fix: resolve 6 Gitea issues (#9, #10, #12, #14, #15, #21)

- #21: Add missing await in removeChoiceIfPresent() to prevent user appearing in two restaurants
- #15: Add 1-hour TTL for menu refetching to avoid scraping on every page load
- #9: Block stats API and UI navigation for future dates
- #14: Add restaurant warnings (missing soup/prices, stale data) with warning icon
- #12: Pre-fill restaurant/departure dropdowns from existing choices on page refresh
- #10: Add voting statistics endpoint and table on stats page

server/src/routes/votingRoutes.ts

@@ -1,7 +1,7 @@
 import express, { Request } from "express";
 import { getLogin } from "../auth";
 import { parseToken } from "../utils";
-import { getUserVotes, updateFeatureVote } from "../voting";
+import { getUserVotes, updateFeatureVote, getVotingStats } from "../voting";
 import { GetVotesData, UpdateVoteData } from "../../../types";
 
 const router = express.Router();
@@ -23,4 +23,11 @@ router.post("/updateVote", async (req: Request<{}, any, UpdateVoteData["body"]>,
     } catch (e: any) { next(e) }
 });
 
+router.get("/stats", async (req, res, next) => {
+    try {
+        const data = await getVotingStats();
+        res.status(200).json(data);
+    } catch (e: any) { next(e) }
+});
+
 export default router;