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/components/layout/breadcrumbs.tsx

@@ -83,7 +83,7 @@ export function Breadcrumbs() {
             <BreadcrumbItem>
               <BreadcrumbLink asChild>
                 <Link
-                  href={`/${currentPortSlug}/dashboard` as any}
+                  href={`/${currentPortSlug}/dashboard`}
                   className="text-muted-foreground hover:text-foreground transition-colors"
                 >
                   {currentPort.name}
@@ -98,7 +98,7 @@ export function Breadcrumbs() {
           </>
         )}
 
-        {crumbs.map((crumb, index) => (
+        {crumbs.map((crumb, _index) => (
           <Fragment key={crumb.href}>
             <BreadcrumbItem>
               {crumb.isLast ? (
@@ -108,7 +108,7 @@ export function Breadcrumbs() {
               ) : (
                 <BreadcrumbLink asChild>
                   <Link
-                    href={crumb.href as any}
+                    href={crumb.href}
                     className="text-muted-foreground hover:text-foreground transition-colors"
                   >
                     {crumb.label}