Add accounts UI with list, create, edit, detail tabs for all sub-entities

Accounts list with paginated table, search, sort. Account detail page with
tabs for members, payment methods, tax exemptions, and processor links.
All sub-entities have create/edit dialogs and delete actions. Forms use
shared Zod schemas via react-hook-form.

packages/admin/src/components/accounts/tax-exemption-form.tsx

@@ -0,0 +1,61 @@
+import { useForm } from 'react-hook-form'
+import { zodResolver } from '@hookform/resolvers/zod'
+import { TaxExemptionCreateSchema } from '@forte/shared/schemas'
+import type { TaxExemptionCreateInput } from '@forte/shared/schemas'
+import { Button } from '@/components/ui/button'
+import { Input } from '@/components/ui/input'
+import { Label } from '@/components/ui/label'
+import { Textarea } from '@/components/ui/textarea'
+
+interface TaxExemptionFormProps {
+  accountId: string
+  onSubmit: (data: Record<string, unknown>) => void
+  loading?: boolean
+}
+
+export function TaxExemptionForm({ accountId, onSubmit, loading }: TaxExemptionFormProps) {
+  const {
+    register,
+    handleSubmit,
+    formState: { errors },
+  } = useForm<TaxExemptionCreateInput>({
+    resolver: zodResolver(TaxExemptionCreateSchema),
+    defaultValues: {
+      accountId,
+      certificateNumber: '',
+    },
+  })
+
+  return (
+    <form onSubmit={handleSubmit(onSubmit)} className="space-y-4">
+      <div className="space-y-2">
+        <Label htmlFor="certNumber">Certificate Number *</Label>
+        <Input id="certNumber" {...register('certificateNumber')} />
+        {errors.certificateNumber && (
+          <p className="text-sm text-destructive">{errors.certificateNumber.message}</p>
+        )}
+      </div>
+      <div className="grid grid-cols-2 gap-4">
+        <div className="space-y-2">
+          <Label htmlFor="certType">Certificate Type</Label>
+          <Input id="certType" {...register('certificateType')} placeholder="resale" />
+        </div>
+        <div className="space-y-2">
+          <Label htmlFor="issuingState">Issuing State</Label>
+          <Input id="issuingState" {...register('issuingState')} placeholder="TX" maxLength={2} />
+        </div>
+      </div>
+      <div className="space-y-2">
+        <Label htmlFor="expiresAt">Expires</Label>
+        <Input id="expiresAt" type="date" {...register('expiresAt')} />
+      </div>
+      <div className="space-y-2">
+        <Label htmlFor="exemptNotes">Notes</Label>
+        <Textarea id="exemptNotes" {...register('notes')} />
+      </div>
+      <Button type="submit" disabled={loading}>
+        {loading ? 'Saving...' : 'Add Tax Exemption'}
+      </Button>
+    </form>
+  )
+}