Merge pm (panel-based access, supervisor role) onto the restored RBAC base

Reverting 253c922 first made this merge small — only two conflicts:
- MobileTabBar: supervisor null-check combined with v7's /review hiding
- ArrivalsPage: pm's PM+supervisor scoping combined with v8's 3-way fetch
  (transfers) and its transfer-receive helpers, plus pm's canAccess gate

frontend/src/lib/api.ts

@@ -1662,6 +1662,10 @@ export interface UserRow {
   phone: string | null;
   role: "pm" | "procurement_manager" | "admin" | "supervisor" | null;
   role_label: string | null;
+  // لایه پنل‌ها (جایگزین نقش‌ها): {'procurement': 'full'|'limited', ...}
+  panels?: Record<string, string>;
+  // عضویت M:N پروژه‌ای — محدوده داده سطح limited
+  member_project_ids?: string[];
   project_id: string | null;
   project_name: string | null;
   // 1:N — every project this PM manages (oldest first).
@@ -1757,6 +1761,11 @@ export const apiV26 = {
     }): Promise<UserRow> => postData<UserRow>("/users", body),
     updateRole: async (id: string, role: "pm" | "procurement_manager" | "admin" | "supervisor" | null): Promise<UserRow> =>
       patchData<UserRow>(`/users/${id}`, { role }),
+    // لایه پنل‌ها — تخصیص پنل + سطح دسترسی و عضویت پروژه‌ای (فقط ادمین)
+    setPanels: async (id: string, panels: Record<string, string>): Promise<UserRow> =>
+      patchData<UserRow>(`/users/${id}/panels`, { panels }),
+    setPanelProjects: async (id: string, project_ids: string[]): Promise<UserRow> =>
+      patchData<UserRow>(`/users/${id}/panel-projects`, { project_ids }),
     assignProject: async (id: string, projectId: string | null): Promise<UserRow> =>
       postData<UserRow>(`/users/${id}/project`, { project_id: projectId }),
     // همگام‌سازی هویت‌ها از Casdoor (ادمین/مدیر تدارکات) — نقش‌ها دست‌نخورده می‌مانند