feat: IA Note — rename panel, add Resource tab + chat hover-actions

- Renamed 'AI Copilot' / 'Assistant IA' → 'IA Note' everywhere in UI
- Added 3rd 'Ressource' tab in IA Note panel with:
  * Optional URL field that scrapes page text (via new scrapePageText action)
  * Textarea for paste (markdown, HTML, plain text)
  * 3 integration modes: Remplacer / Compléter (AI) / Fusionner (AI)
  * Dual-format preview: Rendu + Markdown brut before applying
- Added hover-actions on assistant chat messages:
  * Remplacer / Compléter / Fusionner appear on hover
  * Triggers same preview/apply flow via resource tab
- New API route: POST /api/ai/enrich-from-resource
  * Supports complete and merge modes with language-aware prompts
- Extended scrape.ts with scrapePageText() (full content extraction)

memento-note/components/note-inline-editor.tsx

@@ -552,11 +552,11 @@ export function NoteInlineEditor({
             <Button variant="ghost" size="sm"
               className={cn('h-8 gap-1.5 px-2 text-xs font-medium transition-colors', aiOpen && 'bg-primary/10 text-primary')}
               onClick={() => setAiOpen(!aiOpen)}
-              title={t('ai.aiCopilot')}>
+              title="IA Note">
               {isProcessingAI
                 ? <Loader2 className="h-3.5 w-3.5 animate-spin" />
                 : <Sparkles className="h-3.5 w-3.5" />}
-              <span className="hidden sm:inline">{t('ai.aiCopilot')}</span>
+              <span className="hidden sm:inline">IA Note</span>
             </Button>
           )}