fix: price labels use user's selected currency instead of hardcoded $

Replaced hardcoded "Price ($)" labels across 6 components and 2 locale
files to display the user's selected currency (EUR, GBP, USD, etc.).
AddToCollectionModal also updated to show correct currency.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/client/routes/threads/$threadId/index.tsx

@@ -12,6 +12,7 @@ import {
 	useReorderCandidates,
 	useUpdateCandidate,
 } from "../../../hooks/useCandidates";
+import { useCurrency } from "../../../hooks/useCurrency";
 import { useImpactDeltas } from "../../../hooks/useImpactDeltas";
 import { useSetup } from "../../../hooks/useSetups";
 import { useThread } from "../../../hooks/useThreads";
@@ -340,6 +341,7 @@ const INITIAL_MODAL_FORM: ModalFormData = {
 
 function AddCandidateModal({ threadId, onClose }: AddCandidateModalProps) {
 	const createCandidate = useCreateCandidate(threadId);
+	const { currency } = useCurrency();
 	const [form, setForm] = useState<ModalFormData>(INITIAL_MODAL_FORM);
 	const [errors, setErrors] = useState<Record<string, string>>({});
 
@@ -490,7 +492,7 @@ function AddCandidateModal({ threadId, onClose }: AddCandidateModalProps) {
 								htmlFor="modal-candidate-price"
 								className="block text-sm font-medium text-gray-700 mb-1"
 							>
-								Price ($)
+								{`Price (${currency})`}
 							</label>
 							<input
 								id="modal-candidate-price"