update seatMap

frontend-client/src/components/OctagonSeatMap.tsx

@@ -1,398 +0,0 @@
-"use client";
-
-import { useMemo, useState, useCallback } from "react";
-import type { AxiosError } from "axios";
-import { useCartStore } from "@/store/cartStore";
-import { useAuthStore } from "@/store/authStore";
-import { lockSeatApi, type SeatResponse } from "@/api/client";
-
-// ─── Internal rendered seat type (adds SVG coordinates) ──────────────────────
-
-type SeatStatus = "AVAILABLE" | "SOLD" | "LOCKED";
-type SeatType = "VIP" | "STD";
-
-interface SeatData {
-  id: number;
-  x: number;
-  y: number;
-  row: number;
-  number: number;
-  sector: string;
-  type: SeatType;
-  status: SeatStatus;
-  price: number;
-}
-
-// ─── Layout constants ─────────────────────────────────────────────────────────
-
-const CX = 200;
-const CY = 192;
-const OCTAGON_R = 58;
-const RING_MIN_R = 85;
-const RING_MAX_R = 165;
-
-// ─── Map API seats → SVG positions ───────────────────────────────────────────
-
-/**
- * Groups seats by (sector, row) → each group becomes one concentric ring.
- * Rings are sorted VIP-first, then alphabetically by sector, then by row number.
- * Radii are distributed evenly between RING_MIN_R and RING_MAX_R.
- * Seats within a ring are placed at equal angles starting from the top (−π/2).
- */
-function computeSeatPositions(apiSeats: SeatResponse[]): SeatData[] {
-  // 1. Group by "sector::row"
-  const ringsMap = new Map<string, SeatResponse[]>();
-  for (const seat of apiSeats) {
-    const key = `${seat.sector}::${seat.row}`;
-    if (!ringsMap.has(key)) ringsMap.set(key, []);
-    ringsMap.get(key)!.push(seat);
-  }
-
-  // 2. Sort rings: VIP innermost, then alpha by sector, then by row
-  const sortedKeys = Array.from(ringsMap.keys()).sort((a, b) => {
-    const [sA, rA] = a.split("::");
-    const [sB, rB] = b.split("::");
-    if (sA === "VIP" && sB !== "VIP") return -1;
-    if (sB === "VIP" && sA !== "VIP") return 1;
-    if (sA !== sB) return sA.localeCompare(sB);
-    return Number(rA) - Number(rB);
-  });
-
-  const numRings = sortedKeys.length;
-  const result: SeatData[] = [];
-
-  sortedKeys.forEach((key, ringIdx) => {
-    const ringSeats = [...ringsMap.get(key)!].sort((a, b) => a.number - b.number);
-    const [sector] = key.split("::");
-    const row = Number(key.split("::")[1]);
-
-    // 3. Assign radius (lerp between min and max)
-    const radius =
-      numRings <= 1
-        ? (RING_MIN_R + RING_MAX_R) / 2
-        : RING_MIN_R + (ringIdx / (numRings - 1)) * (RING_MAX_R - RING_MIN_R);
-
-    const total = ringSeats.length;
-
-    // 4. Place seats at equal angles, starting from top
-    ringSeats.forEach((seat, i) => {
-      const angle = (i / total) * 2 * Math.PI - Math.PI / 2;
-      result.push({
-        id: seat.id,
-        x: Math.round((CX + radius * Math.cos(angle)) * 10) / 10,
-        y: Math.round((CY + radius * Math.sin(angle)) * 10) / 10,
-        row,
-        number: seat.number,
-        sector,
-        type: sector === "VIP" ? "VIP" : "STD",
-        status: seat.is_available ? "AVAILABLE" : "SOLD",
-        price: seat.price,
-      });
-    });
-  });
-
-  return result;
-}
-
-// ─── Octagon polygon points ───────────────────────────────────────────────────
-
-function octagonPoints(cx: number, cy: number, r: number): string {
-  return Array.from({ length: 8 }, (_, i) => {
-    const a = (i / 8) * 2 * Math.PI + Math.PI / 8;
-    return `${cx + r * Math.cos(a)},${cy + r * Math.sin(a)}`;
-  }).join(" ");
-}
-
-// ─── Seat color helpers ───────────────────────────────────────────────────────
-
-function seatFill(seat: SeatData, effectiveStatus: SeatStatus, isSelected: boolean): string {
-  if (isSelected) return "#E32636";
-  if (effectiveStatus === "SOLD") return "#2D3748";
-  if (effectiveStatus === "LOCKED") return "#D97706";
-  return seat.type === "VIP" ? "#8B5CF6" : "#0891B2";
-}
-
-function seatStroke(seat: SeatData, effectiveStatus: SeatStatus, isSelected: boolean): string {
-  if (isSelected) return "#FF6B7A";
-  if (effectiveStatus === "SOLD") return "#4B5563";
-  if (effectiveStatus === "LOCKED") return "#F59E0B";
-  return seat.type === "VIP" ? "#C084FC" : "#38BDF8";
-}
-
-// ─── Props ────────────────────────────────────────────────────────────────────
-
-interface OctagonSeatMapProps {
-  /**
-   * Seats from the API.
