Fix double-fire player, navigation par morceaux, admin labels morceaux

- BookPlayer : navigation par playlist (9 morceaux) au lieu de 11 chapitres
- stopPropagation clavier → plus de saut 1→3→5
- Sommaire aligné avec titres des morceaux
- Bouton back aligné avec clavier (toujours morceau précédent)
- Admin chapitres : tags morceaux cliquables avec étoile primary
- Admin liste chapitres : badges morceaux associés
- Éditeur markdown en vue split par défaut

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

app/pages/admin/book/[slug].vue

@@ -34,6 +34,36 @@
         </div>
       </AdminFormSection>
 
+      <AdminFormSection title="Morceaux associés">
+        <p class="text-xs text-white/40 mb-3">
+          Cliquez pour associer/dissocier. Cliquez sur l'étoile pour définir le morceau principal.
+        </p>
+        <div class="flex flex-wrap gap-2">
+          <div
+            v-for="song in allSongs"
+            :key="song.id"
+            class="song-tag"
+            :class="{
+              'song-tag--active': isLinked(song.id),
+              'song-tag--primary': isPrimary(song.id),
+            }"
+          >
+            <button
+              v-if="isLinked(song.id)"
+              class="song-star"
+              :class="{ 'song-star--active': isPrimary(song.id) }"
+              @click="setPrimary(song.id)"
+              aria-label="Définir comme principal"
+            >
+              <div class="i-lucide-star h-3 w-3" />
+            </button>
+            <button class="song-tag-label" @click="toggleSong(song.id)">
+              {{ song.title }}
+            </button>
+          </div>
+        </div>
+      </AdminFormSection>
+
       <AdminFormSection title="Contenu" open>
         <AdminMarkdownEditor v-model="body" :rows="35" />
       </AdminFormSection>
@@ -51,6 +81,7 @@ const route = useRoute()
 const slug = computed(() => route.params.slug as string)
 
 const { data: chapter } = await useFetch(() => `/api/admin/chapters/${slug.value}`)
+const { data: bookConfig } = await useFetch<any>('/api/content/config')
 
 const title = ref('')
 const description = ref('')
@@ -65,7 +96,6 @@ const wordCount = computed(() => {
 
 watch(chapter, (val) => {
   if (val) {
-    // Parse frontmatter fields
     const fm = val.frontmatter ?? ''
     title.value = extractFmField(fm, 'title')
     description.value = extractFmField(fm, 'description')
@@ -79,6 +109,52 @@ function extractFmField(fm: string, field: string): string {
   return match ? match[1].trim() : ''
 }
 
+// ── Morceaux associés ──
+const allSongs = computed(() => bookConfig.value?.songs ?? [])
+const linkedSongIds = ref<Set<string>>(new Set())
+const primarySongId = ref<string | null>(null)
+
+watch(bookConfig, (val) => {
+  if (!val) return
+  const links = (val.chapterSongs ?? []).filter(
+    (cs: any) => cs.chapterSlug === slug.value,
+  )
+  linkedSongIds.value = new Set(links.map((l: any) => l.songId))
+  const primary = links.find((l: any) => l.primary)
+  primarySongId.value = primary?.songId ?? null
+}, { immediate: true })
+
+function isLinked(songId: string) {
+  return linkedSongIds.value.has(songId)
+}
+
+function isPrimary(songId: string) {
+  return primarySongId.value === songId
+}
+
+function toggleSong(songId: string) {
+  const next = new Set(linkedSongIds.value)
+  if (next.has(songId)) {
+    next.delete(songId)
+    if (primarySongId.value === songId) primarySongId.value = null
+  }
+  else {
+    next.add(songId)
+    if (!primarySongId.value) primarySongId.value = songId
+  }
+  linkedSongIds.value = next
+}
+
+function setPrimary(songId: string) {
+  if (!linkedSongIds.value.has(songId)) {
+    const next = new Set(linkedSongIds.value)
+    next.add(songId)
+    linkedSongIds.value = next
+  }
+  primarySongId.value = songId
+}
+
+// ── Save ──
 const saving = ref(false)
 const saved = ref(false)
 
@@ -86,6 +162,7 @@ async function save() {
   saving.value = true
   saved.value = false
   try {
+    // 1. Sauvegarder le contenu du chapitre
     const order = chapter.value?.frontmatter?.match(/order:\s*(\d+)/)?.[1] ?? '1'
     const frontmatter = [
       `title: "${title.value}"`,
@@ -98,6 +175,27 @@ async function save() {
       method: 'PUT',
       body: { frontmatter, body: body.value },
     })
+
+    // 2. Sauvegarder les liaisons morceaux dans la config
+    if (bookConfig.value) {
+      const otherLinks = (bookConfig.value.chapterSongs ?? []).filter(
+        (cs: any) => cs.chapterSlug !== slug.value,
+      )
+      const newLinks = [...linkedSongIds.value].map(songId => ({
+        chapterSlug: slug.value,
+        songId,
+        primary: songId === primarySongId.value,
+      }))
+      const updatedConfig = {
+        ...bookConfig.value,
+        chapterSongs: [...otherLinks, ...newLinks],
+      }
+      await $fetch('/api/admin/content/config', {
+        method: 'PUT',
+        body: updatedConfig,
+      })
+    }
+
     saved.value = true
     setTimeout(() => { saved.value = false }, 2000)
   }
@@ -129,4 +227,70 @@ async function save() {
   outline: none;
   border-color: hsl(12 76% 48% / 0.5);
 }
+
+/* ── Song tags ── */
+.song-tag {
+  display: inline-flex;
+  align-items: center;
+  border-radius: 9999px;
+  border: 1px solid hsl(20 8% 22%);
+  transition: all 0.15s;
+  overflow: hidden;
+}
+
+.song-tag:hover {
+  border-color: hsl(12 76% 48% / 0.4);
+}
+
+.song-tag--active {
+  border-color: hsl(12 76% 48% / 0.6);
+  background: hsl(12 76% 48% / 0.08);
+}
+
+.song-tag--primary {
+  border-color: hsl(45 90% 55%);
+  background: hsl(45 90% 55% / 0.08);
+}
+
+.song-tag-label {
+  padding: 0.375rem 0.75rem;
+  background: none;
+  border: none;
+  color: hsl(20 8% 50%);
+  font-size: 0.8rem;
+  cursor: pointer;
+  transition: color 0.15s;
+}
+
+.song-tag--active .song-tag-label {
+  color: hsl(12 76% 68%);
+}
+
+.song-tag--primary .song-tag-label {
+  color: hsl(45 90% 65%);
+}
+
+.song-tag-label:hover {
+  color: white;
+}
+
+.song-star {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 0.375rem 0 0.375rem 0.625rem;
+  background: none;
+  border: none;
+  color: hsl(20 8% 30%);
+  cursor: pointer;
+  transition: color 0.15s;
+}
+
+.song-star:hover {
+  color: hsl(45 90% 55%);
+}
+
+.song-star--active {
+  color: hsl(45 90% 55%);
+}
 </style>