fix(transactions): editable transaction type, fee/interest counted as spend, fees category

- TypeBadge is now clickable — opens inline select to change debit/credit/fee/interest/etc.
- PATCH /api/transactions/[id] now accepts transaction_type, updates transactions table directly
- Analytics monthly query includes fee and interest types as spend (not just debit)
- fee and interest amounts show red in transaction list (same as debit)
- Add fees category to taxonomy

src/lib/hooks.ts

@@ -94,6 +94,7 @@ export function useUpdateTransaction() {
       category?: string;
       merchant_normalized?: string;
       notes?: string;
+      transaction_type?: string;
     }) => {
       const res = await fetch(`/api/transactions/${id}`, {
         method: "PATCH",