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/components/sections/Schedule.tsx

@@ -1,6 +1,7 @@
 "use client";
 
 import { useReducer, useMemo, useCallback } from "react";
+import { useTrainerPhotos } from "@/hooks/useTrainerPhotos";
 import { SignupModal } from "@/components/ui/SignupModal";
 import { CalendarDays, Users, LayoutGrid, SlidersHorizontal, MapPin } from "lucide-react";
 import { SectionHeading } from "@/components/ui/SectionHeading";
@@ -135,15 +136,7 @@ export function Schedule({ data: schedule, scheduleConfig, classItems, teamMembe
 
   const typeDots = useMemo(() => buildTypeDots(classItems), [classItems]);
 
-  const trainerPhotos = useMemo(() => {
-    const map: Record<string, string> = {};
-    if (teamMembers) {
-      for (const m of teamMembers) {
-        if (m.image) map[m.name] = m.image;
-      }
-    }
-    return map;
-  }, [teamMembers]);
+  const trainerPhotos = useTrainerPhotos(teamMembers);
 
   // Build days: either from one location or merged from all
   const activeDays: ScheduleDayMerged[] = useMemo(() => {
@@ -251,14 +244,14 @@ export function Schedule({ data: schedule, scheduleConfig, classItems, teamMembe
         classes: day.classes.filter(
           (cls) => {
             const clsStatus = cls.status || (cls.recruiting ? "recruiting" : cls.hasSlots ? "hasSlots" : "");
+            const matchesTime = !activeTimeRange || (
+              startTimeMinutes(cls.time) >= activeTimeRange[0] && startTimeMinutes(cls.time) < activeTimeRange[1]
+            );
             return (filterTrainerSet.size === 0 || filterTrainerSet.has(cls.trainer)) &&
             (filterTypes.size === 0 || filterTypes.has(cls.type)) &&
             (filterStatusSet.size === 0 || (clsStatus && filterStatusSet.has(clsStatus))) &&
             (!filterLevel || cls.level === filterLevel) &&
-            (!activeTimeRange || (() => {
-              const m = startTimeMinutes(cls.time);
-              return m >= activeTimeRange[0] && m < activeTimeRange[1];
-            })());
+            matchesTime;
           }),
       }))
       .filter((day) => day.classes.length > 0);
@@ -384,8 +377,10 @@ export function Schedule({ data: schedule, scheduleConfig, classItems, teamMembe
         {/* View mode toggle + filter button */}
         <Reveal>
           <div className="mt-4 hidden sm:flex items-center justify-center">
-            <div className="inline-flex items-center rounded-xl border border-neutral-200 bg-neutral-100 p-1 dark:border-white/[0.08] dark:bg-white/[0.04]">
+            <div className="inline-flex items-center rounded-xl border border-neutral-200 bg-neutral-100 p-1 dark:border-white/[0.08] dark:bg-white/[0.04]" role="tablist" aria-label="Режим отображения">
               <button
+                role="tab"
+                aria-selected={viewMode === "days"}
                 onClick={() => dispatch({ type: "SET_VIEW", mode: "days" })}
                 className={`inline-flex items-center gap-1.5 rounded-lg px-4 py-2 text-xs font-medium transition-all duration-200 cursor-pointer ${
                   viewMode === "days"
@@ -397,6 +392,8 @@ export function Schedule({ data: schedule, scheduleConfig, classItems, teamMembe
                 По дням
               </button>
               <button
+                role="tab"
+                aria-selected={viewMode === "groups"}
                 onClick={() => dispatch({ type: "SET_VIEW", mode: "groups" })}
                 className={`inline-flex items-center gap-1.5 rounded-lg px-4 py-2 text-xs font-medium transition-all duration-200 cursor-pointer ${
                   viewMode === "groups"