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/prisma/schema.prisma

@@ -183,6 +183,8 @@ model Note {
   labelRelations             Label[]                  @relation("LabelToNote")
   attachments                NoteAttachment[]
   brainstormNoteRefs         BrainstormNoteRef[]
+  outgoingLinks              NoteLink[]               @relation("SourceLinks")
+  incomingLinks              NoteLink[]               @relation("TargetLinks")
 
   @@index([isPinned])
   @@index([isArchived])
@@ -325,6 +327,20 @@ model NoteEmbedding {
   @@index([noteId])
 }
 
+model NoteLink {
+  id              String   @id @default(cuid())
+  sourceNoteId    String
+  targetNoteId    String
+  contextSnippet  String?
+  createdAt       DateTime @default(now())
+  sourceNote      Note     @relation("SourceLinks", fields: [sourceNoteId], references: [id], onDelete: Cascade)
+  targetNote      Note     @relation("TargetLinks", fields: [targetNoteId], references: [id], onDelete: Cascade)
+
+  @@unique([sourceNoteId, targetNoteId])
+  @@index([sourceNoteId])
+  @@index([targetNoteId])
+}
+
 model Agent {
   id               String        @id @default(cuid())
   name             String
@@ -502,6 +518,7 @@ model BrainstormIdea {
   status            String              @default("active")
   positionX         Float?
   positionY         Float?
+  isStarred         Boolean             @default(false)
   createdAt         DateTime            @default(now())
   createdBy         String?
   createdByType     String?             @default("ai")