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/sanctuary/SanctuaryEntry.vue

@@ -0,0 +1,171 @@
+<script setup lang="ts">
+export interface SanctuaryEntryOut {
+  id: string
+  entry_type: string
+  reference_id: string
+  title: string | null
+  content_hash: string
+  ipfs_cid: string | null
+  chain_tx_hash: string | null
+  chain_block: number | null
+  metadata_json: string | null
+  created_at: string
+}
+
+const props = defineProps<{
+  entry: SanctuaryEntryOut
+}>()
+
+const emit = defineEmits<{
+  verify: [id: string]
+}>()
+
+const typeLabel = (entryType: string): string => {
+  switch (entryType) {
+    case 'document': return 'Document'
+    case 'decision': return 'Decision'
+    case 'vote_result': return 'Resultat de vote'
+    default: return entryType
+  }
+}
+
+const typeColor = (entryType: string): string => {
+  switch (entryType) {
+    case 'document': return 'primary'
+    case 'decision': return 'success'
+    case 'vote_result': return 'info'
+    default: return 'neutral'
+  }
+}
+
+function formatDate(dateStr: string): string {
+  return new Date(dateStr).toLocaleDateString('fr-FR', {
+    day: 'numeric',
+    month: 'long',
+    year: 'numeric',
+    hour: '2-digit',
+    minute: '2-digit',
+  })
+}
+
+function truncateHash(hash: string | null, length: number = 16): string {
+  if (!hash) return '-'
+  if (hash.length <= length * 2) return hash
+  return hash.slice(0, length) + '...' + hash.slice(-8)
+}
+
+const copied = ref(false)
+
+async function copyHash() {
+  try {
+    await navigator.clipboard.writeText(props.entry.content_hash)
+    copied.value = true
+    setTimeout(() => { copied.value = false }, 2000)
+  } catch {
+    // Clipboard API not available
+  }
+}
+</script>
+
+<template>
+  <UCard
+    class="cursor-pointer hover:ring-2 hover:ring-primary/50 transition-all"
+    @click="navigateTo(`/sanctuary/${entry.id}`)"
+  >
+    <div class="space-y-4">
+      <!-- Entry header -->
+      <div class="flex items-start justify-between">
+        <div class="flex items-center gap-3">
+          <UIcon name="i-lucide-shield-check" class="text-xl text-primary" />
+          <div>
+            <h3 class="font-semibold text-gray-900 dark:text-white">
+              {{ entry.title || 'Entree sans titre' }}
+            </h3>
+            <p class="text-xs text-gray-500">
+              {{ formatDate(entry.created_at) }}
+            </p>
+          </div>
+        </div>
+        <UBadge :color="(typeColor(entry.entry_type) as any)" variant="subtle" size="xs">
+          {{ typeLabel(entry.entry_type) }}
+        </UBadge>
+      </div>
+
+      <!-- Hashes and anchors -->
+      <div class="grid grid-cols-1 md:grid-cols-3 gap-4">
+        <!-- Content hash -->
+        <div class="p-3 bg-gray-50 dark:bg-gray-800/50 rounded-lg">
+          <div class="flex items-center justify-between mb-1">
+            <div class="flex items-center gap-2">
+              <UIcon name="i-lucide-hash" class="text-gray-400 text-sm" />
+              <span class="text-xs font-semibold text-gray-500 uppercase">SHA-256</span>
+            </div>
+            <UButton
+              :icon="copied ? 'i-lucide-check' : 'i-lucide-copy'"
+              variant="ghost"
+              color="neutral"
+              size="xs"
+              class="p-0"
+              @click.stop="copyHash"
+            />
+          </div>
+          <p class="font-mono text-xs text-gray-700 dark:text-gray-300 break-all">
+            {{ truncateHash(entry.content_hash) }}
+          </p>
+        </div>
+
+        <!-- IPFS CID -->
+        <div class="p-3 bg-gray-50 dark:bg-gray-800/50 rounded-lg">
+          <div class="flex items-center gap-2 mb-1">
+            <UIcon name="i-lucide-hard-drive" class="text-gray-400 text-sm" />
+            <span class="text-xs font-semibold text-gray-500 uppercase">IPFS CID</span>
+          </div>
+          <div @click.stop>
+            <SanctuaryIPFSLink :cid="entry.ipfs_cid" />
+          </div>
+        </div>
+
+        <!-- Chain anchor -->
+        <div class="p-3 bg-gray-50 dark:bg-gray-800/50 rounded-lg">
+          <div class="flex items-center gap-2 mb-1">
+            <UIcon name="i-lucide-link" class="text-gray-400 text-sm" />
+            <span class="text-xs font-semibold text-gray-500 uppercase">On-chain</span>
+          </div>
+          <SanctuaryChainAnchor :tx-hash="entry.chain_tx_hash" :block="entry.chain_block" />
+        </div>
+      </div>
+
+      <!-- Verification status indicators -->
+      <div class="flex items-center justify-between">
+        <div class="flex items-center gap-4 text-xs">
+          <div class="flex items-center gap-1">
+            <UIcon
+              :name="entry.ipfs_cid ? 'i-lucide-check-circle' : 'i-lucide-clock'"
+              :class="entry.ipfs_cid ? 'text-green-500' : 'text-gray-400'"
+            />
+            <span :class="entry.ipfs_cid ? 'text-green-600' : 'text-gray-400'">
+              IPFS {{ entry.ipfs_cid ? 'epingle' : 'en attente' }}
+            </span>
+          </div>
+          <div class="flex items-center gap-1">
+            <UIcon
+              :name="entry.chain_tx_hash ? 'i-lucide-check-circle' : 'i-lucide-clock'"
+              :class="entry.chain_tx_hash ? 'text-green-500' : 'text-gray-400'"
+            />
+            <span :class="entry.chain_tx_hash ? 'text-green-600' : 'text-gray-400'">
+              Chain {{ entry.chain_tx_hash ? 'ancre' : 'en attente' }}
+            </span>
+          </div>
+        </div>
+        <UButton
+          label="Verifier"
+          icon="i-lucide-shield-check"
+          variant="soft"
+          color="primary"
+          size="xs"
+          @click.stop="emit('verify', entry.id)"
+        />
+      </div>
+    </div>
+  </UCard>
+</template>