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

client/src/pages/StatsPage.tsx

@@ -1,10 +1,10 @@
-import { useCallback, useEffect, useState } from "react";
+import { useCallback, useEffect, useMemo, useState } from "react";
 import Footer from "../components/Footer";
 import Header from "../components/Header";
 import { useAuth } from "../context/auth";
 import Login from "../Login";
 import { formatDate, getFirstWorkDayOfWeek, getHumanDate, getLastWorkDayOfWeek } from "../Utils";
-import { WeeklyStats, LunchChoice, getStats } from "../../../types";
+import { WeeklyStats, LunchChoice, VotingStats, getStats, getVotingStats } from "../../../types";
 import Loader from "../components/Loader";
 import { faChevronLeft, faChevronRight, faGear } from "@fortawesome/free-solid-svg-icons";
 import { Legend, Line, LineChart, Tooltip, XAxis, YAxis } from "recharts";
@@ -32,6 +32,7 @@ export default function StatsPage() {
   const auth = useAuth();
   const [dateRange, setDateRange] = useState<Date[]>();
   const [data, setData] = useState<WeeklyStats>();
+  const [votingStats, setVotingStats] = useState<VotingStats>();
 
   // Prvotní nastavení aktuálního týdne
   useEffect(() => {
@@ -48,6 +49,19 @@ export default function StatsPage() {
     }
   }, [dateRange]);
 
+  // Načtení statistik hlasování
+  useEffect(() => {
+    getVotingStats().then(response => {
+      setVotingStats(response.data);
+    });
+  }, []);
+
+  const sortedVotingStats = useMemo(() => {
+    if (!votingStats) return [];
+    return Object.entries(votingStats)
+      .sort((a, b) => (b[1] as number) - (a[1] as number));
+  }, [votingStats]);
+
   const renderLine = (location: LunchChoice) => {
     const index = Object.values(LunchChoice).indexOf(location);
     return <Line key={location} name={getLunchChoiceName(location)} type="monotone" dataKey={data => data.locations[location] ?? 0} stroke={COLORS[index]} strokeWidth={STROKE_WIDTH} />
@@ -73,13 +87,20 @@ export default function StatsPage() {
     }
   }
 
+  const isCurrentOrFutureWeek = useMemo(() => {
+    if (!dateRange) return true;
+    const currentWeekEnd = getLastWorkDayOfWeek(new Date());
+    currentWeekEnd.setHours(23, 59, 59, 999);
+    return dateRange[1] >= currentWeekEnd;
+  }, [dateRange]);
+
   const handleKeyDown = useCallback((e: any) => {
     if (e.keyCode === 37) {
       handlePreviousWeek();
-    } else if (e.keyCode === 39) {
+    } else if (e.keyCode === 39 && !isCurrentOrFutureWeek) {
       handleNextWeek()
     }
-  }, [dateRange]);
+  }, [dateRange, isCurrentOrFutureWeek]);
 
   useEffect(() => {
     document.addEventListener('keydown', handleKeyDown);
@@ -111,7 +132,7 @@ export default function StatsPage() {
           </span>
           <h2 className="date-range">{getHumanDate(dateRange[0])} - {getHumanDate(dateRange[1])}</h2>
           <span title="Následující týden">
-            <FontAwesomeIcon icon={faChevronRight} style={{ cursor: "pointer" }} onClick={handleNextWeek} />
+            <FontAwesomeIcon icon={faChevronRight} style={{ cursor: "pointer", visibility: isCurrentOrFutureWeek ? "hidden" : "visible" }} onClick={handleNextWeek} />
           </span>
         </div>
         <LineChart width={CHART_WIDTH} height={CHART_HEIGHT} data={data}>
@@ -121,6 +142,27 @@ export default function StatsPage() {
           <Tooltip />
           <Legend />
         </LineChart>
+        {sortedVotingStats.length > 0 && (
+          <div className="voting-stats-section">
+            <h2>Hlasování o funkcích</h2>
+            <table className="voting-stats-table">
+              <thead>
+                <tr>
+                  <th>Funkce</th>
+                  <th>Počet hlasů</th>
+                </tr>
+              </thead>
+              <tbody>
+                {sortedVotingStats.map(([feature, count]) => (
+                  <tr key={feature}>
+                    <td>{feature}</td>
+                    <td>{count as number}</td>
+                  </tr>
+                ))}
+              </tbody>
+            </table>
+          </div>
+        )}
       </div>
       <Footer />
     </>