Admin : déroulant sommaire PDF par chapitre, transitions pages, URL GrateWizard

- Ajout API /api/admin/pdf-outline (extraction sommaire PDF côté serveur via pdfjs-dist)
- Déroulant <select> dans chaque ligne de chapitre admin avec les 61 titres/sous-titres du PDF
- Sauvegarde des associations chapitre→page PDF via config YAML
- Transition douce (fondu 1s/1.2s) pour le changement de pages dans le viewer PDF
- Correction des numéros de pages réels dans chapterPages (extraits du sommaire PDF)
- URL GrateWizard prod → gratewizard.axiom-team.fr

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

app/pages/admin/book/index.vue

@@ -17,7 +17,7 @@
             placeholder="/pdf/une-economie-du-don.pdf"
           />
         </div>
-        <button class="save-pdf-btn" @click="savePdfPath" :disabled="savingPdf">
+        <button class="save-pdf-btn" @click="savePdfConfig" :disabled="savingPdf">
           <div v-if="savingPdf" class="i-lucide-loader-2 h-3.5 w-3.5 animate-spin" />
           <div v-else-if="savedPdf" class="i-lucide-check h-3.5 w-3.5" />
           <div v-else class="i-lucide-save h-3.5 w-3.5" />
@@ -59,6 +59,20 @@
             >{{ name }}</span>
           </div>
         </div>
+        <select
+          v-if="pdfOutline.length"
+          class="page-select"
+          :value="getChapterPage(chapter.slug) ?? ''"
+          @change="setChapterPage(chapter.slug, ($event.target as HTMLSelectElement).value)"
+        >
+          <option value="">— Page PDF —</option>
+          <option
+            v-for="entry in pdfOutline"
+            :key="`${entry.page}-${entry.title}`"
+            :value="entry.page"
+          >{{ '\u00A0\u00A0'.repeat(entry.level) }}{{ entry.title }} (p.{{ entry.page }})</option>
+        </select>
+        <span v-else class="text-xs text-white/30">…</span>
         <button
           class="delete-btn"
           @click="removeChapter(chapter.slug)"
@@ -115,25 +129,54 @@ const saved = ref(false)
 const newTitle = ref('')
 const newSlug = ref('')
 
-// PDF path
+// PDF path + outline
 const pdfPath = ref(bookConfig.value?.book?.pdfFile ?? '/pdf/une-economie-du-don.pdf')
 const savingPdf = ref(false)
 const savedPdf = ref(false)
 
-async function savePdfPath() {
+const pdfOutline = ref<Array<{ title: string; page: number; level: number }>>([])
+
+
+const chapterPageMap = ref<Record<string, number | undefined>>({})
+if (bookConfig.value?.chapterPages) {
+  for (const cp of bookConfig.value.chapterPages) {
+    chapterPageMap.value[cp.chapterSlug] = cp.page
+  }
+}
+
+function getChapterPage(slug: string): number | undefined {
+  return chapterPageMap.value[slug]
+}
+
+function setChapterPage(slug: string, val: string) {
+  const num = parseInt(val, 10)
+  if (num > 0) chapterPageMap.value[slug] = num
+  else delete chapterPageMap.value[slug]
+}
+
+// Charger le sommaire PDF côté client via l'API serveur
+if (import.meta.client) {
+  $fetch<Array<{ title: string; page: number; level: number }>>('/api/admin/pdf-outline')
+    .then((data) => { pdfOutline.value = data })
+    .catch(() => {})
+}
+
+async function savePdfConfig() {
   if (!bookConfig.value) return
   savingPdf.value = true
   savedPdf.value = false
   try {
     bookConfig.value.book.pdfFile = pdfPath.value
+    bookConfig.value.chapterPages = Object.entries(chapterPageMap.value)
+      .filter(([, page]) => page != null)
+      .map(([chapterSlug, page]) => ({ chapterSlug, page }))
     await $fetch('/api/admin/content/config', {
       method: 'PUT',
       body: bookConfig.value,
     })
     savedPdf.value = true
     setTimeout(() => { savedPdf.value = false }, 2000)
-  }
-  finally {
+  } finally {
     savingPdf.value = false
   }
 }
@@ -310,6 +353,23 @@ async function removeChapter(slug: string) {
   border: 1px solid hsl(12 76% 48% / 0.2);
 }
 
+.page-select {
+  flex-shrink: 0;
+  max-width: 14rem;
+  padding: 0.25rem 0.4rem;
+  border-radius: 0.375rem;
+  border: 1px solid hsl(20 8% 18%);
+  background: hsl(20 8% 6%);
+  color: hsl(20 8% 65%);
+  font-size: 0.7rem;
+  cursor: pointer;
+}
+
+.page-select:focus {
+  outline: none;
+  border-color: hsl(12 76% 48% / 0.5);
+}
+
 .delete-btn {
   flex-shrink: 0;
   padding: 0.375rem;