refactor: update approval type annotations and improve code formatting

backend/app/api/agent.py

@@ -60,7 +60,6 @@ if TYPE_CHECKING:
     from sqlmodel.ext.asyncio.session import AsyncSession
 
     from app.models.activity_events import ActivityEvent
-    from app.models.approvals import Approval
     from app.models.board_memory import BoardMemory
     from app.models.board_onboarding import BoardOnboardingSession
 
@@ -422,7 +421,7 @@ async def create_approval(
     board: Board = BOARD_DEP,
     session: AsyncSession = SESSION_DEP,
     agent_ctx: AgentAuthContext = AGENT_CTX_DEP,
-) -> Approval:
+) -> ApprovalRead:
     """Create a board approval request."""
     _guard_board_access(agent_ctx, board)
     return await approvals_api.create_approval(

frontend/src/app/boards/[boardId]/page.tsx

@@ -1748,8 +1748,9 @@ export default function BoardDetailPage() {
         if (!Array.isArray(value)) return [];
         return value.filter((item): item is string => typeof item === "string");
       };
-      const linkedTaskIds = (approval as Approval & { task_ids?: string[] | null })
-        .task_ids;
+      const linkedTaskIds = (
+        approval as Approval & { task_ids?: string[] | null }
+      ).task_ids;
       const singleTaskId =
         approval.task_id ??
         payloadValue("task_id") ??
@@ -1764,7 +1765,9 @@ export default function BoardDetailPage() {
       ];
       return [...new Set(merged)];
     };
-    return approvals.filter((approval) => taskIdsForApproval(approval).includes(taskId));
+    return approvals.filter((approval) =>
+      taskIdsForApproval(approval).includes(taskId),
+    );
   }, [approvals, selectedTask]);
 
   const workingAgentIds = useMemo(() => {
@@ -2221,8 +2224,9 @@ export default function BoardDetailPage() {
 
   const approvalTaskIds = (approval: Approval) => {
     const payload = approval.payload ?? {};
-    const linkedTaskIds = (approval as Approval & { task_ids?: string[] | null })
-      .task_ids;
+    const linkedTaskIds = (
+      approval as Approval & { task_ids?: string[] | null }
+    ).task_ids;
     const singleTaskId =
       approval.task_id ??
       approvalPayloadValue(payload, "task_id") ??
@@ -2259,7 +2263,8 @@ export default function BoardDetailPage() {
     const isAssign = approval.action_type.includes("assign");
     const rows: Array<{ label: string; value: string }> = [];
     if (taskIds.length === 1) rows.push({ label: "Task", value: taskIds[0] });
-    if (taskIds.length > 1) rows.push({ label: "Tasks", value: taskIds.join(", ") });
+    if (taskIds.length > 1)
+      rows.push({ label: "Tasks", value: taskIds.join(", ") });
     if (isAssign) {
       rows.push({
         label: "Assignee",

frontend/src/components/BoardApprovalsPanel.tsx

@@ -190,7 +190,8 @@ const approvalSummary = (approval: Approval, boardLabel?: string | null) => {
   const rows: Array<{ label: string; value: string }> = [];
   if (boardLabel) rows.push({ label: "Board", value: boardLabel });
   if (taskIds.length === 1) rows.push({ label: "Task", value: taskIds[0] });
-  if (taskIds.length > 1) rows.push({ label: "Tasks", value: taskIds.join(", ") });
+  if (taskIds.length > 1)
+    rows.push({ label: "Tasks", value: taskIds.join(", ") });
   if (isAssign) {
     rows.push({
       label: "Assignee",