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/note-editor/note-editor-split-peek.tsx

@@ -2,7 +2,7 @@
 
 import { useEffect, useRef } from 'react'
 import { motion } from 'framer-motion'
-import { X, Maximize2 } from 'lucide-react'
+import { X, Maximize2, LayoutGrid } from 'lucide-react'
 import type { Note } from '@/lib/types'
 import { useLanguage } from '@/lib/i18n'
 import { NoteEditorProvider, useNoteEditorContext } from './note-editor-context'
@@ -17,6 +17,7 @@ interface NoteEditorSplitPeekProps {
   blockId?: string
   onClose: () => void
   onOpenFully: () => void
+  onBackToDashboard?: () => void
 }
 
 function PeekEditorBody({ blockId }: { blockId?: string }) {
@@ -54,7 +55,7 @@ function PeekEditorBody({ blockId }: { blockId?: string }) {
   )
 }
 
-export function NoteEditorSplitPeek({ note, blockId, onClose, onOpenFully }: NoteEditorSplitPeekProps) {
+export function NoteEditorSplitPeek({ note, blockId, onClose, onOpenFully, onBackToDashboard }: NoteEditorSplitPeekProps) {
   const { t, language } = useLanguage()
   const isRtl = language === 'fa' || language === 'ar'
 
@@ -77,6 +78,16 @@ export function NoteEditorSplitPeek({ note, blockId, onClose, onOpenFully }: Not
             {t('notePeek.label')}
           </span>
           <div className="flex items-center gap-1 shrink-0">
+            {onBackToDashboard && (
+              <button
+                type="button"
+                onClick={onBackToDashboard}
+                className="inline-flex items-center gap-1.5 px-2.5 py-1.5 rounded-lg text-[10px] font-bold uppercase tracking-wide text-ink dark:text-dark-ink hover:bg-black/5 dark:hover:bg-white/5 transition-colors"
+              >
+                <LayoutGrid size={12} />
+                {t('notes.backToDashboard')}
+              </button>
+            )}
             <button
               type="button"
               onClick={onOpenFully}