feat: dashboard Second Brain, essai 7 jours et vérification e-mail

Rendre le dashboard actionnable (inbox, peek, carte mentale), aligner la facturation sur l’essai 7 jours, et bloquer le login e-mail tant que l’adresse n’est pas confirmée.

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

memento-note/components/interactive-page/interactive-page-publish-dialog.tsx

@@ -141,12 +141,12 @@ export function InteractivePagePublishDialog({
       setProgress(null)
       return
     }
-    // Guard: empty content from editor race
+    // Guard: empty content from editor race (aligned with API min 40 words)
     const wordCount = content
       .replace(/<[^>]+>/g, ' ')
       .split(/\s+/)
       .filter(Boolean).length
-    if (wordCount < 30) {
+    if (wordCount < 40) {
       setPhase('error')
       setError(
         t('richTextEditor.publishInteractivePageTooShort') ||