权限管理：接入项目级权限矩阵

新增项目级角色权限矩阵，覆盖 PM、CRA、PV、IMP、QA 等项目角色，并通过迁移表持久化各业务模块的读写权限。

后端将参与者、合同费用、物资、启动、里程碑、风险问题、监查稽查、FAQ、共享库、文件版本等接口接入矩阵校验，修复审计日志导出权限和登录 502 的依赖导入问题。

前端新增权限管理页面和项目路由权限映射，按矩阵控制导航显示、直接访问拦截、操作按钮启停，并限制管理后台仅 admin 和授权 PM 可进入。

补充后端权限归一化与接口静态测试、前端路由/权限工具/权限管理页面/工作台等回归测试。

frontend/src/utils/projectRoutePermissions.test.ts

@@ -0,0 +1,24 @@
+import { describe, expect, it } from "vitest";
+import { findFirstAccessibleProjectPath, getProjectRoutePermission, hasProjectPermission } from "./projectRoutePermissions";
+
+describe("project route permissions", () => {
+  it("maps project routes to read permission modules", () => {
+    expect(getProjectRoutePermission("/project/overview")).toEqual({ module: "project_overview", action: "read" });
+    expect(getProjectRoutePermission("/knowledge/medical-consult/abc")).toEqual({ module: "faq", action: "read" });
+    expect(getProjectRoutePermission("/knowledge/notes/new")).toEqual({ module: "shared_library", action: "read" });
+    expect(getProjectRoutePermission("/startup/kickoff/new")).toEqual({ module: "startup_auth", action: "read" });
+  });
+
+  it("rejects project routes when the role lacks module read permission", () => {
+    const matrix = {
+      CRA: {
+        project_overview: { read: false, write: false },
+        shared_library: { read: true, write: true },
+      },
+    } as any;
+
+    expect(hasProjectPermission(matrix, "CRA", getProjectRoutePermission("/project/overview"), false)).toBe(false);
+    expect(hasProjectPermission(matrix, "CRA", getProjectRoutePermission("/knowledge/notes"), false)).toBe(true);
+    expect(findFirstAccessibleProjectPath(matrix, "CRA", false)).toBe("/knowledge/notes");
+  });
+});