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/app/api/brainstorm/[sessionId]/star/route.ts

@@ -0,0 +1,63 @@
+import { NextRequest, NextResponse } from 'next/server'
+import prisma from '@/lib/prisma'
+import { auth } from '@/auth'
+import { z } from 'zod'
+import { verifyParticipant } from '@/lib/brainstorm-collab'
+import { emitToSession } from '@/lib/socket-emit'
+
+const starSchema = z.object({
+  ideaId: z.string().min(1),
+})
+
+export async function POST(
+  request: NextRequest,
+  { params }: { params: Promise<{ sessionId: string }> }
+) {
+  const session = await auth()
+  if (!session?.user?.id) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
+  }
+
+  try {
+    const { sessionId } = await params
+    const body = await request.json()
+    const { ideaId } = starSchema.parse(body)
+
+    const brainstormSession = await prisma.brainstormSession.findFirst({
+      where: { id: sessionId },
+    })
+
+    if (!brainstormSession) {
+      return NextResponse.json({ error: 'Session not found' }, { status: 404 })
+    }
+
+    const { isParticipant } = await verifyParticipant(sessionId, session.user.id, 'editor')
+    if (!isParticipant) {
+      return NextResponse.json({ error: 'No edit permission' }, { status: 403 })
+    }
+
+    const idea = await prisma.brainstormIdea.findFirst({
+      where: { id: ideaId, sessionId },
+    })
+
+    if (!idea) {
+      return NextResponse.json({ error: 'Idea not found' }, { status: 404 })
+    }
+
+    const updated = await prisma.brainstormIdea.update({
+      where: { id: ideaId },
+      data: { isStarred: !idea.isStarred },
+    })
+
+    await emitToSession(sessionId, 'idea:starred', {
+      ideaId,
+      isStarred: updated.isStarred,
+      userId: session.user.id,
+    })
+
+    return NextResponse.json({ success: true, data: { ideaId, isStarred: updated.isStarred } })
+  } catch (error) {
+    console.error('Error starring idea:', error)
+    return NextResponse.json({ error: 'Failed to star idea' }, { status: 500 })
+  }
+}