-   * `null`  → still loading (shows spinner)
-   * `[]`    → no seats yet (shows empty state)
-   * array   → renders the seat map
-   */
-  apiSeats: SeatResponse[] | null;
-}
-
-// ─── Component ────────────────────────────────────────────────────────────────
-
-export default function OctagonSeatMap({ apiSeats }: OctagonSeatMapProps) {
-  const { seats: cartSeats, addSeat, removeSeat } = useCartStore();
-  const selectedIds = useMemo(() => new Set(cartSeats.map((s) => s.seatId)), [cartSeats]);
-
-  // Compute SVG positions from API data (memoised, recomputes only when apiSeats changes)
-  const seats: SeatData[] = useMemo(
-    () => (apiSeats ? computeSeatPositions(apiSeats) : []),
-    [apiSeats]
-  );
-
-  // Local status overrides: applied after a 409 response to immediately mark a seat LOCKED
-  const [localStatuses, setLocalStatuses] = useState<Record<number, SeatStatus>>({});
-
-  // ID of seat currently awaiting API response — prevents multiple concurrent requests
-  const [pendingId, setPendingId] = useState<number | null>(null);
-
-  // Toast notification
-  const [toastMessage, setToastMessage] = useState("");
-  const [toastVisible, setToastVisible] = useState(false);
-
-  const showToast = useCallback((message: string) => {
-    setToastMessage(message);
-    setToastVisible(true);
-    setTimeout(() => setToastVisible(false), 3500);
-  }, []);
-
-  const handleSeatClick = useCallback(
-    async (seat: SeatData) => {
-      const effectiveStatus = localStatuses[seat.id] ?? seat.status;
-      if (effectiveStatus !== "AVAILABLE") return;
-      if (pendingId !== null) return;
-
-      // Deselect: remove from cart without API call (lock expires via Redis TTL)
-      if (selectedIds.has(seat.id)) {
-        removeSeat(seat.id);
-        return;
-      }
-
-      const userId = useAuthStore.getState().user?.id ?? 1;
-      setPendingId(seat.id);
-
-      try {
-        const { ticketId } = await lockSeatApi(seat.id, userId);
-
-        addSeat({
-          seatId: seat.id,
-          ticketId,
-          sector: seat.sector,
-          row: seat.row,
-          number: seat.number,
-          price: seat.price,
-        });
-      } catch (err) {
-        const axiosErr = err as AxiosError;
-
-        // Mark seat LOCKED locally so it becomes visually unavailable immediately
-        setLocalStatuses((prev) => ({ ...prev, [seat.id]: "LOCKED" }));
-
-        if (axiosErr.response?.status === 409) {
-          showToast("Извините, это место только что заняли");
-        } else {
-          showToast("Ошибка сети. Попробуйте ещё раз");
-        }
-      } finally {
-        setPendingId(null);
-      }
-    },
-    [localStatuses, pendingId, selectedIds, addSeat, removeSeat, showToast]
-  );
-
-  // ── Loading state ──
-  if (apiSeats === null) {
-    return (
-      <div className="flex items-center justify-center w-full py-16">
-        <div className="flex flex-col items-center gap-3">
-          <svg
-            className="w-8 h-8 animate-spin text-[#0891B2]"
-            viewBox="0 0 24 24"
-            fill="none"
-          >
-            <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4" />
-            <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8v4l3-3-3-3v4a8 8 0 00-8 8h4z" />
-          </svg>
-          <p className="text-[13px] text-[#8E8E93]">Загрузка схемы зала…</p>
-        </div>
-      </div>
-    );
-  }
-
-  // ── Empty state ──
-  if (apiSeats.length === 0) {
-    return (
-      <div className="flex items-center justify-center w-full py-16 px-6">
-        <div className="flex flex-col items-center gap-3 text-center">
-          <div className="w-14 h-14 rounded-2xl bg-[#1C1C1E] flex items-center justify-center">
-            <svg viewBox="0 0 24 24" fill="none" className="w-7 h-7 text-[#8E8E93]">
