revert: restore production to the state before 730d0bd (PM/RBAC work moved to 'pm')

Their three commits (730d0bd, 5a9b543, 387edfb) reached production by push and
auto-deployed. 387edfb expects a users.username column that the live database does
not have, so POST /api/v1/auth/login was returning HTTP 500. Their schema changes
never applied either (projects still has only id, name, description, start_date,
pm_user_id, created_at), so nothing depends on the reverted code.

This commit sets the tree back to exactly a02b3ea — verified with git diff against
it — while keeping history linear: the work itself is preserved on 'pm' at 387edfb.

frontend/src/components/layout/Header.tsx

@@ -2,23 +2,6 @@ import type { ReactNode } from "react";
 import { useLocation, useNavigate } from "react-router-dom";
 import { ChevronRight, ClipboardList } from "lucide-react";
 import { cn } from "../../lib/utils";
-import { useAuthStore, type AuthUser } from "../../store/auth";
-
-const ROLE_LABELS: Record<string, string> = {
-  admin: "ادمین",
-  procurement_manager: "مدیر تدارکات",
-  pm: "مدیر پروژه",
-  supervisor: "سرپرست پروژه",
-};
-
-export function userSubtitle(user: AuthUser | null | undefined): string {
-  if (!user) return "";
-  const fullName = `${user.first_name || ""} ${user.last_name || ""}`.trim() || user.display_name || "کاربر";
-  const username = user.username || user.casdoor_id || "-";
-  const role = user.role_label || (user.role ? ROLE_LABELS[user.role] : "بدون نقش");
-  const proj = user.role === "supervisor" && user.project_name ? ` – پروژه: ${user.project_name}` : "";
-  return `${fullName} | نام کاربری: ${username} | نقش: ${role}${proj}`;
-}
 
 interface HeaderProps {
   title: string;
@@ -35,10 +18,6 @@ interface HeaderProps {
 export function Header({ title, sub, backTo, backLabel = "بازگشت", actions, brand, icon, menu }: HeaderProps) {
   const navigate = useNavigate();
   const location = useLocation();
-  const user = useAuthStore((s) => s.user);
-
-  const userSub = userSubtitle(user);
-  const displaySub = sub !== undefined ? sub : userSub;
 
   // اگر کاربر از داخل برنامه به این صفحه آمده، یک قدم برمی‌گردیم؛
   // اگر مستقیم باز شده (بدون سابقه‌ی داخلی)، به backTo می‌رویم.
@@ -68,7 +47,7 @@ export function Header({ title, sub, backTo, backLabel = "بازگشت", actions
       <div className="flex min-w-0 items-center gap-2.5">
         <div className="min-w-0">
           <h1 className="text-[17px] font-extrabold leading-6">{title}</h1>
-          {displaySub && <div className="text-[11.5px] text-muted font-normal mt-0.5">{displaySub}</div>}
+          {sub && <div className="text-[11px] text-muted">{sub}</div>}
         </div>
       </div>
       <div className="ms-auto flex flex-wrap items-center gap-2">{actions}</div>