentional img warnings)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/app/(portal)/layout.tsx

@@ -1,5 +1,4 @@
 import type { Metadata } from 'next';
-import { redirect } from 'next/navigation';
 
 import { getPortalSession } from '@/lib/portal/auth';
 import { getPortalDashboard } from '@/lib/services/portal.service';
@@ -13,8 +12,6 @@ export const metadata: Metadata = {
   },
 };
 
-const PUBLIC_PORTAL_PATHS = ['/portal/login', '/portal/verify'];
-
 export default async function PortalLayout({
   children,
 }: {