Redesign notes list and editor to match Keep-style mockups.

Add checklist, activity link, location, analyze flag, and audio attachments with a real API-backed masonry UI.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/prisma/schema.prisma

@@ -383,6 +383,7 @@ model Activity {
   assignee       User?          @relation("ActivityAssignee", fields: [assigneeId], references: [id], onDelete: SetNull)
   createdById    String?
   createdBy      User?          @relation("ActivityCreator", fields: [createdById], references: [id], onDelete: SetNull)
+  notes          Note[]
   createdAt      DateTime       @default(now())
   updatedAt      DateTime       @updatedAt
 
@@ -405,12 +406,18 @@ model Note {
   color          String?      @default("default")
   tags           String[]     @default([])
   reminderAt     DateTime?
+  /// [{ id: string, text: string, done: boolean }]
+  checklist      Json?
+  locationText   String?
+  analyzeEnabled Boolean      @default(true)
   personId       String?
   person         Person?      @relation(fields: [personId], references: [id], onDelete: SetNull)
   companyId      String?
   company        Company?     @relation(fields: [companyId], references: [id], onDelete: SetNull)
   dealId         String?
   deal           Deal?        @relation(fields: [dealId], references: [id], onDelete: SetNull)
+  activityId     String?
+  activity       Activity?    @relation(fields: [activityId], references: [id], onDelete: SetNull)
   authorId       String?
   author         User?        @relation("NoteAuthor", fields: [authorId], references: [id], onDelete: SetNull)
   attachments    NoteAttachment[]
@@ -424,6 +431,7 @@ model Note {
   @@index([personId])
   @@index([companyId])
   @@index([dealId])
+  @@index([activityId])
   @@index([authorId])
 }