feat(frontend) : add document upload, list and preview components

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

frontend/components/task/TaskDocumentList.vue

@@ -0,0 +1,79 @@
+<template>
+    <div v-if="documents.length" class="mt-3">
+        <p class="mb-2 text-sm font-medium text-neutral-700">
+            {{ $t('taskDocuments.title') }} ({{ documents.length }})
+        </p>
+        <div class="grid grid-cols-2 gap-2 sm:grid-cols-3">
+            <div
+                v-for="doc in documents"
+                :key="doc.id"
+                class="group relative flex cursor-pointer items-center gap-2 rounded-lg border border-neutral-200 p-2 transition-colors hover:bg-neutral-50"
+                @click="$emit('preview', doc)"
+            >
+                <!-- Thumbnail or icon -->
+                <div class="flex h-10 w-10 shrink-0 items-center justify-center overflow-hidden rounded">
+                    <img
+                        v-if="isImage(doc.mimeType)"
+                        :src="getDownloadUrl(doc.id)"
+                        :alt="doc.originalName"
+                        class="h-10 w-10 object-cover"
+                    />
+                    <Icon
+                        v-else
+                        :name="getIconForMime(doc.mimeType)"
+                        class="h-6 w-6 text-neutral-400"
+                    />
+                </div>
+
+                <!-- File info -->
+                <div class="min-w-0 flex-1">
+                    <p class="truncate text-xs font-medium text-neutral-700">{{ doc.originalName }}</p>
+                    <p class="text-xs text-neutral-400">{{ formatSize(doc.size) }}</p>
+                </div>
+
+                <!-- Delete button -->
+                <button
+                    v-if="isAdmin"
+                    class="absolute right-1 top-1 hidden rounded p-0.5 text-neutral-400 transition-colors hover:bg-red-50 hover:text-red-500 group-hover:block"
+                    @click.stop="$emit('delete', doc)"
+                >
+                    <Icon name="heroicons:x-mark" class="h-4 w-4" />
+                </button>
+            </div>
+        </div>
+    </div>
+</template>
+
+<script setup lang="ts">
+import type { TaskDocument } from '~/services/dto/task-document'
+
+defineProps<{
+    documents: TaskDocument[]
+    isAdmin: boolean
+}>()
+
+defineEmits<{
+    preview: [doc: TaskDocument]
+    delete: [doc: TaskDocument]
+}>()
+
+const { getDownloadUrl } = useTaskDocumentService()
+
+function isImage(mimeType: string): boolean {
+    return mimeType.startsWith('image/')
+}
+
+function getIconForMime(mimeType: string): string {
+    if (mimeType === 'application/pdf') return 'heroicons:document-text'
+    if (mimeType.includes('spreadsheet') || mimeType.includes('excel')) return 'heroicons:table-cells'
+    if (mimeType.includes('word') || mimeType.includes('document')) return 'heroicons:document'
+    if (mimeType.includes('zip') || mimeType.includes('archive') || mimeType.includes('tar') || mimeType.includes('rar')) return 'heroicons:archive-box'
+    return 'heroicons:paper-clip'
+}
+
+function formatSize(bytes: number): string {
+    if (bytes < 1024) return `${bytes} o`
+    if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(0)} Ko`
+    return `${(bytes / (1024 * 1024)).toFixed(1)} Mo`
+}
+</script>