feat: add board group models and update related interfaces

backend/app/schemas/view_models.py

@@ -1,9 +1,13 @@
 from __future__ import annotations
 
-from sqlmodel import SQLModel
+from datetime import datetime
+from uuid import UUID
+
+from sqlmodel import Field, SQLModel
 
 from app.schemas.agents import AgentRead
 from app.schemas.approvals import ApprovalRead
+from app.schemas.board_groups import BoardGroupRead
 from app.schemas.board_memory import BoardMemoryRead
 from app.schemas.boards import BoardRead
 from app.schemas.tasks import TaskRead
@@ -22,3 +26,29 @@ class BoardSnapshot(SQLModel):
     approvals: list[ApprovalRead]
     chat_messages: list[BoardMemoryRead]
     pending_approvals_count: int = 0
+
+
+class BoardGroupTaskSummary(SQLModel):
+    id: UUID
+    board_id: UUID
+    board_name: str
+    title: str
+    status: str
+    priority: str
+    assigned_agent_id: UUID | None = None
+    assignee: str | None = None
+    due_at: datetime | None = None
+    in_progress_at: datetime | None = None
+    created_at: datetime
+    updated_at: datetime
+
+
+class BoardGroupBoardSnapshot(SQLModel):
+    board: BoardRead
+    task_counts: dict[str, int] = Field(default_factory=dict)
+    tasks: list[BoardGroupTaskSummary] = Field(default_factory=list)
+
+
+class BoardGroupSnapshot(SQLModel):
+    group: BoardGroupRead | None = None
+    boards: list[BoardGroupBoardSnapshot] = Field(default_factory=list)