feat(time-tracking) : extract time-tracking front into Nuxt module layer

Companion to the backend module migration (LST-64). The Nuxt layer is
auto-detected from frontend/modules/* — no nuxt.config change needed.

- Move page, timer store, time-entries service + DTO and the 6 time-tracking
  components into frontend/modules/time-tracking/.
- Rewrite explicit service/DTO imports to ~/modules/time-tracking/* (store and
  components stay auto-imported); update the dashboard (index.vue) consumer.
- Route /time-tracking preserved; i18n keys kept in the global locale file.

nuxt build passes; /time-tracking routed.

frontend/modules/time-tracking/components/TimeEntryList.vue

@@ -0,0 +1,106 @@
+<template>
+    <div class="space-y-2">
+        <div v-if="entries.length === 0" class="rounded-lg border border-neutral-200 bg-neutral-50 py-12 text-center text-sm text-neutral-400">
+            {{ $t('timeEntries.noEntries') }}
+        </div>
+
+        <div
+            v-for="entry in sortedEntries"
+            :key="entry.id"
+            class="group flex items-center gap-2 sm:gap-4 rounded-lg border border-neutral-200 bg-white px-3 sm:px-4 py-3 cursor-pointer transition hover:border-neutral-300 hover:shadow-sm"
+            @click="emit('editEntry', entry)"
+        >
+            <!-- Color bar -->
+            <div
+                class="h-10 w-1 shrink-0 rounded-full"
+                :style="{ backgroundColor: entry.project?.color ?? '#94a3b8' }"
+            />
+
+            <!-- Main info -->
+            <div class="min-w-0 flex-1">
+                <div class="truncate text-sm font-semibold text-neutral-900">
+                    {{ entry.title || $t('common.untitled') }}
+                </div>
+                <div v-if="entry.tags.length" class="mt-1 flex flex-wrap gap-1">
+                    <span
+                        v-for="tag in entry.tags"
+                        :key="tag.id"
+                        class="rounded-full px-2 py-0.5 text-[10px] font-semibold text-white"
+                        :style="{ backgroundColor: tag.color }"
+                    >
+                        {{ tag.label }}
+                    </span>
+                </div>
+                <div class="mt-0.5 flex items-center gap-2 text-xs text-neutral-500">
+                    <span v-if="entry.project">{{ entry.project.name }}</span>
+                    <span v-if="entry.project && stripRichText(entry.description)" class="text-neutral-300">·</span>
+                    <span v-if="stripRichText(entry.description)" class="truncate">{{ stripRichText(entry.description) }}</span>
+                </div>
+            </div>
+
+            <!-- Time info -->
+            <div class="shrink-0 text-right">
+                <div class="text-sm font-semibold tabular-nums text-neutral-900">
+                    {{ formatDuration(entry) }}
+                </div>
+                <div class="text-xs tabular-nums text-neutral-400">
+                    {{ formatTime(entry.startedAt) }} – {{ entry.stoppedAt ? formatTime(entry.stoppedAt) : '...' }}
+                </div>
+            </div>
+
+            <!-- Date -->
+            <div class="hidden shrink-0 text-xs text-neutral-400 sm:block">
+                {{ formatDate(entry.startedAt) }}
+            </div>
+
+            <!-- Delete action -->
+            <MalioButtonIcon
+                icon="mdi:delete-outline"
+                :aria-label="$t('common.delete')"
+                variant="ghost"
+                icon-size="18"
+                button-class="shrink-0 text-neutral-300 opacity-0 hover:bg-red-50 hover:text-red-500 group-hover:opacity-100"
+                @click.stop="emit('deleteEntry', entry)"
+            />
+        </div>
+    </div>
+</template>
+
+<script setup lang="ts">
+import type { TimeEntry } from '~/modules/time-tracking/services/dto/time-entry'
+import { stripRichText } from '~/utils/format'
+
+const props = defineProps<{
+    entries: TimeEntry[]
+}>()
+
+const emit = defineEmits<{
+    (e: 'editEntry', entry: TimeEntry): void
+    (e: 'deleteEntry', entry: TimeEntry): void
+}>()
+
+const sortedEntries = computed(() => {
+    return [...props.entries].sort((a, b) => {
+        return new Date(b.startedAt).getTime() - new Date(a.startedAt).getTime()
+    })
+})
+
+function formatDuration(entry: TimeEntry): string {
+    const start = new Date(entry.startedAt).getTime()
+    const end = entry.stoppedAt ? new Date(entry.stoppedAt).getTime() : Date.now()
+    const diff = end - start
+    const h = Math.floor(diff / 3600000)
+    const m = Math.floor((diff % 3600000) / 60000)
+    return m > 0 ? `${h}h${String(m).padStart(2, '0')}` : `${h}h`
+}
+
+function formatTime(iso: string): string {
+    const d = new Date(iso)
+    return d.toLocaleTimeString('fr-FR', { hour: '2-digit', minute: '2-digit' })
+}
+
+function formatDate(iso: string): string {
+    const d = new Date(iso)
+    return d.toLocaleDateString('fr-FR', { weekday: 'short', day: 'numeric', month: 'short' })
+}
+</script>