feat: add is_chat field to board memory and task_id to approvals, update pagination and response models

backend/app/schemas/approvals.py

@@ -13,6 +13,7 @@ ApprovalStatus = Literal["pending", "approved", "rejected"]
 
 class ApprovalBase(SQLModel):
     action_type: str
+    task_id: UUID | None = None
     payload: dict[str, object] | None = None
     confidence: int
     rubric_scores: dict[str, int] | None = None

backend/app/schemas/board_memory.py

@@ -9,12 +9,18 @@ from app.schemas.common import NonEmptyStr
 
 
 class BoardMemoryCreate(SQLModel):
+    # For writes, reject blank/whitespace-only content.
     content: NonEmptyStr
     tags: list[str] | None = None
     source: str | None = None
 
 
-class BoardMemoryRead(BoardMemoryCreate):
+class BoardMemoryRead(SQLModel):
     id: UUID
     board_id: UUID
+    # For reads, allow legacy rows that may have empty content (avoid response validation 500s).
+    content: str
+    tags: list[str] | None = None
+    source: str | None = None
+    is_chat: bool = False
     created_at: datetime

backend/app/schemas/pagination.py

@@ -0,0 +1,21 @@
+from __future__ import annotations
+
+from typing import TypeVar
+
+from fastapi import Query
+from fastapi_pagination.customization import CustomizedPage, UseParamsFields
+from fastapi_pagination.limit_offset import LimitOffsetPage
+
+T = TypeVar("T")
+
+
+# Project-wide default pagination response model.
+# - Keep `limit` / `offset` naming (matches existing API conventions).
+# - Cap list endpoints to 200 items per request (matches prior route-level constraints).
+DefaultLimitOffsetPage = CustomizedPage[
+    LimitOffsetPage[T],
+    UseParamsFields(
+        limit=Query(200, ge=1, le=200),
+        offset=Query(0, ge=0),
+    ),
+]

backend/app/schemas/view_models.py

@@ -0,0 +1,24 @@
+from __future__ import annotations
+
+from sqlmodel import SQLModel
+
+from app.schemas.agents import AgentRead
+from app.schemas.approvals import ApprovalRead
+from app.schemas.board_memory import BoardMemoryRead
+from app.schemas.boards import BoardRead
+from app.schemas.tasks import TaskRead
+
+
+class TaskCardRead(TaskRead):
+    assignee: str | None = None
+    approvals_count: int = 0
+    approvals_pending_count: int = 0
+
+
+class BoardSnapshot(SQLModel):
+    board: BoardRead
+    tasks: list[TaskCardRead]
+    agents: list[AgentRead]
+    approvals: list[ApprovalRead]
+    chat_messages: list[BoardMemoryRead]
+    pending_approvals_count: int = 0