1

src/components/puzzle-runtime/PuzzleRuntimeShell.tsx

@@ -1,4 +1,14 @@
-import { ArrowLeft, ArrowRight, Clock, Loader2, Trophy } from 'lucide-react';
+import {
+  ArrowLeft,
+  ArrowRight,
+  Clock,
+  Eye,
+  Lightbulb,
+  Loader2,
+  Snowflake,
+  Sparkles,
+  Trophy,
+} from 'lucide-react';
 import { useEffect, useMemo, useRef, useState } from 'react';
 
 import type {
@@ -6,6 +16,8 @@ import type {
   PuzzleBoardSnapshot,
   PuzzleCellPosition,
   PuzzleMergedGroupState,
+  PuzzleRuntimeLevelSnapshot,
+  PuzzleRuntimePropKind,
   PuzzleRunSnapshot,
   SwapPuzzlePiecesRequest,
 } from '../../../packages/shared/src/contracts/puzzleRuntimeSession';
@@ -23,6 +35,11 @@ type PuzzleRuntimeShellProps = {
   onSwapPieces: (payload: SwapPuzzlePiecesRequest) => void;
   onDragPiece: (payload: DragPuzzlePieceRequest) => void;
   onAdvanceNextLevel: () => void;
+  onPauseChange?: (paused: boolean) => void | Promise<void>;
+  onUseProp?: (
+    propKind: PuzzleRuntimePropKind,
+  ) => Promise<PuzzleRunSnapshot | null | void>;
+  onTimeExpired?: () => void | Promise<void>;
 };
 
 type PuzzleBoardPieceViewModel = {
@@ -103,6 +120,13 @@ function resolveMergedPieceOutlineClass(
       buildLocalCellKey(groupPiece.localRow, groupPiece.localCol),
     ),
   );
+  const hasCell = (row: number, col: number) =>
+    groupCellKeys.has(buildLocalCellKey(row, col));
+  const hasTopBoundary = (row: number, col: number) => !hasCell(row - 1, col);
+  const hasRightBoundary = (row: number, col: number) => !hasCell(row, col + 1);
+  const hasBottomBoundary = (row: number, col: number) =>
+    !hasCell(row + 1, col);
+  const hasLeftBoundary = (row: number, col: number) => !hasCell(row, col - 1);
   const hasTopEdge = !groupCellKeys.has(
     buildLocalCellKey(piece.localRow - 1, piece.localCol),
   );
@@ -115,15 +139,63 @@ function resolveMergedPieceOutlineClass(
   const hasLeftEdge = !groupCellKeys.has(
     buildLocalCellKey(piece.localRow, piece.localCol - 1),
   );
+  const topLeftRadius =
+    hasTopEdge && hasLeftEdge
+      ? 'rounded-tl-[0.85rem]'
+      : (!hasTopEdge && !hasLeftEdge) ||
+          (hasTopEdge &&
+            !hasLeftEdge &&
+            !hasTopBoundary(piece.localRow, piece.localCol - 1)) ||
+          (hasLeftEdge &&
+            !hasTopEdge &&
+            !hasLeftBoundary(piece.localRow - 1, piece.localCol))
+        ? 'rounded-tl-[0.35rem]'
+        : 'rounded-tl-none';
+  const topRightRadius =
+    hasTopEdge && hasRightEdge
+      ? 'rounded-tr-[0.85rem]'
+      : (!hasTopEdge && !hasRightEdge) ||
+          (hasTopEdge &&
+            !hasRightEdge &&
+            !hasTopBoundary(piece.localRow, piece.localCol + 1)) ||
+          (hasRightEdge &&
+            !hasTopEdge &&
+            !hasRightBoundary(piece.localRow - 1, piece.localCol))
+        ? 'rounded-tr-[0.35rem]'
+        : 'rounded-tr-none';
+  const bottomRightRadius =
+    hasBottomEdge && hasRightEdge
+      ? 'rounded-br-[0.85rem]'
+      : (!hasBottomEdge && !hasRightEdge) ||
+          (hasBottomEdge &&
+            !hasRightEdge &&
+            !hasBottomBoundary(piece.localRow, piece.localCol + 1)) ||
+          (hasRightEdge &&
+            !hasBottomEdge &&
+            !hasRightBoundary(piece.localRow + 1, piece.localCol))
+        ? 'rounded-br-[0.35rem]'
+        : 'rounded-br-none';
+  const bottomLeftRadius =
+    hasBottomEdge && hasLeftEdge
+      ? 'rounded-bl-[0.85rem]'
+      : (!hasBottomEdge && !hasLeftEdge) ||
+          (hasBottomEdge &&
+            !hasLeftEdge &&
+            !hasBottomBoundary(piece.localRow, piece.localCol - 1)) ||
+          (hasLeftEdge &&
+            !hasBottomEdge &&
+            !hasLeftBoundary(piece.localRow + 1, piece.localCol))
+        ? 'rounded-bl-[0.35rem]'
+        : 'rounded-bl-none';
   return [
     hasTopEdge ? 'border-t-2' : 'border-t-0',
     hasRightEdge ? 'border-r-2' : 'border-r-0',
     hasBottomEdge ? 'border-b-2' : 'border-b-0',
     hasLeftEdge ? 'border-l-2' : 'border-l-0',
-    hasTopEdge && hasLeftEdge ? 'rounded-tl-[0.85rem]' : 'rounded-tl-none',
-    hasTopEdge && hasRightEdge ? 'rounded-tr-[0.85rem]' : 'rounded-tr-none',
-    hasBottomEdge && hasRightEdge ? 'rounded-br-[0.85rem]' : 'rounded-br-none',
-    hasBottomEdge && hasLeftEdge ? 'rounded-bl-[0.85rem]' : 'rounded-bl-none',
+    topLeftRadius,
+    topRightRadius,
+    bottomRightRadius,
+    bottomLeftRadius,
   ].join(' ');
 }
 
