feat(frontend) : add current time indicator line on calendar

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/components/time-tracking/TimeTrackingCalendar.vue

@@ -108,6 +108,18 @@
                     </div>
                 </div>
 
+                <!-- Current time indicator -->
+                <div
+                    v-if="isToday(day.date)"
+                    class="absolute left-0 right-0 z-10 pointer-events-none"
+                    :style="{ top: `${currentTimeTopPx}px` }"
+                >
+                    <div class="relative flex items-center">
+                        <div class="absolute -left-[5px] h-[10px] w-[10px] rounded-full bg-orange-500" />
+                        <div class="h-[2px] w-full bg-orange-500" />
+                    </div>
+                </div>
+
                 <!-- Drag ghost preview -->
                 <div
                     v-if="dragState && dragState.targetDayIndex === dayIndex"
@@ -154,6 +166,27 @@ const gridBodyEl = ref<HTMLElement | null>(null)
 const dayColumnEls = ref<HTMLElement[]>([])
 const stickyOffset = computed(() => props.stickyOffset ?? 0)
 
+// --- Current time indicator ---
+const nowMinutes = ref(0)
+let nowTimer: ReturnType<typeof setInterval> | undefined
+
+function updateNowMinutes() {
+    const now = new Date()
+    nowMinutes.value = now.getHours() * 60 + now.getMinutes()
+}
+
+const currentTimeTopPx = computed(() => (nowMinutes.value / 60) * hourHeight)
+
+updateNowMinutes()
+
+onMounted(() => {
+    nowTimer = setInterval(updateNowMinutes, 60_000)
+})
+
+onUnmounted(() => {
+    clearInterval(nowTimer)
+})
+
 function getScrollParent(): HTMLElement | null {
     let el = calendarEl.value?.parentElement
     while (el) {