feat(frontend) : integrate documents into TaskModal

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

frontend/components/task/TaskModal.vue

@@ -121,6 +121,30 @@
                             />
                         </div>
 
+                        <!-- Documents -->
+                        <TaskDocumentUpload
+                            v-if="isEditing && task && isAdmin"
+                            :task-id="task.id"
+                            @uploaded="handleDocumentUploaded"
+                        />
+                        <TaskDocumentList
+                            v-if="isEditing && task"
+                            :documents="documents"
+                            :is-admin="isAdmin"
+                            @preview="openPreview"
+                            @delete="handleDeleteDocument"
+                        />
+
+                        <!-- Document preview modal -->
+                        <TaskDocumentPreview
+                            :document="previewDoc"
+                            :has-prev="previewIndex > 0"
+                            :has-next="previewIndex < documents.length - 1"
+                            @close="previewDoc = null"
+                            @prev="prevPreview"
+                            @next="nextPreview"
+                        />
+
                         <!-- Git section -->
                         <TaskGitSection
                             v-if="hasGitea && isEditing && task"
@@ -191,6 +215,7 @@
 
 <script setup lang="ts">
 import type { Task, TaskWrite } from '~/services/dto/task'
+import type { TaskDocument } from '~/services/dto/task-document'
 import { useGiteaService } from '~/services/gitea'
 import type { TaskStatus } from '~/services/dto/task-status'
 import type { TaskEffort } from '~/services/dto/task-effort'
@@ -339,6 +364,45 @@ watch(() => props.modelValue, async (open) => {
 })
 
 const { create, update, remove } = useTaskService()
+const { remove: removeDocument } = useTaskDocumentService()
+const { t } = useI18n()
+
+const authStore = useAuthStore()
+const isAdmin = computed(() => authStore.user?.roles?.includes('ROLE_ADMIN') ?? false)
+
+const documents = computed(() => props.task?.documents ?? [])
+const previewDoc = ref<TaskDocument | null>(null)
+
+const previewIndex = computed(() => {
+    if (!previewDoc.value) return -1
+    return documents.value.findIndex(d => d.id === previewDoc.value!.id)
+})
+
+function openPreview(doc: TaskDocument) {
+    previewDoc.value = doc
+}
+
+function prevPreview() {
+    if (previewIndex.value > 0) {
+        previewDoc.value = documents.value[previewIndex.value - 1]
+    }
+}
+
+function nextPreview() {
+    if (previewIndex.value < documents.value.length - 1) {
+        previewDoc.value = documents.value[previewIndex.value + 1]
+    }
+}
+
+async function handleDeleteDocument(doc: TaskDocument) {
+    if (!confirm(t('taskDocuments.confirmDeleteMessage'))) return
+    await removeDocument(doc.id)
+    emit('saved')
+}
+
+function handleDocumentUploaded() {
+    emit('saved')
+}
 
 async function handleDelete() {
     if (!props.task) return