correction page quizzes2

app/dashboard/quizzes/page.tsx

@@ -1,53 +1,71 @@
 /* eslint-disable @typescript-eslint/no-explicit-any */
+import { redirect } from 'next/navigation'
 import { createClient } from '@/lib/supabase/server'
 import QuizzesClient from './QuizzesClient'
 
 export default async function QuizzesPage() {
-  const supabase = await createClient()
-  const db = supabase as any
-  const { data: { user } } = await supabase.auth.getUser()
+  try {
+    const supabase = await createClient()
+    const db = supabase as any
 
-  const { data: categories } = await db
-    .from('categories')
-    .select(`id, name, description, subchapters(id, name, quizzes(id, title, updated_at))`)
-    .order('name')
+    const { data: { user }, error: authError } = await supabase.auth.getUser()
+    if (authError || !user) redirect('/login')
 
-  const { count: totalQuizzes } = await db
-    .from('quizzes')
-    .select('id', { count: 'exact', head: true })
-    .eq('author_id', user!.id)
-
-  const { data: sessionIds } = await db
-    .from('sessions')
-    .select('id')
-    .eq('trainer_id', user!.id)
-
-  const ids = (sessionIds ?? []).map((s: any) => s.id)
-  const { count: totalStudents } = ids.length > 0
-    ? await db
-        .from('student_participations')
+    const [
+      { data: categories },
+      { count: totalQuizzes },
+      { data: sessionIds },
+    ] = await Promise.all([
+      db
+        .from('categories')
+        .select('id, name, description, subchapters(id, name, quizzes(id, title, updated_at))')
+        .order('name'),
+      db
+        .from('quizzes')
         .select('id', { count: 'exact', head: true })
-        .in('session_id', ids)
-    : { count: 0 }
+        .eq('author_id', user.id),
+      db
+        .from('sessions')
+        .select('id')
+        .eq('trainer_id', user.id),
+    ])
 
-  // Supabase peut retourner `quizzes: null` quand un sous-chapitre n'a aucun quiz —
-  // on normalise en tableau vide pour éviter les crash .length côté client.
-  const normalizedCategories = (categories ?? []).map((cat: any) => ({
-    ...cat,
-    subchapters: (cat.subchapters ?? []).map((sub: any) => ({
-      ...sub,
-      quizzes: sub.quizzes ?? [],
-    })),
-  }))
+    const ids = (sessionIds ?? []).map((s: any) => s.id)
+    const { count: totalStudents } = ids.length > 0
+      ? await db
+          .from('student_participations')
+          .select('id', { count: 'exact', head: true })
+          .in('session_id', ids)
+      : { count: 0 }
 
-  return (
-    <QuizzesClient
-      initialCategories={normalizedCategories}
-      stats={{
-        totalQuizzes: totalQuizzes ?? 0,
-        totalCategories: categories?.length ?? 0,
-        activeStudents: totalStudents ?? 0,
-      }}
-    />
-  )
+    // Supabase retourne `quizzes: null` (pas `[]`) quand un sous-chapitre n'a
+    // aucun quiz — on normalise pour éviter les crash .length côté client.
+    const normalizedCategories = (categories ?? []).map((cat: any) => ({
+      ...cat,
+      subchapters: (cat.subchapters ?? []).map((sub: any) => ({
+        ...sub,
+        quizzes: Array.isArray(sub.quizzes) ? sub.quizzes : [],
+      })),
+    }))
+
+    return (
+      <QuizzesClient
+        initialCategories={normalizedCategories}
+        stats={{
+          totalQuizzes: totalQuizzes ?? 0,
+          totalCategories: normalizedCategories.length,
+          activeStudents: totalStudents ?? 0,
+        }}
+      />
+    )
+  } catch (err) {
+    console.error('[QuizzesPage]', err)
+    // Renvoie une page vide plutôt qu'un 500 nu
+    return (
+      <QuizzesClient
+        initialCategories={[]}
+        stats={{ totalQuizzes: 0, totalCategories: 0, activeStudents: 0 }}
+      />
+    )
+  }
 }