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/ui/DateFilter.vue

@@ -1,5 +1,5 @@
 <template>
-    <div class="date-filter">
+    <div class="date-filter inline-flex h-8 items-center [&>.dp__main]:!inline-flex [&>.dp__main]:!items-center">
         <VueDatePicker
             ref="datepicker"
             v-model="internalValue"
@@ -14,29 +14,11 @@
             @update:model-value="onUpdate"
         >
             <template #trigger>
-                <div class="flex items-center gap-1">
-                    <div class="relative cursor-pointer">
-                        <input
-                            :value="displayValue"
-                            class="w-full cursor-pointer rounded-md border border-neutral-300 bg-white px-3 py-[7px] pr-8 text-sm text-neutral-700 outline-none transition placeholder:text-neutral-400 focus:border-primary-500"
-                            :placeholder="t('common.dateFilter')"
-                            readonly
-                        />
-                        <button
-                            v-if="internalValue"
-                            class="absolute right-2 top-1/2 -translate-y-1/2 text-neutral-400 hover:text-neutral-600"
-                            @click.stop="onClear"
-                        >
-                            <Icon name="mdi:close-circle" size="16" />
-                        </button>
-                        <Icon
-                            v-else
-                            name="mdi:calendar"
-                            size="16"
-                            class="pointer-events-none absolute right-2 top-1/2 -translate-y-1/2 text-neutral-400"
-                        />
-                    </div>
-                </div>
+                <button
+                    class="relative flex h-8 w-8 items-center justify-center rounded-full text-orange-500 transition hover:bg-orange-50"
+                >
+                    <Icon name="mdi:calendar-blank" size="20" />
+                </button>
             </template>
 
             <template #action-buttons>