feat(mui): consistent staggered page entrance across all 43 route pages

Adopt the PageEnter wrapper as every page's outermost render element and remove the ad-hoc per-page entrance motion.div wrappers. Every page now enters the same way — all top-level sections rise+fade in, staggered — so nothing appears instantly and the motion is identical app-wide. Presentation-only: no data/logic/hooks/invalidate/permissions touched. Embedded sub-tabs (CompanySettings, ReceivedInvoices), Login (auth shell) and the dev UiKit are intentionally excluded. Gates: tsc -b --noEmit=0, build=0, vitest 152/152.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/admin/pages/WarehouseReservations.tsx

@@ -4,7 +4,6 @@ import { useQuery, useQueryClient } from "@tanstack/react-query";
 import { useAlert } from "../context/AlertContext";
 import { useAuth } from "../context/AuthContext";
 import Forbidden from "../components/Forbidden";
-import { motion } from "framer-motion";
 import Box from "@mui/material/Box";
 import IconButton from "@mui/material/IconButton";
 import { usePaginatedQuery } from "../hooks/usePaginatedQuery";
@@ -29,6 +28,7 @@ import {
   Select,
   StatusChip,
   PageHeader,
+  PageEnter,
   FilterBar,
   EmptyState,
   LoadingState,
@@ -325,27 +325,21 @@ export default function WarehouseReservations() {
   ];
 
   return (
-    <Box>
-      <motion.div
-        initial={{ opacity: 0, y: 12 }}
-        animate={{ opacity: 1, y: 0 }}
-        transition={{ duration: 0.25 }}
-      >
-        <PageHeader
-          title="Rezervace"
-          subtitle={subtitle}
-          actions={
-            canOperate ? (
-              <Button
-                startIcon={PlusIcon}
-                onClick={() => setShowCreateModal(true)}
-              >
-                Nová rezervace
-              </Button>
-            ) : undefined
-          }
-        />
-      </motion.div>
+    <PageEnter>
+      <PageHeader
+        title="Rezervace"
+        subtitle={subtitle}
+        actions={
+          canOperate ? (
+            <Button
+              startIcon={PlusIcon}
+              onClick={() => setShowCreateModal(true)}
+            >
+              Nová rezervace
+            </Button>
+          ) : undefined
+        }
+      />
 
       <FilterBar>
         <Box sx={{ flex: "0 0 160px" }}>
@@ -490,6 +484,6 @@ export default function WarehouseReservations() {
         confirmVariant="danger"
         loading={cancelling}
       />
-    </Box>
+    </PageEnter>
   );
 }