feat: add thread status documents and safe thread reply handling

src/app/api/v1/projects/[projectId]/thread-status/route.ts

@@ -1,6 +1,7 @@
 import { NextRequest, NextResponse } from "next/server";
 import { requireRequestSession } from "@/lib/boss-auth";
 import { readState } from "@/lib/boss-data";
+import { getProjectDetailView } from "@/lib/boss-projections";
 
 export async function GET(
   request: NextRequest,
@@ -13,8 +14,8 @@ export async function GET(
 
   const { projectId } = await context.params;
   const state = await readState();
-  const project = state.projects.find((item) => item.id === projectId);
-  if (!project) {
+  const detail = getProjectDetailView(state, projectId, session.account);
+  if (!detail) {
     return NextResponse.json({ ok: false, message: "PROJECT_NOT_FOUND" }, { status: 404 });
   }