feat: mobile UX, admin polish, rate limiting, and media assets

- Mobile responsiveness improvements across admin and public sections
- Admin: bookings modal, open-day page, team page, layout polish
- Added rate limiting, CSRF hardening, auth-edge improvements
- Scroll reveal, floating contact, back-to-top, Yandex map fixes
- Schedule filters refactor, team profile/info component updates
- New useTrainerPhotos hook
- Added class, team, master-class, and news images

src/app/admin/team/page.tsx

@@ -81,19 +81,32 @@ export default function TeamEditorPage() {
   }, [sectionTitle]);
 
   const saveOrder = useCallback(async (updated: Member[]) => {
+    const previous = members;
     setMembers(updated);
-    const res = await adminFetch("/api/admin/team/reorder", {
-      method: "PUT",
-      headers: { "Content-Type": "application/json" },
-      body: JSON.stringify({ ids: updated.map((m) => m.id) }),
-    });
-    setSaveStatus(res.ok ? "saved" : "error");
+    try {
+      const res = await adminFetch("/api/admin/team/reorder", {
+        method: "PUT",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ ids: updated.map((m) => m.id) }),
+      });
+      setSaveStatus(res.ok ? "saved" : "error");
+      if (!res.ok) setMembers(previous);
+    } catch {
+      setSaveStatus("error");
+      setMembers(previous);
+    }
     setTimeout(() => setSaveStatus("idle"), 2000);
-  }, []);
+  }, [members]);
 
   async function deleteMember(id: number) {
-    await adminFetch(`/api/admin/team/${id}`, { method: "DELETE" });
-    setMembers((prev) => prev.filter((m) => m.id !== id));
+    try {
+      const res = await adminFetch(`/api/admin/team/${id}`, { method: "DELETE" });
+      if (!res.ok) throw new Error();
+      setMembers((prev) => prev.filter((m) => m.id !== id));
+    } catch {
+      setSaveStatus("error");
+      setTimeout(() => setSaveStatus("idle"), 3000);
+    }
   }
 
   if (loading) {