Refactoring complet : contenu livre, config unique, routes, admin et light mode

- Source unique : supprime app/data/librodrome.config.yml, renomme site/ en bookplayer.config.yml
- Morceaux : renommés avec slugs lisibles, fichiers audio renommés, inversion ch2↔ch3 corrigée
- Chapitres : 11 fichiers .md réécrits avec le vrai contenu du livre (synthèse fidèle du PDF)
- Routes : /lire → /modele-eco, /ecouter → /en-musique, redirections 301
- Admin chapitres : champs structurés (titre, description, temps lecture), compteur mots
- Éditeur markdown : mode split, plein écran, support Tab, meilleur rendu aperçu
- Admin morceaux : drag & drop, ajout/suppression, gestion playlist
- Light mode : palettes printemps/été plus saturées et contrastées, teintes primary
- Raccourcis clavier player : espace, flèches gauche/droite
- Paroles : toggle supprimé, toujours visibles et scrollables
- Nouvelles pages : autonomie, evenement

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

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

@@ -6,24 +6,36 @@
           ← Chapitres
         </NuxtLink>
         <h1 class="font-display text-2xl font-bold text-white mt-1">
-          {{ chapter?.slug }}
+          {{ chapterTitle || slug }}
         </h1>
+        <span class="text-xs text-white/30 font-mono">{{ slug }}</span>
+      </div>
+      <div class="flex items-center gap-3">
+        <span v-if="wordCount" class="text-xs text-white/30">{{ wordCount }} mots</span>
+        <AdminSaveButton :saving="saving" :saved="saved" @save="save" />
       </div>
-      <AdminSaveButton :saving="saving" :saved="saved" @save="save" />
     </div>
 
     <template v-if="chapter">
-      <AdminFormSection title="Frontmatter" open>
-        <textarea
-          v-model="frontmatter"
-          class="fm-textarea"
-          rows="6"
-          spellcheck="false"
-        />
+      <AdminFormSection title="Métadonnées">
+        <div class="grid gap-3 sm:grid-cols-2">
+          <div>
+            <label class="field-label">Titre</label>
+            <input v-model="title" class="field-input" placeholder="Titre du chapitre" />
+          </div>
+          <div>
+            <label class="field-label">Temps de lecture</label>
+            <input v-model="readingTime" class="field-input" placeholder="15 min" />
+          </div>
+          <div class="sm:col-span-2">
+            <label class="field-label">Description</label>
+            <input v-model="description" class="field-input" placeholder="Description courte pour le SEO" />
+          </div>
+        </div>
       </AdminFormSection>
 
-      <AdminFormSection title="Contenu Markdown" open>
-        <AdminMarkdownEditor v-model="body" :rows="30" />
+      <AdminFormSection title="Contenu" open>
+        <AdminMarkdownEditor v-model="body" :rows="35" />
       </AdminFormSection>
     </template>
   </div>
@@ -40,16 +52,33 @@ const slug = computed(() => route.params.slug as string)
 
 const { data: chapter } = await useFetch(() => `/api/admin/chapters/${slug.value}`)
 
-const frontmatter = ref('')
+const title = ref('')
+const description = ref('')
+const readingTime = ref('')
 const body = ref('')
 
+const chapterTitle = computed(() => title.value)
+const wordCount = computed(() => {
+  if (!body.value) return 0
+  return body.value.trim().split(/\s+/).filter(Boolean).length
+})
+
 watch(chapter, (val) => {
   if (val) {
-    frontmatter.value = val.frontmatter ?? ''
+    // Parse frontmatter fields
+    const fm = val.frontmatter ?? ''
+    title.value = extractFmField(fm, 'title')
+    description.value = extractFmField(fm, 'description')
+    readingTime.value = extractFmField(fm, 'readingTime')
     body.value = val.body ?? ''
   }
 }, { immediate: true })
 
+function extractFmField(fm: string, field: string): string {
+  const match = fm.match(new RegExp(`^${field}:\\s*"?([^"\\n]*)"?`, 'm'))
+  return match ? match[1].trim() : ''
+}
+
 const saving = ref(false)
 const saved = ref(false)
 
@@ -57,12 +86,17 @@ async function save() {
   saving.value = true
   saved.value = false
   try {
+    const order = chapter.value?.frontmatter?.match(/order:\s*(\d+)/)?.[1] ?? '1'
+    const frontmatter = [
+      `title: "${title.value}"`,
+      `description: "${description.value}"`,
+      `order: ${order}`,
+      `readingTime: "${readingTime.value}"`,
+    ].join('\n')
+
     await $fetch(`/api/admin/chapters/${slug.value}`, {
       method: 'PUT',
-      body: {
-        frontmatter: frontmatter.value,
-        body: body.value,
-      },
+      body: { frontmatter, body: body.value },
     })
     saved.value = true
     setTimeout(() => { saved.value = false }, 2000)
@@ -74,20 +108,24 @@ async function save() {
 </script>
 
 <style scoped>
-.fm-textarea {
-  width: 100%;
-  padding: 0.75rem;
-  border: 1px solid hsl(20 8% 18%);
-  border-radius: 0.5rem;
-  background: hsl(20 8% 4%);
-  color: hsl(36 80% 76%);
-  font-family: var(--font-mono, monospace);
-  font-size: 0.85rem;
-  line-height: 1.7;
-  resize: vertical;
+.field-label {
+  display: block;
+  font-size: 0.75rem;
+  color: hsl(20 8% 50%);
+  margin-bottom: 0.25rem;
 }
 
-.fm-textarea:focus {
+.field-input {
+  width: 100%;
+  padding: 0.5rem 0.625rem;
+  border-radius: 0.375rem;
+  border: 1px solid hsl(20 8% 18%);
+  background: hsl(20 8% 6%);
+  color: white;
+  font-size: 0.85rem;
+}
+
+.field-input:focus {
   outline: none;
   border-color: hsl(12 76% 48% / 0.5);
 }