@@ -180,9 +252,82 @@ function formatElapsedMs(elapsedMs: number | null | undefined) {
     .padStart(2, '0')}`;
 }
 
+function formatTimerMs(value: number | null | undefined) {
+  const normalizedMs = Math.max(0, Math.ceil((value ?? 0) / 1000) * 1000);
+  const totalSeconds = Math.floor(normalizedMs / 1000);
+  const minutes = Math.floor(totalSeconds / 60);
+  const seconds = totalSeconds % 60;
+  return `${minutes}:${seconds.toString().padStart(2, '0')}`;
+}
+
+function resolveActiveFreezeElapsedMs(
+  level: PuzzleRuntimeLevelSnapshot,
+  nowMs: number,
+) {
+  if (!level.freezeStartedAtMs || !level.freezeUntilMs) {
+    return 0;
+  }
+  return Math.max(
+    0,
+    Math.min(nowMs, level.freezeUntilMs) - level.freezeStartedAtMs,
+  );
+}
+
+function resolveRuntimeRemainingMs(
+  level: PuzzleRuntimeLevelSnapshot,
+  nowMs: number,
+  uiPauseStartedAtMs: number | null,
+) {
+  if (level.status !== 'playing') {
+    return level.remainingMs;
+  }
+
+  const timeLimitMs = level.timeLimitMs || level.remainingMs;
+  const snapshotPauseElapsedMs = level.pauseStartedAtMs
+    ? Math.max(0, nowMs - level.pauseStartedAtMs)
+    : 0;
+  const optimisticPauseElapsedMs =
+    !level.pauseStartedAtMs && uiPauseStartedAtMs
+      ? Math.max(0, nowMs - uiPauseStartedAtMs)
+      : 0;
+  const effectiveElapsedMs = Math.max(
+    0,
+    nowMs -
+      level.startedAtMs -
+      level.pausedAccumulatedMs -
+      snapshotPauseElapsedMs -
+      optimisticPauseElapsedMs -
+      level.freezeAccumulatedMs -
+      resolveActiveFreezeElapsedMs(level, nowMs),
+  );
+
+  return Math.max(0, timeLimitMs - effectiveElapsedMs);
+}
+
 const DEFAULT_PUZZLE_MUSIC_VOLUME = 0.6;
 const PUZZLE_CLEAR_FLASH_DURATION_MS = 900;
 const PUZZLE_CLEAR_DIALOG_DELAY_MS = 500;
+const PUZZLE_MERGE_FLASH_DURATION_MS = 720;
+const PUZZLE_HINT_DEMO_DURATION_MS = 1_250;
+
+type PuzzlePropDialogState = {
+  propKind: PuzzleRuntimePropKind;
+  title: string;
+};
+
+type PuzzleMergeFlashState = {
+  key: string;
+  groupId: string;
+  leftPercent: number;
+  topPercent: number;
+};
+
+type PuzzleHintDemoState = {
+  key: string;
+  pieceIds: string[];
+  offsetXPercent: number;
+  offsetYPercent: number;
+};
 
