[taskboard] add heartbeat task pickup

lib/tasks.ts

@@ -243,6 +243,45 @@ export async function listTaskEvents(taskId?: number, limit = 50) {
   return rows;
 }
 
+export async function listTasksForAssignee(assigneeAliases: string[], options?: {
+  includeDone?: boolean;
+}) {
+  if (assigneeAliases.length === 0) {
+    return [] as TaskRecord[];
+  }
+
+  const placeholders = assigneeAliases.map(() => "?").join(", ");
+  const params: unknown[] = [...assigneeAliases];
+  const clauses = [`assignee IN (${placeholders})`];
+  if (!options?.includeDone) {
+    clauses.push("status != 'Done'");
+  }
+
+  const rows = await all<DatabaseTaskRow>(
+    `SELECT * FROM tasks
+     WHERE ${clauses.join(" AND ")}
+     ORDER BY
+       CASE status
+         WHEN 'In Progress' THEN 0
+         WHEN 'Review' THEN 1
+         WHEN 'Todo' THEN 2
+         WHEN 'Backlog' THEN 3
+         ELSE 4
+       END,
+       CASE priority
+         WHEN 'Critical' THEN 0
+         WHEN 'High' THEN 1
+         WHEN 'Medium' THEN 2
+         ELSE 3
+       END,
+       created_at ASC,
+       id ASC`,
+    params,
+  );
+
+  return rows.map(normalizeTask);
+}
+
 export async function listTaskTemplates(): Promise<TaskTemplate[]> {
   return TASK_TEMPLATES;
 }