fix: change picture

app/citizen-frontend/src/pages/course.vue

@@ -211,7 +211,10 @@
           </v-card>
 
           <!-- 運動時間建議：對應 doc/運動時間建議.png -->
-          <v-card class="rounded-lg elevation-1 mt-4 overflow-hidden">
+          <v-card
+            v-if="EXERCISE_DURATION_RECOMMENDATION_ENABLED"
+            class="rounded-lg elevation-1 mt-4 overflow-hidden"
+          >
             <v-expansion-panels
               v-model="durationTablePanel"
               flat
@@ -398,6 +401,7 @@
 import type { TimeSlot, YesNo } from "@/api/types";
 import { computed, onMounted, ref } from "vue";
 import Layout from "@/components/layout/DefaultLayout.vue";
+import { EXERCISE_DURATION_RECOMMENDATION_ENABLED } from "@/config/features";
 import { COURSE_DETAIL } from "@/data/courseDetail";
 import { useCourseStore } from "@/stores/course";