修复签到日历人数显示

Co-Authored-By: Claude <noreply@anthropic.com>

meshmap_frontend/src/components/SignedPage.vue

@@ -14,6 +14,7 @@ const calendarMonth = ref(new Date())
 const dailyCounts = ref<Record<string, number>>({})
 const selectedDate = ref('')
 const weekdays = ['日', '一', '二', '三', '四', '五', '六']
+const todayDate = formatDateKey(new Date())
 
 const calendarDays = computed(() => monthDays(calendarMonth.value))
 
@@ -150,7 +151,7 @@ onMounted(() => {
             v-else
             type="button"
             class="signed-calendar-day"
-            :class="{ selected: selectedDate === day, 'has-signs': dailyCounts[day] }"
+            :class="{ selected: selectedDate === day, today: todayDate === day, 'has-signs': dailyCounts[day] }"
             @click="selectDate(day)"
           >
             <span class="signed-calendar-date">{{ Number(day.slice(8, 10)) }}</span>

meshmap_frontend/src/style.css

@@ -1291,6 +1291,13 @@ button.signed-calendar-day:not(:disabled):hover {
   background: var(--color-primary-soft);
 }
 
+.signed-calendar-day.today {
+  border-color: var(--color-warning);
+  color: color-mix(in srgb, var(--color-warning) 72%, var(--color-heading));
+  background: var(--color-warning-soft);
+  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--color-warning) 36%, transparent);
+}
+
 .signed-calendar-day.selected {
   border-color: var(--color-primary);
   color: #fff;