feat: add slides generation tool with multiple slide types

- Add slides.tool.ts with support for title, bullets, chart, stats, table, cards, timeline, quote, comparison, equation, image, summary slide types
- Chart types: bar, horizontal-bar, line, donut, radar
- Integrate with agent executor and canvas system
- Add multilingual support (en/fr)
- Various UI improvements and bug fixes

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

memento-note/lib/ai/tools/excalidraw.tool.ts

@@ -1183,6 +1183,19 @@ RULES:
           })
 
           console.log('[Excalidraw Tool] Canvas created:', canvas.id, canvas.name)
+
+          // Immediately mark the AgentAction as success so frontend polling unblocks
+          if (ctx.actionId) {
+            await prisma.agentAction.update({
+              where: { id: ctx.actionId },
+              data: {
+                status: 'success',
+                result: canvas.id,
+                log: `Diagram generated: ${elements.length} elements`,
+              },
+            }).catch(err => console.error('[Excalidraw Tool] Failed to update action status:', err))
+          }
+
           return {
             success: true, canvasId: canvas.id, canvasName: canvas.name,
             elementCount: elements.length,