-              <rect x="3" y="3" width="18" height="18" rx="2" stroke="currentColor" strokeWidth="1.5" />
-              <path d="M9 9h6M9 12h6M9 15h4" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" />
-            </svg>
-          </div>
-          <p className="text-[15px] font-semibold text-white">Схема зала пока не сформирована</p>
-          <p className="text-[12px] text-[#8E8E93]">Администратор ещё не добавил места для этого события</p>
-        </div>
-      </div>
-    );
-  }
-
-  // ── Full seat map ──
-  return (
-    <div className="relative w-full px-2">
-      {/* ── Toast notification ── */}
-      <div
-        className={`absolute top-1 left-0 right-0 z-10 flex justify-center pointer-events-none transition-all duration-300 ${
-          toastVisible ? "opacity-100 translate-y-0" : "opacity-0 -translate-y-1"
-        }`}
-        aria-live="polite"
-        aria-atomic="true"
-      >
-        <div className="flex items-center gap-2 bg-[#1C1C1E] border border-[#E32636]/50 text-white text-[12px] font-medium px-4 py-2 rounded-full shadow-xl">
-          <span className="w-2 h-2 rounded-full bg-[#E32636] flex-shrink-0" />
-          {toastMessage}
-        </div>
-      </div>
-
-      <svg
-        viewBox="0 0 400 384"
-        className="w-full"
-        aria-label="Схема зала"
-        role="img"
-        style={{ cursor: pendingId !== null ? "wait" : undefined }}
-      >
-        <defs>
-          <radialGradient id="arena-bg" cx="50%" cy="50%" r="50%">
-            <stop offset="0%"   stopColor="#131328" />
-            <stop offset="100%" stopColor="#080812" />
-          </radialGradient>
-
-          <filter id="glow-red" x="-80%" y="-80%" width="260%" height="260%">
-            <feGaussianBlur in="SourceGraphic" stdDeviation="3" result="blur" />
-            <feMerge>
-              <feMergeNode in="blur" />
-              <feMergeNode in="SourceGraphic" />
-            </feMerge>
-          </filter>
-
-          <filter id="glow-soft" x="-50%" y="-50%" width="200%" height="200%">
-            <feGaussianBlur in="SourceGraphic" stdDeviation="1.5" result="blur" />
-            <feMerge>
-              <feMergeNode in="blur" />
-              <feMergeNode in="SourceGraphic" />
-            </feMerge>
-          </filter>
-
-          <filter id="glow-cage" x="-20%" y="-20%" width="140%" height="140%">
-            <feGaussianBlur in="SourceGraphic" stdDeviation="2.5" result="blur" />
-            <feMerge>
-              <feMergeNode in="blur" />
-              <feMergeNode in="SourceGraphic" />
-            </feMerge>
-          </filter>
-        </defs>
-
-        {/* ── Outer arena ellipse ── */}
-        <ellipse cx={CX} cy={CY} rx={186} ry={168} fill="url(#arena-bg)" stroke="#1E3A5F" strokeWidth="2" />
-        <ellipse cx={CX} cy={CY} rx={186} ry={168} fill="none" stroke="#2DD4BF" strokeWidth="1" opacity="0.35" />
-
-        {/* ── Inner floor area ── */}
-        <ellipse cx={CX} cy={CY} rx={146} ry={128} fill="#0B0B1E" stroke="#1E293B" strokeWidth="1" />
-
-        {/* ── Sector divider lines ── */}
-        {[0, 90, 180, 270].map((deg) => {
-          const rad = (deg * Math.PI) / 180;
-          return (
-            <line
-              key={deg}
-              x1={CX + 148 * Math.cos(rad)} y1={CY + 130 * Math.sin(rad)}
-              x2={CX + 182 * Math.cos(rad)} y2={CY + 165 * Math.sin(rad)}
-              stroke="#1E293B"
-              strokeWidth="1"
-            />
-          );
-        })}
-
-        {/* ── Octagon cage ── */}
-        <polygon points={octagonPoints(CX, CY, OCTAGON_R)} fill="none" stroke="#38BDF8" strokeWidth="4" opacity="0.25" filter="url(#glow-cage)" />
-        <polygon points={octagonPoints(CX, CY, OCTAGON_R)} fill="#05050F" stroke="#38BDF8" strokeWidth="1.5" />
