新增奖励兑换模式与奖励设置，并持久化兑换记录

src/components/ContentArea.tsx

@@ -13,6 +13,8 @@ const loadScoreManager = () => import("./ScoreManager")
 const loadLeaderboard = () => import("./Leaderboard")
 const loadSettlementHistory = () => import("./SettlementHistory")
 const loadAutoScoreManager = () => import("./AutoScoreManager")
+const loadRewardExchange = () => import("./RewardExchange")
+const loadRewardSettings = () => import("./RewardSettings")
 
 const Home = lazy(() => loadHome().then((m) => ({ default: m.Home })))
 const StudentManager = lazy(() => loadStudentManager().then((m) => ({ default: m.StudentManager })))
@@ -26,6 +28,12 @@ const SettlementHistory = lazy(() =>
 const AutoScoreManager = lazy(() =>
   loadAutoScoreManager().then((m) => ({ default: m.AutoScoreManager }))
 )
+const RewardExchange = lazy(() =>
+  loadRewardExchange().then((m) => ({ default: m.RewardExchange }))
+)
+const RewardSettings = lazy(() =>
+  loadRewardSettings().then((m) => ({ default: m.RewardSettings }))
+)
 
 const warmupRouteChunks = () =>
   Promise.allSettled([
@@ -37,6 +45,8 @@ const warmupRouteChunks = () =>
     loadLeaderboard(),
     loadSettlementHistory(),
     loadAutoScoreManager(),
+    loadRewardExchange(),
+    loadRewardSettings(),
   ])
 
 const { Content } = Layout
@@ -235,6 +245,14 @@ export function ContentArea({
             <Route path="/settlements" element={<SettlementHistory />} />
             <Route path="/reasons" element={<ReasonManager canEdit={permission === "admin"} />} />
             <Route path="/auto-score" element={<AutoScoreManager />} />
+            <Route
+              path="/reward-exchange"
+              element={<RewardExchange canEdit={permission === "admin" || permission === "points"} />}
+            />
+            <Route
+              path="/reward-settings"
+              element={<RewardSettings canEdit={permission === "admin"} />}
+            />
             <Route path="/settings" element={<Settings permission={permission} />} />
             <Route path="*" element={<Navigate to="/" replace />} />
           </Routes>