feat(board): daily board linked to shots

A /board page that replaces the shared doc used as the day-to-day tracker.
One card per active/on-hold project with a status line, dated milestones
and to-do lines typed or pasted in the doc's own format:

  DH2_VFX_027_090 finalise (CHRIS)
  DH2_VFX_005_010 gfx update @michelle wait: client GFX ADH_GFX_005_020

Shot codes link to the shot (live status + latest version), (NAME)/@name
assigns, wait: marks a blocker, headings group lines. Codes that match no
shot are flagged, with a relink when there is an obvious near miss.

Board lines are their own model, not Tasks: tasks drive shot status and
notifications, and a note like "finalise" must not touch either.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

prisma/schema.prisma

@@ -262,6 +262,7 @@ model User {
   createdShootDays        ShootDay[]       @relation("ShootDayCreator")
   createdTakes            Take[]           @relation("TakeCreator")
   uploadedTakeAttachments TakeAttachment[] @relation("TakeAttachmentUploader")
+  assignedBoardItems      BoardItem[]      @relation("BoardItemAssignee")
 
   @@map("users")
 }
@@ -382,6 +383,14 @@ model Project {
   deliveryPackages DeliveryPackage[]
   deliveryRequests DeliveryRequest[]
 
+  /// The one-line "where are we" on the daily board ("Official bid sent",
+  /// "Awaiting feedback on pick-ups"). Free text on purpose: it is what the
+  /// producer would have typed at the top of the project's section in the doc.
+  boardStatus   String?  @db.Text
+  boardStatusAt DateTime?
+  boardItems    BoardItem[]
+  milestones    ProjectMilestone[]
+
   @@map("projects")
 }
 
@@ -487,6 +496,7 @@ model Shot {
   loggedTakes   Take[]          @relation("TakeToShot")
   exports       Export[]
   deliveryRequestLines DeliveryRequestLine[]
+  boardItems           BoardItem[]
 
   @@unique([projectId, shotCode])
   @@map("shots")
@@ -1255,6 +1265,57 @@ model DeliveryRequestLine {
   @@map("delivery_request_lines")
 }
 
+/// A line on the daily board — the day-to-day to-do the team used to keep in
+/// a shared doc ("DH2_VFX_027_090 finalise (CHRIS)"). Deliberately not a Task:
+/// tasks are the pipeline's one-per-shot work items whose state drives shot
+/// status, and a note like "finalise" or "awaiting gfx" must not move a shot
+/// back to IN_PROGRESS or notify anyone.
+///
+/// `code` is the shot code as typed. When it matches a shot, `shotId` links it
+/// and the board shows the shot's live status; when it does not, the line is a
+/// flag ("not on our tracker?") until the shot exists or the code is fixed.
+model BoardItem {
+  id          String    @id @default(cuid())
+  projectId   String
+  project     Project   @relation(fields: [projectId], references: [id], onDelete: Cascade)
+  shotId      String?
+  shot        Shot?     @relation(fields: [shotId], references: [id], onDelete: SetNull)
+  code        String?
+  text        String    @db.Text
+  /// Heading the line sits under on the board ("WATER DROPS"); "" = none
+  group       String    @default("")
+  assigneeId  String?
+  assignee    User?     @relation("BoardItemAssignee", fields: [assigneeId], references: [id], onDelete: SetNull)
+  /// What the line is blocked on ("client GFX ADH_GFX_013_010"); null = not blocked
+  waitingOn   String?
+  sortOrder   Int       @default(0)
+  doneAt      DateTime?
+  doneById    String?
+  createdById String
+  createdAt   DateTime  @default(now())
+  updatedAt   DateTime  @updatedAt
+
+  @@index([projectId, doneAt])
+  @@index([shotId])
+  @@map("board_items")
+}
+
+/// A dated project milestone — batch deliveries, picture locks, shoot start,
+/// colour & mix review. Episode due dates stay in EpisodeDueDate because the
+/// shot-status board keys off them; these are the dates around the work.
+model ProjectMilestone {
+  id        String    @id @default(cuid())
+  projectId String
+  project   Project   @relation(fields: [projectId], references: [id], onDelete: Cascade)
+  label     String
+  date      DateTime
+  doneAt    DateTime?
+  createdAt DateTime  @default(now())
+
+  @@index([projectId, date])
+  @@map("project_milestones")
+}
+
 model SketchTemplate {
   id        String   @id @default(cuid())
   name      String