-
-        {/* Cage cross-lines */}
-        {[0, 1, 2, 3].map((i) => {
-          const a1 = (i / 8) * 2 * Math.PI + Math.PI / 8;
-          const a2 = ((i + 4) / 8) * 2 * Math.PI + Math.PI / 8;
-          return (
-            <line
-              key={i}
-              x1={CX + (OCTAGON_R - 6) * Math.cos(a1)} y1={CY + (OCTAGON_R - 6) * Math.sin(a1)}
-              x2={CX + (OCTAGON_R - 6) * Math.cos(a2)} y2={CY + (OCTAGON_R - 6) * Math.sin(a2)}
-              stroke="#1E3A5F" strokeWidth="0.8" opacity="0.5"
-            />
-          );
-        })}
-
-        {/* Stage label */}
-        <text x={CX} y={CY + 5} textAnchor="middle" dominantBaseline="middle" fill="#64748B" fontSize="13" fontWeight="600" letterSpacing="1">
-          Stage
-        </text>
-
-        {/* ── Seat dots ── */}
-        {seats.map((seat) => {
-          const effectiveStatus = localStatuses[seat.id] ?? seat.status;
-          const isSelected = selectedIds.has(seat.id);
-          const isPending = pendingId === seat.id;
-          const isClickable = effectiveStatus === "AVAILABLE" && !isSelected && pendingId === null;
-          const r = seat.type === "VIP" ? 5 : 4.2;
-
-          return (
-            <circle
-              key={seat.id}
-              cx={seat.x}
-              cy={seat.y}
-              r={r}
-              fill={isPending ? "#94A3B8" : seatFill(seat, effectiveStatus, isSelected)}
-              stroke={isPending ? "#CBD5E1" : seatStroke(seat, effectiveStatus, isSelected)}
-              strokeWidth={isSelected ? 1.5 : isPending ? 1.2 : 0.8}
-              opacity={effectiveStatus === "SOLD" ? 0.45 : isPending ? 0.7 : 1}
-              cursor={isPending ? "wait" : isClickable || isSelected ? "pointer" : "not-allowed"}
-              className={isPending ? "animate-pulse" : undefined}
-              filter={
-                isSelected
-                  ? "url(#glow-red)"
-                  : effectiveStatus === "AVAILABLE" && !isPending
-                  ? "url(#glow-soft)"
-                  : undefined
-              }
-              onClick={() => { void handleSeatClick(seat); }}
-              role={isClickable || isSelected ? "button" : undefined}
-              aria-label={
-                isClickable
-                  ? `${seat.sector} Ряд ${seat.row} Место ${seat.number} — ${seat.price.toLocaleString("ru-RU")} ₽`
-                  : undefined
-              }
-            >
-              <title>
-                {seat.sector} • Ряд {seat.row} • Место {seat.number}
-                {isPending
-                  ? " (обработка…)"
-                  : effectiveStatus === "SOLD"
-                  ? " (Занято)"
-                  : effectiveStatus === "LOCKED"
-                  ? " (Удержано)"
-                  : ` — ${seat.price.toLocaleString("ru-RU")} ₽`}
-              </title>
-            </circle>
-          );
-        })}
-
-        {/* Transparent overlay blocking all SVG clicks while a request is in flight */}
-        {pendingId !== null && (
-          <rect x={0} y={0} width={400} height={384} fill="transparent" cursor="wait" style={{ pointerEvents: "all" }} />
-        )}
-      </svg>
-    </div>
-  );
-}

frontend-client/src/components/SeatMap.tsx

@@ -0,0 +1,251 @@
+"use client";
+
+import { useCallback, useMemo, useState } from "react";
+import type { AxiosError } from "axios";
+import { useCartStore } from "@/store/cartStore";
+import { useAuthStore } from "@/store/authStore";
+import { lockSeatApi, type Seat } from "@/api/client";
+
+// ─── Grouping ─────────────────────────────────────────────────────────────────
+
+/**
+ * Groups seats into sector → row → sorted seats[].
+ * Sectors are sorted VIP-first, then alphabetically.
