feat(ui) : improve time-tracking UX, responsive tags, and task priority flag

- Add duplicate button in time entry drawer
- Make time entry blocks and list responsive (tags wrap, hide on narrow)
- Replace date filter input with calendar icon next to month title
- Fix scroll to current hour in calendar (use gridBodyEl)
- Show project color on ticket code in task cards and my-tasks
- Add red flag icon for high priority tasks in kanban and my-tasks

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/components/task/TaskCard.vue

@@ -9,7 +9,12 @@
         <div class="flex items-start justify-between gap-2">
             <div class="min-w-0">
                 <div class="flex items-center gap-1">
-                    <span v-if="task.project && task.number" class="text-xs font-medium text-neutral-400">{{ task.project.code }}{{ task.number }}</span>
+                    <span v-if="task.project && task.number" class="text-xs font-semibold" :style="{ color: task.project.color }">{{ task.project.code }}{{ task.number }}</span>
+                    <Icon
+                        v-if="task.priority?.label === 'Haute'"
+                        name="mdi:flag-variant"
+                        class="h-3.5 w-3.5 text-red-600"
+                    />
                     <Icon
                         v-if="task.clientTicket"
                         name="heroicons:user-circle"