feat(frontend): unified warehouse UI, calendar fix, partial receipts, RBAC views, admin panel, dev-mode 3-step

- header: icon box + dynamic subheader '[user] | [role] – [project/همه پروژهها]'
  on every warehouse page; module context kept in the hamburger (items 1-2)
- project manager view: office button + inline logout removed; hamburger
  contains only «خروج از حساب»; sub-views get «بازگشت به داشبورد» (Header
  backTo/goBack); «افزایش موجود» primary button on the dashboard (item 8)
- daily control: cells render the day-of-month (was the Jalali year),
  month nav uses real Jalali months, header is pure Jalali
  «امروز ۸ شهریور ۱۴۰۵», today gets a blue accent (item 3)
- arrivals: partial (item/qty) receipt — any valid item is enough to submit,
  ceiling + allocation-sum validation with inline errors, Received/In-Transit
  badges; ledger shows «رسیده X از Y» / «در راه Z» + «رسید جزیی» badge (item 4)
- api client: multipart uploads no longer send Content-Type json (fixes the
  invoice/proforma 400 «دادهی ارسالشده نامعتبر است»); undefined query
  params are dropped (fixes empty admin project filter, item 5)
- organization: user-creation card removed, role column read-only for
  procurement manager, Casdoor sync button (item 6)
- admin panel (/admin): Casdoor user sync + grant/revoke «مدیر تدارکات»;
  Developer Mode is a 3-step admin-gated flow on the login page (item 7)

frontend/src/pages/Inventory/InventoryPage.tsx

@@ -1,11 +1,12 @@
 import { useMemo, useState } from "react";
-import { useLocation, useSearchParams } from "react-router-dom";
+import { Link, useLocation, useSearchParams } from "react-router-dom";
+import { Plus, Warehouse as WarehouseIcon } from "lucide-react";
 import { Header, PageLayout } from "../../components/layout/Header";
 import { EmptyState } from "../../components/EmptyState";
 import { Badge } from "../../components/ui/badge";
 import { useAuthStore } from "../../store/auth";
 import { PanelMenu } from "../../components/PanelMenu";
-import { panelMenuItems, accountMenuItems, useLogout } from "./panelMenu";
+import { accountMenuItems, inventorySubheader, panelMenuItems, pmMenuItems, useLogout } from "./panelMenu";
 import { InventoryTopNav } from "./InventoryTopNav";
 import { useInventoryData, brandName, catName, materialName, unitName, whName } from "./useInventoryData";
 import type { InventoryRow, InventoryTransaction, TransactionType } from "../../lib/types";
@@ -137,9 +138,28 @@ export function InventoryPage() {
     <div className="min-h-screen">
       <Header
         title="سامانه مدیریت انبار"
-        sub={isAdmin ? "مدیر تدارکات — همه پروژه‌ها" : user?.project_name ? `مدیر پروژه — ${user.project_name}` : "مدیر پروژه"}
-        menu={isAdmin ? <PanelMenu title="پنل مدیریت انبار" items={accountMenuItems(logout)} /> : undefined}
-        actions={isAdmin || isPM ? <InventoryTopNav pathname={location.pathname} onLogout={logout} variant={isAdmin ? "admin" : "pm"} /> : undefined}
+        sub={inventorySubheader(user)}
+        icon={<WarehouseIcon className="h-4.5 w-4.5" strokeWidth={2} />}
+        menu={
+          <PanelMenu
+            title="پنل مدیریت انبار"
+            items={isAdmin ? accountMenuItems(logout) : pmMenuItems(logout)}
+          />
+        }
+        actions={
+          <>
+            <InventoryTopNav pathname={location.pathname} variant={isAdmin ? "admin" : "pm"} />
+            {isPM && (
+              <Link
+                to="/inventory/change?type=PURCHASE"
+                className="btn-line-file no-underline bg-accent text-white hover:bg-accent-dark"
+              >
+                <Plus className="h-3.5 w-3.5" />
+                افزایش موجود
+              </Link>
+            )}
+          </>
+        }
       />
       <PageLayout className="flex flex-col gap-3">
         {/* فیلترها */}