+ */
+function groupSeats(seats: Seat[]): Map<string, Map<number, Seat[]>> {
+  const result = new Map<string, Map<number, Seat[]>>();
+
+  for (const seat of seats) {
+    if (!result.has(seat.sector)) result.set(seat.sector, new Map());
+    const rowMap = result.get(seat.sector)!;
+    if (!rowMap.has(seat.row)) rowMap.set(seat.row, []);
+    rowMap.get(seat.row)!.push(seat);
+  }
+
+  return new Map(
+    Array.from(result.entries()).sort(([a], [b]) => {
+      if (a === "VIP") return -1;
+      if (b === "VIP") return 1;
+      return a.localeCompare(b, "ru");
+    })
+  );
+}
+
+// ─── Component ────────────────────────────────────────────────────────────────
+
+interface SeatMapProps {
+  seats: Seat[];
+}
+
+export default function SeatMap({ seats }: SeatMapProps) {
+  const { seats: cartSeats, addSeat, removeSeat } = useCartStore();
+
+  const selectedIds = useMemo(
+    () => new Set(cartSeats.map((s) => s.seatId)),
+    [cartSeats]
+  );
+
+  // Seats marked unavailable locally after a 409 race-condition response
+  const [localLocked, setLocalLocked] = useState<Set<number>>(new Set());
+
+  // Prevents concurrent lock requests — only one seat at a time
+  const [pendingId, setPendingId] = useState<number | null>(null);
+
+  // Toast
+  const [toastMsg, setToastMsg] = useState<string | null>(null);
+
+  function showToast(msg: string) {
+    setToastMsg(msg);
+    setTimeout(() => setToastMsg(null), 3200);
+  }
+
+  const handleSeatClick = useCallback(
+    async (seat: Seat) => {
+      const isUnavailable = seat.status !== "AVAILABLE" || localLocked.has(seat.id);
+      if (isUnavailable || pendingId !== null) return;
+
+      // Deselect: remove from cart without an API call
+      if (selectedIds.has(seat.id)) {
+        removeSeat(seat.id);
+        return;
+      }
+
+      const userId = useAuthStore.getState().user?.id ?? 1;
+      setPendingId(seat.id);
+
+      try {
+        const { ticketId } = await lockSeatApi(seat.id, userId);
+        addSeat({
+          seatId: seat.id,
+          ticketId,
+          sector: seat.sector,
+          row: seat.row,
+          number: seat.number,
+          price: seat.price,
+        });
+      } catch (err) {
+        const axiosErr = err as AxiosError;
+        setLocalLocked((prev) => {
+          const next = new Set(prev);
+          next.add(seat.id);
+          return next;
+        });
+        showToast(
+          axiosErr.response?.status === 409
+            ? "Место только что заняли, выберите другое"
+            : "Ошибка сети. Попробуйте ещё раз"
+        );
+      } finally {
+        setPendingId(null);
+      }
+    },
+    [localLocked, pendingId, selectedIds, addSeat, removeSeat]
+  );
+
+  const grouped = useMemo(() => groupSeats(seats), [seats]);
+
+  // ── Empty state ──
+  if (seats.length === 0) {
+    return (
+      <div className="flex flex-col items-center justify-center py-16 px-6 text-center gap-3">
+        <div className="w-14 h-14 rounded-2xl bg-[#1C1C1E] flex items-center justify-center">
+          <svg viewBox="0 0 24 24" fill="none" className="w-7 h-7 text-[#8E8E93]">
+            <rect x="3" y="3" width="18" height="18" rx="2" stroke="currentColor" strokeWidth="1.5" />
+            <path d="M9 9h6M9 12h6M9 15h4" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" />
+          </svg>
+        </div>
+        <p className="text-[15px] font-semibold text-white">Схема зала пока не сформирована</p>
+        <p className="text-[12px] text-[#8E8E93]">Администратор ещё не добавил места для этого события</p>
+      </div>
+    );
+  }
+
+  return (
+    <div className="relative space-y-3 px-4 pb-2">
+
+      {/* ── Toast notification ── */}
+      <div
+        aria-live="polite"
+        aria-atomic="true"
+        className={`fixed top-14 left-1/2 -translate-x-1/2 z-50 transition-all duration-300 pointer-events-none ${
+          toastMsg ? "opacity-100 translate-y-0" : "opacity-0 -translate-y-2"
+        }`}
+      >
+        <div className="flex items-center gap-2 bg-[#1C1C1E] border border-[#E32636]/50 text-white text-[12px] font-medium px-4 py-2 rounded-full shadow-xl whitespace-nowrap">
+          <span className="w-2 h-2 rounded-full bg-[#E32636] flex-shrink-0" />
+          {toastMsg}
+        </div>
+      </div>
+
+      {/* ── Sector blocks ── */}
+      {Array.from(grouped.entries()).map(([sector, rowMap]) => {
+        const sectorSeats = seats.filter((s) => s.sector === sector);
+        const availableCount = sectorSeats.filter(
+          (s) => s.status === "AVAILABLE" && !localLocked.has(s.id)
+        ).length;
+        const pricePerSeat = sectorSeats[0]?.price ?? 0;
+
