Sprint 2 : moteur de documents + sanctuaire

Backend:
- CRUD complet documents/items/versions (update, delete, accept, reject, reorder)
- Service IPFS (upload/retrieve/pin via kubo HTTP API)
- Service sanctuaire : pipeline SHA-256 + IPFS + on-chain (system.remark)
- Verification integrite des entrees sanctuaire
- Recherche par reference (document -> entrees sanctuaire)
- Serialisation deterministe des documents pour archivage
- 14 tests unitaires supplementaires (document service)

Frontend:
- 9 composants : StatusBadge, MarkdownRenderer, DiffView, ItemCard,
  ItemVersionDiff, DocumentList, SanctuaryEntry, IPFSLink, ChainAnchor
- Page detail item avec historique des versions et diff
- Page detail sanctuaire avec verification integrite
- Modal de creation de document + proposition de version
- Archivage document vers sanctuaire depuis la page detail

Documentation:
- API reference mise a jour (9 nouveaux endpoints)
- Guides utilisateur documents et sanctuaire enrichis

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

frontend/app/components/documents/DocumentList.vue

@@ -0,0 +1,88 @@
+<script setup lang="ts">
+import type { Document } from '~/stores/documents'
+
+const props = withDefaults(defineProps<{
+  documents: Document[]
+  loading?: boolean
+}>(), {
+  loading: false,
+})
+
+const typeLabel = (docType: string): string => {
+  switch (docType) {
+    case 'licence': return 'Licence'
+    case 'engagement': return 'Engagement'
+    case 'reglement': return 'Reglement'
+    case 'constitution': return 'Constitution'
+    default: return docType
+  }
+}
+
+function formatDate(dateStr: string): string {
+  return new Date(dateStr).toLocaleDateString('fr-FR', {
+    day: 'numeric',
+    month: 'short',
+    year: 'numeric',
+  })
+}
+</script>
+
+<template>
+  <!-- Loading state -->
+  <div v-if="loading" class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
+    <USkeleton v-for="i in 6" :key="i" class="h-48 w-full" />
+  </div>
+
+  <!-- Empty state -->
+  <UCard v-else-if="documents.length === 0">
+    <div class="text-center py-8">
+      <UIcon name="i-lucide-book-open" class="text-4xl text-gray-400 mb-3" />
+      <p class="text-gray-500">Aucun document de reference pour le moment</p>
+    </div>
+  </UCard>
+
+  <!-- Document grid -->
+  <div v-else class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
+    <UCard
+      v-for="doc in documents"
+      :key="doc.id"
+      class="cursor-pointer hover:ring-2 hover:ring-primary/50 transition-all"
+      @click="navigateTo(`/documents/${doc.slug}`)"
+    >
+      <div class="space-y-3">
+        <!-- Header -->
+        <div class="flex items-start justify-between">
+          <h3 class="font-semibold text-gray-900 dark:text-white text-sm leading-tight">
+            {{ doc.title }}
+          </h3>
+          <CommonStatusBadge :status="doc.status" type="document" />
+        </div>
+
+        <!-- Type + Version -->
+        <div class="flex items-center gap-2">
+          <UBadge variant="subtle" color="primary" size="xs">
+            {{ typeLabel(doc.doc_type) }}
+          </UBadge>
+          <span class="text-xs text-gray-500 font-mono">v{{ doc.version }}</span>
+        </div>
+
+        <!-- Description -->
+        <p
+          v-if="doc.description"
+          class="text-xs text-gray-600 dark:text-gray-400 line-clamp-2"
+        >
+          {{ doc.description }}
+        </p>
+
+        <!-- Footer -->
+        <div class="flex items-center justify-between pt-2 border-t border-gray-100 dark:border-gray-800">
+          <div class="flex items-center gap-1 text-xs text-gray-500">
+            <UIcon name="i-lucide-list" class="text-sm" />
+            <span>{{ doc.items_count }} items</span>
+          </div>
+          <span class="text-xs text-gray-400">{{ formatDate(doc.updated_at) }}</span>
+        </div>
+      </div>
+    </UCard>
+  </div>
+</template>