fix: Show detailing indicator by including detail tasks in listInitiativeTasks

listInitiativeTasks was filtering out detail tasks server-side, so the
detailAgentByPhase mapping could never resolve agent.taskId to a phaseId.
Move the filter to client-side (displayTasks) so detail tasks are available
for agent mapping but excluded from counts and display grouping.

apps/server/trpc/routers/task.ts

@@ -132,7 +132,7 @@ export function taskProcedures(publicProcedure: ProcedureBuilder) {
       .query(async ({ ctx, input }) => {
         const taskRepository = requireTaskRepository(ctx);
         const tasks = await taskRepository.findByInitiativeId(input.initiativeId);
-        return tasks.filter((t) => t.category !== 'detail');
+        return tasks;
       }),
 
     listPhaseTasks: publicProcedure