+        return (
+          <div key={sector} className="bg-[#1C1C1E] rounded-2xl p-4">
+
+            {/* Sector header */}
+            <div className="flex items-center justify-between mb-3">
+              <div className="flex items-center gap-2">
+                <span className="text-[13px] font-bold text-white uppercase tracking-wider">
+                  {sector}
+                </span>
+                <span className="text-[11px] font-semibold text-[#E32636]">
+                  {pricePerSeat.toLocaleString("ru-RU")} ₽
+                </span>
+              </div>
+              <span className="text-[11px] text-[#8E8E93]">
+                {availableCount} свободно
+              </span>
+            </div>
+
+            {/* Rows */}
+            <div className="space-y-1.5">
+              {Array.from(rowMap.entries())
+                .sort(([a], [b]) => a - b)
+                .map(([row, rowSeats]) => (
+                  <div key={row} className="flex items-center gap-2">
+
+                    {/* Row number label */}
+                    <span className="text-[10px] text-[#4B5563] w-5 flex-shrink-0 text-right font-mono select-none">
+                      {row}
+                    </span>
+
+                    {/* Seat buttons */}
+                    <div className="flex gap-1 flex-wrap">
+                      {rowSeats
+                        .sort((a, b) => a.number - b.number)
+                        .map((seat) => {
+                          const isSelected  = selectedIds.has(seat.id);
+                          const isPending   = pendingId === seat.id;
+                          const isUnavailable =
+                            seat.status !== "AVAILABLE" || localLocked.has(seat.id);
+
+                          // Build class list
+                          let cls =
+                            "w-7 h-7 rounded-lg text-[10px] font-bold transition-all select-none ";
+
+                          if (isPending) {
+                            cls += "bg-[#4B5563] text-[#94A3B8] animate-pulse cursor-wait";
+                          } else if (isSelected) {
+                            cls += "bg-[#E32636] text-white scale-110 shadow-md shadow-red-900/40";
+                          } else if (isUnavailable) {
+                            cls += "bg-[#2C2C2E] text-[#4B5563] opacity-50 cursor-not-allowed";
+                          } else {
+                            cls +=
+                              "bg-[#0891B2] hover:bg-[#0E7490] hover:scale-105 active:scale-95 text-white cursor-pointer";
+                          }
+
+                          return (
+                            <button
+                              key={seat.id}
+                              onClick={() => { void handleSeatClick(seat); }}
+                              disabled={isUnavailable || (pendingId !== null && !isPending)}
+                              aria-label={
+                                isUnavailable
+                                  ? `Место ${seat.number} — недоступно`
+                                  : `${seat.sector} Р${seat.row} М${seat.number} — ${seat.price.toLocaleString("ru-RU")} ₽`
+                              }
+                              aria-pressed={isSelected}
+                              title={`${seat.sector} · Ряд ${seat.row} · Место ${seat.number}${
+                                isUnavailable ? " (занято)" : ` — ${seat.price.toLocaleString("ru-RU")} ₽`
+                              }`}
+                              className={cls}
+                            >
+                              {seat.number}
+                            </button>
+                          );
+                        })}
+                    </div>
+                  </div>
+                ))}
+            </div>
+          </div>
+        );
+      })}
+
+      {/* ── Legend ── */}
+      <div className="flex gap-5 flex-wrap px-1 pt-1">
+        {[
+          { cls: "bg-[#0891B2]",  label: "Свободно" },
+          { cls: "bg-[#E32636]",  label: "Выбрано"  },
+          { cls: "bg-[#2C2C2E] opacity-50", label: "Занято" },
+        ].map(({ cls, label }) => (
+          <div key={label} className="flex items-center gap-1.5">
+            <span className={`w-3 h-3 rounded ${cls}`} />
+            <span className="text-[11px] text-[#8E8E93]">{label}</span>
+          </div>
+        ))}
+      </div>
+
+      {/* Transparent overlay blocking all clicks while a request is in flight */}
+      {pendingId !== null && (
+        <div className="absolute inset-0 z-10" style={{ cursor: "wait", pointerEvents: "all" }} />
+      )}
+    </div>
+  );
+}