feat : add export button to time-tracking page

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

frontend/pages/time-tracking.vue

@@ -75,6 +75,14 @@
                         text-value="text-sm"
                     />
                 </div>
+
+                <button
+                    class="flex shrink-0 items-center gap-2 rounded-md border border-neutral-200 bg-white px-3 py-2 text-sm font-medium text-neutral-700 hover:bg-neutral-50 transition"
+                    @click="exportTimeEntries"
+                >
+                    <Icon name="mdi:download" size="18" />
+                    {{ $t('timeEntries.export') }}
+                </button>
             </div>
         </div>
 
@@ -297,6 +305,40 @@ async function onDelete(entry: TimeEntry) {
     await loadEntries()
 }
 
+function getExportDateRange(): { after: string, before: string } {
+    if (Array.isArray(selectedDateFilter.value) && selectedDateFilter.value.length === 2) {
+        return {
+            after: selectedDateFilter.value[0].toISOString().slice(0, 10),
+            before: selectedDateFilter.value[1].toISOString().slice(0, 10),
+        }
+    }
+    const end = new Date(startDate.value)
+    end.setDate(end.getDate() + (viewMode.value === 'day' ? 1 : 7))
+    return {
+        after: startDate.value.toISOString().slice(0, 10),
+        before: end.toISOString().slice(0, 10),
+    }
+}
+
+function exportTimeEntries() {
+    const { after, before } = getExportDateRange()
+
+    const url = timeEntryService.getExportUrl({
+        after,
+        before,
+        user: selectedUserId.value ?? undefined,
+        project: selectedProjectId.value ?? undefined,
+        tags: selectedTagId.value ? [selectedTagId.value] : undefined,
+    })
+
+    const a = document.createElement('a')
+    a.href = url
+    a.download = ''
+    document.body.appendChild(a)
+    a.click()
+    document.body.removeChild(a)
+}
+
 async function loadEntries() {
     const end = new Date(startDate.value)
     end.setDate(end.getDate() + (viewMode.value === 'day' ? 1 : 7))