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/common/StatusBadge.vue

@@ -0,0 +1,61 @@
+<script setup lang="ts">
+const props = defineProps<{
+  status: string
+  type?: 'document' | 'decision' | 'mandate' | 'version' | 'vote'
+}>()
+
+const statusConfig: Record<string, Record<string, { color: string; label: string }>> = {
+  document: {
+    draft: { color: 'warning', label: 'Brouillon' },
+    active: { color: 'success', label: 'Actif' },
+    archived: { color: 'neutral', label: 'Archive' },
+  },
+  version: {
+    proposed: { color: 'info', label: 'Propose' },
+    voting: { color: 'warning', label: 'En vote' },
+    accepted: { color: 'success', label: 'Accepte' },
+    rejected: { color: 'error', label: 'Rejete' },
+  },
+  decision: {
+    draft: { color: 'warning', label: 'Brouillon' },
+    qualification: { color: 'info', label: 'Qualification' },
+    review: { color: 'info', label: 'Revue' },
+    voting: { color: 'primary', label: 'En vote' },
+    executed: { color: 'success', label: 'Execute' },
+    closed: { color: 'neutral', label: 'Clos' },
+  },
+  mandate: {
+    draft: { color: 'warning', label: 'Brouillon' },
+    candidacy: { color: 'info', label: 'Candidature' },
+    voting: { color: 'primary', label: 'En vote' },
+    active: { color: 'success', label: 'Actif' },
+    reporting: { color: 'info', label: 'Rapport' },
+    completed: { color: 'neutral', label: 'Termine' },
+    revoked: { color: 'error', label: 'Revoque' },
+  },
+  vote: {
+    open: { color: 'success', label: 'Ouvert' },
+    closed: { color: 'warning', label: 'Ferme' },
+    tallied: { color: 'neutral', label: 'Depouille' },
+  },
+}
+
+const resolved = computed(() => {
+  const typeKey = props.type || 'document'
+  const typeMap = statusConfig[typeKey]
+  if (typeMap && typeMap[props.status]) {
+    return typeMap[props.status]
+  }
+  return { color: 'neutral', label: props.status }
+})
+</script>
+
+<template>
+  <UBadge
+    :color="(resolved.color as any)"
+    variant="subtle"
+    size="xs"
+  >
+    {{ resolved.label }}
+  </UBadge>
+</template>