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/(dashboard)/[portSlug]/invoices/new/page.tsx

@@ -4,7 +4,7 @@ import { useState } from 'react';
 import { useParams, useRouter } from 'next/navigation';
 import { useForm, FormProvider } from 'react-hook-form';
 import { zodResolver } from '@hookform/resolvers/zod';
-import { useMutation, useQuery } from '@tanstack/react-query';
+import { useMutation } from '@tanstack/react-query';
 import { ChevronLeft, ChevronRight, Check, Loader2 } from 'lucide-react';
 
 import { Button } from '@/components/ui/button';
@@ -19,7 +19,6 @@ import {
   SelectValue,
 } from '@/components/ui/select';
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
-import { Badge } from '@/components/ui/badge';
 import { InvoiceLineItems } from '@/components/invoices/invoice-line-items';
 import { apiFetch } from '@/lib/api/client';
 import { createInvoiceSchema, type CreateInvoiceInput } from '@/lib/validators/invoices';
@@ -75,7 +74,7 @@ export default function NewInvoicePage() {
         method: 'POST',
         body: data,
       }),
-    onSuccess: (res: any) => {
+    onSuccess: (res: { data?: { id?: string } }) => {
       const id = res?.data?.id;
       if (id) {
         router.push(`/${portSlug}/invoices/${id}`);
@@ -217,7 +216,7 @@ export default function NewInvoicePage() {
                     <Label>Payment Terms</Label>
                     <Select
                       defaultValue="net30"
-                      onValueChange={(v) => setValue('paymentTerms', v as any)}
+                      onValueChange={(v) => setValue('paymentTerms', v as CreateInvoiceInput['paymentTerms'])}
                     >
                       <SelectTrigger>
                         <SelectValue placeholder="Select terms" />
@@ -266,7 +265,7 @@ export default function NewInvoicePage() {
                 <InvoiceLineItems name="lineItems" />
                 {errors.lineItems && !Array.isArray(errors.lineItems) && (
                   <p className="text-xs text-destructive mt-2">
-                    {(errors.lineItems as any).message}
+                    {(errors.lineItems as { message?: string }).message}
                   </p>
                 )}
                 {errors.root && (