Fix build: resolve Turbopack client bundle and font issues

- Move EXPENSE_CATEGORIES to ~/lib/expense-categories.ts to break
  server router import chain from client component
- Use inline import() types in trpc/react.tsx to prevent Turbopack
  from including server modules (pg, db) in the client bundle
- Replace next/font/google with system font stacks to fix build
  failures in environments without Google Fonts access

https://claude.ai/code/session_012sqEgNQpx676isepeoX4Mi

src/app/dashboard/expenses/page.tsx

@@ -29,7 +29,7 @@ import { NumberInput } from "~/components/ui/number-input";
 import { toast } from "sonner";
 import { Plus, Pencil, Trash2, Receipt } from "lucide-react";
 import { formatCurrency, SUPPORTED_CURRENCIES } from "~/lib/currency";
-import { EXPENSE_CATEGORIES } from "~/server/api/routers/expenses";
+import { EXPENSE_CATEGORIES } from "~/lib/expense-categories";
 
 interface ExpenseFormData {
   date: Date;