 /**
  * 拼图运行时壳层。
@@ -196,10 +341,34 @@ export function PuzzleRuntimeShell({
   onSwapPieces,
   onDragPiece,
   onAdvanceNextLevel,
+  onPauseChange,
+  onUseProp,
+  onTimeExpired,
 }: PuzzleRuntimeShellProps) {
   const authUi = useAuthUi();
   const [selectedPieceId, setSelectedPieceId] = useState<string | null>(null);
   const [isSettingsPanelOpen, setIsSettingsPanelOpen] = useState(false);
+  const [propDialog, setPropDialog] = useState<PuzzlePropDialogState | null>(
+    null,
+  );
+  const [isOriginalOverlayVisible, setIsOriginalOverlayVisible] =
+    useState(false);
+  const [isFreezeEffectVisible, setIsFreezeEffectVisible] = useState(false);
+  const [isPropConfirming, setIsPropConfirming] = useState(false);
+  const [propConfirmError, setPropConfirmError] = useState<string | null>(null);
+  const [hintDemo, setHintDemo] = useState<PuzzleHintDemoState | null>(null);
+  const [mergeFlash, setMergeFlash] = useState<PuzzleMergeFlashState | null>(
+    null,
+  );
+  const [timerNowMs, setTimerNowMs] = useState(() => Date.now());
+  const [uiPauseStartedAtMs, setUiPauseStartedAtMs] = useState<number | null>(
+    null,
+  );
+  const onPauseChangeRef = useRef(onPauseChange);
+  const onTimeExpiredRef = useRef(onTimeExpired);
+  const previousUiPauseActiveRef = useRef(false);
+  const pauseChangePromiseRef = useRef<Promise<void>>(Promise.resolve());
+  const timeExpiredSyncKeyRef = useRef<string | null>(null);
   const dragSessionRef = useRef<{
     pieceId: string;
     pointerId: number;
@@ -229,9 +398,20 @@ export function PuzzleRuntimeShell({
   const [isClearResultReady, setIsClearResultReady] = useState(false);
   const clearPresentationKeyRef = useRef<string | null>(null);
   const clearPresentationTimeoutIdsRef = useRef<number[]>([]);
+  const mergeGroupSignatureRef = useRef<string | null>(null);
+  const hintDemoTimeoutRef = useRef<number | null>(null);
+  const mergeFlashTimeoutRef = useRef<number | null>(null);
   const boardRef = useRef<HTMLDivElement | null>(null);
   const currentLevel = run?.currentLevel ?? null;
   const board = currentLevel?.board ?? null;
+  const displayRemainingMs = currentLevel
+    ? resolveRuntimeRemainingMs(currentLevel, timerNowMs, uiPauseStartedAtMs)
+    : 0;
+  const runtimeStatus = currentLevel
+    ? currentLevel.status === 'playing' && displayRemainingMs <= 0
+      ? 'failed'
+      : currentLevel.status
+    : 'playing';
   const clearResultKey = currentLevel
     ? `${run?.runId ?? 'run'}:${currentLevel.profileId}:${currentLevel.levelIndex}`
     : null;
@@ -262,6 +442,23 @@ export function PuzzleRuntimeShell({
     return buildMergedGroupViewModels(board.mergedGroups, pieces);
   }, [board, pieces]);
 
+  const largestMovableGroup = useMemo(() => {
+    const groups = mergedGroups.filter((group) =>
+      group.pieces.some(
+        (piece) =>
+          piece.row !== piece.correctRow || piece.col !== piece.correctCol,
+      ),
+    );
+    return (
+      groups.sort(
+        (left, right) =>
+          right.pieceIds.length - left.pieceIds.length ||
+          left.minRow - right.minRow ||
+          left.minCol - right.minCol,
+      )[0] ?? null
+    );
+  }, [mergedGroups]);
+
   const mergedCellKeys = useMemo(
     () =>
       new Set(
@@ -284,6 +481,54 @@ export function PuzzleRuntimeShell({
     [pieces],
   );
 
