fix(chart): improve error handling and color variety

- Add quotaExceeded flag to response for better error UX
- Show dedicated quota exceeded state with upgrade button
- Improve AI prompt to better detect data patterns
- Add chart type-specific colors (blue, indigo, emerald, violet, etc.)
- Replace generic primary/10 colors with varied accent colors

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

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

@@ -13,6 +13,7 @@ export interface ToolContext {
   actionId?: string
   conversationId?: string
   notebookId?: string
+  noteId?: string
   webSearch?: boolean
   config: Record<string, string>
 }