feat: add inline chart support for notes

- Add NoteChart component using Recharts (bar, line, area, pie, radar, funnel, gauge)
- Add generate_chart and insert_chart_in_note AI tools
- Add chart code block support in MarkdownContent (```chart ... ```)
- Support JSON and simple data formats (label: value)
- Add i18n translations for chart features

Chart syntax examples:
- JSON: ```chart {"type":"bar","data":[{"label":"A","value":10}]} ```
- Simple: ```chart\nbar\nSales Data\nJan: 120\nFeb: 150\n```

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

memento-note/lib/ai/tools/registry.ts

@@ -52,7 +52,7 @@ class ToolRegistry {
    * When webOnly is true, only web tools are included (no note access).
    */
   buildToolsForChat(ctx: ToolContext & { webOnly?: boolean }): Record<string, any> {
-    const toolNames: string[] = ctx.webOnly ? [] : ['note_search', 'note_read', 'note_find_and_update', 'document_search', 'task_extract']
+    const toolNames: string[] = ctx.webOnly ? [] : ['note_search', 'note_read', 'note_find_and_update', 'document_search', 'task_extract', 'generate_chart', 'insert_chart_in_note']
 
     // Add web tools only when user toggled web search AND config is present
     if (ctx.webSearch) {