feat(dashboard): tableau de bord Second Brain configurable avec chargement progressif

Briefing granulaire, pistes rapides puis enrichissement async, layout persisté v5,
suggestions agents, intégration Gmail et navigation sidebar alignée sur /home.

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

memento-note/components/tiptap-chart-extension.tsx

@@ -6,6 +6,7 @@ import { NoteChartFromCode } from './note-chart'
 import { useState } from 'react'
 import { Code, BarChart3, AlertCircle } from 'lucide-react'
 import { cn } from '@/lib/utils'
+import { useLanguage } from '@/lib/i18n'
 
 /**
  * ChartExtension - TipTap Node extension for rendering chart blocks
@@ -107,6 +108,7 @@ export const ChartExtension = Node.create({
  * - Error handling for invalid chart data
  */
 function ChartBlockView(props: any) {
+  const { t } = useLanguage()
   const [isEditing, setIsEditing] = useState(false)
   const [parseError, setParseError] = useState(false)
 
@@ -120,7 +122,7 @@ function ChartBlockView(props: any) {
       <NodeViewWrapper className="notion-chart-code-block my-4">
         <div className="flex items-center gap-2 px-3 py-2 bg-muted/50 rounded-t-lg border-b border-border">
           <Code className="w-4 h-4 text-muted-foreground" />
-          <span className="text-sm text-muted-foreground">Chart Code</span>
+          <span className="text-sm text-muted-foreground">{t('chart.code')}</span>
           <button
             onClick={() => setIsEditing(false)}
             className="ml-auto text-xs px-2 py-1 bg-primary text-primary-foreground rounded hover:opacity-90 transition-opacity"
@@ -144,8 +146,8 @@ function ChartBlockView(props: any) {
             <div className="flex items-center gap-3 text-muted-foreground">
               <AlertCircle className="w-5 h-5" />
               <div>
-                <p className="font-medium">Invalid Chart</p>
-                <p className="text-sm">This chart block contains invalid or empty data.</p>
+                <p className="font-medium">{t('chart.invalid')}</p>
+                <p className="text-sm">{t('chart.invalidDescription')}</p>
               </div>
             </div>
           </div>
@@ -158,7 +160,7 @@ function ChartBlockView(props: any) {
             'absolute top-2 right-2 p-2 rounded-lg bg-background/80 backdrop-blur border border-border shadow-sm opacity-0 group-hover:opacity-100 transition-opacity',
             'hover:bg-background hover:shadow-md'
           )}
-          title="Edit chart source"
+          title={t('chart.editSource')}
         >
           <Code className="w-4 h-4 text-muted-foreground" />
         </button>