+  useEffect(() => {
+    const signature =
+      board?.mergedGroups
+        .map(
+          (group) =>
+            `${group.groupId}:${group.pieceIds.slice().sort().join(',')}`,
+        )
+        .sort()
+        .join('|') ?? '';
+    const previousSignature = mergeGroupSignatureRef.current;
+    mergeGroupSignatureRef.current = signature;
+    if (!previousSignature || !board || currentLevel?.status !== 'playing') {
+      return;
+    }
+
+    const previousGroupSizes = new Map(
+      previousSignature
+        .split('|')
+        .filter(Boolean)
+        .map((entry) => {
+          const [groupId, pieceIds = ''] = entry.split(':');
+          return [groupId, pieceIds.split(',').filter(Boolean).length] as const;
+        }),
+    );
+    const newGroup = mergedGroups.find(
+      (group) =>
+        group.pieceIds.length > 1 &&
+        group.pieceIds.length > (previousGroupSizes.get(group.groupId) ?? 0),
+    );
+    if (!newGroup) {
+      return;
+    }
+
+    if (mergeFlashTimeoutRef.current !== null) {
+      window.clearTimeout(mergeFlashTimeoutRef.current);
+    }
+    setMergeFlash({
+      key: `${newGroup.groupId}:${Date.now()}`,
+      groupId: newGroup.groupId,
+      leftPercent:
+        ((newGroup.minCol + newGroup.colSpan / 2) / board.cols) * 100,
+      topPercent: ((newGroup.minRow + newGroup.rowSpan / 2) / board.rows) * 100,
+    });
+    mergeFlashTimeoutRef.current = window.setTimeout(() => {
+      setMergeFlash(null);
+    }, PUZZLE_MERGE_FLASH_DURATION_MS);
+  }, [board, currentLevel?.status, mergedGroups]);
+
   const resolvePieceCellElement = (pieceId: string) => {
     const pieceElement = pieceElementRefMap.current.get(pieceId) ?? null;
     const pieceCellElement =
@@ -447,6 +692,76 @@ export function PuzzleRuntimeShell({
     [],
   );
 
+  useEffect(() => {
+    onPauseChangeRef.current = onPauseChange;
+  }, [onPauseChange]);
+
+  useEffect(() => {
+    onTimeExpiredRef.current = onTimeExpired;
+  }, [onTimeExpired]);
+
+  const isUiPauseActive =
+    isSettingsPanelOpen || Boolean(propDialog) || isOriginalOverlayVisible;
+
+  useEffect(() => {
+    if (previousUiPauseActiveRef.current === isUiPauseActive) {
+      return;
+    }
+    previousUiPauseActiveRef.current = isUiPauseActive;
+    setUiPauseStartedAtMs((currentValue) =>
+      isUiPauseActive ? (currentValue ?? Date.now()) : null,
+    );
+    pauseChangePromiseRef.current = Promise.resolve(
+      onPauseChangeRef.current?.(isUiPauseActive),
+    ).catch(() => undefined);
+  }, [isUiPauseActive]);
+
+  useEffect(() => {
+    if (!currentLevel || currentLevel.status !== 'playing') {
+      return;
+    }
+
+    const timerId = window.setInterval(() => {
+      setTimerNowMs(Date.now());
+    }, 250);
+
+    return () => window.clearInterval(timerId);
+  }, [currentLevel?.levelIndex, currentLevel?.runId, currentLevel?.status]);
+
+  useEffect(() => {
+    if (!run || !currentLevel || currentLevel.status !== 'playing') {
+      return;
+    }
+    if (displayRemainingMs > 0) {
+      return;
+    }
+
+    const syncKey = `${run.runId}:${currentLevel.levelIndex}:${currentLevel.startedAtMs}`;
+    if (timeExpiredSyncKeyRef.current === syncKey) {
+      return;
+    }
+    timeExpiredSyncKeyRef.current = syncKey;
+    void onTimeExpiredRef.current?.();
+  }, [
+    currentLevel?.levelIndex,
+    currentLevel?.startedAtMs,
+    currentLevel?.status,
+    displayRemainingMs,
+    run?.runId,
+  ]);
+
+  useEffect(
+    () => () => {
+      if (hintDemoTimeoutRef.current !== null) {
+        window.clearTimeout(hintDemoTimeoutRef.current);
+      }
+      if (mergeFlashTimeoutRef.current !== null) {
+        window.clearTimeout(mergeFlashTimeoutRef.current);
+      }
+    },
+    [],
+  );
+
   useEffect(() => {
     if (!currentLevel || !clearResultKey) {
       clearPresentationKeyRef.current = null;
@@ -498,7 +813,7 @@ export function PuzzleRuntimeShell({
   }
 
