fix(admin): migration Subscription/BYOK et repli getUsers

La table Subscription était dans le schéma sans migration SQL, ce qui
cassait le rendu Server Components de /admin. Migration idempotente +
fallback getUsers si la jointure échoue encore.

Co-authored-by: Cursor <cursoragent@cursor.com>

memento-note/app/actions/admin.ts

@@ -23,9 +23,31 @@ async function checkAdmin() {
   return session
 }
 
+const userListSelect = {
+  id: true,
+  name: true,
+  email: true,
+  role: true,
+  createdAt: true,
+  subscription: {
+    select: {
+      tier: true,
+      status: true,
+      currentPeriodEnd: true,
+    },
+  },
+} as const
+
 export async function getUsers() {
   await checkAdmin()
   try {
+    return await prisma.user.findMany({
+      orderBy: { createdAt: 'desc' },
+      select: userListSelect,
+    })
+  } catch (error) {
+    // Prod DB parfois en retard sur les migrations (ex. table Subscription absente).
+    console.error('getUsers with subscription failed, fallback without:', error)
     const users = await prisma.user.findMany({
       orderBy: { createdAt: 'desc' },
       select: {
@@ -34,19 +56,9 @@ export async function getUsers() {
         email: true,
         role: true,
         createdAt: true,
-        subscription: {
-          select: {
-            tier: true,
-            status: true,
-            currentPeriodEnd: true,
-          }
-        }
-      }
+      },
     })
-    return users
-  } catch (error) {
-    console.error('Failed to fetch users:', error)
-    throw new Error('Failed to fetch users')
+    return users.map((u) => ({ ...u, subscription: null }))
   }
 }