   const handlePieceClick = (pieceId: string) => {
-    if (isBusy) {
+    if (isInteractionLocked) {
       return;
     }
 
@@ -585,7 +900,7 @@ export function PuzzleRuntimeShell({
     pieceId: string,
     event: React.PointerEvent<HTMLDivElement>,
   ) => {
-    if (isBusy) {
+    if (isInteractionLocked) {
       return;
     }
     event.preventDefault();
@@ -631,7 +946,18 @@ export function PuzzleRuntimeShell({
     scheduleDragVisual();
   };
 
-  const statusLabel = currentLevel.status === 'cleared' ? '已通关' : '进行中';
+  const draggingPieceId = dragRenderTarget?.pieceId ?? null;
+  const draggingGroupId = dragRenderTarget?.groupId ?? null;
+  const freezeRemainingMs =
+    currentLevel.freezeUntilMs && currentLevel.status === 'playing'
+      ? Math.max(0, currentLevel.freezeUntilMs - timerNowMs)
+      : 0;
+  const statusLabel =
+    runtimeStatus === 'cleared'
+      ? '已通关'
+      : runtimeStatus === 'failed'
+        ? '失败'
+        : '进行中';
   const nextAvailable =
     currentLevel.status === 'cleared' && Boolean(run.recommendedNextProfileId);
   const levelLabel = `第 ${currentLevel.levelIndex} 关`;
@@ -643,8 +969,85 @@ export function PuzzleRuntimeShell({
     currentLevel.status === 'cleared' &&
     dismissedClearKey !== clearResultKey &&
     isClearResultReady;
-  const draggingPieceId = dragRenderTarget?.pieceId ?? null;
-  const draggingGroupId = dragRenderTarget?.groupId ?? null;
+  const isInteractionLocked =
+    isBusy || runtimeStatus !== 'playing' || Boolean(propDialog);
+
+  const openPropDialog = (propKind: PuzzleRuntimePropKind, title: string) => {
+    if (runtimeStatus !== 'playing') {
+      return;
+    }
+    setPropConfirmError(null);
+    setPropDialog({ propKind, title });
+  };
+
+  const playHintDemo = () => {
+    const targetGroup = largestMovableGroup;
+    const targetPieces = targetGroup?.pieces ?? [];
+    const fallbackPiece = pieces.find(
+      (piece) =>
+        piece.row !== piece.correctRow || piece.col !== piece.correctCol,
+    );
+    const anchorPiece = targetPieces[0] ?? fallbackPiece ?? null;
+    if (!anchorPiece) {
+      return;
+    }
+    const pieceIds =
+      targetPieces.length > 0
+        ? targetPieces.map((piece) => piece.pieceId)
+        : [anchorPiece.pieceId];
+    const offsetXPercent =
+      ((anchorPiece.correctCol - anchorPiece.col) / board.cols) * 100;
+    const offsetYPercent =
+      ((anchorPiece.correctRow - anchorPiece.row) / board.rows) * 100;
+    setHintDemo({
+      key: `${anchorPiece.pieceId}:${Date.now()}`,
+      pieceIds,
+      offsetXPercent,
+      offsetYPercent,
+    });
+    if (hintDemoTimeoutRef.current !== null) {
+      window.clearTimeout(hintDemoTimeoutRef.current);
+    }
+    hintDemoTimeoutRef.current = window.setTimeout(() => {
+      setHintDemo(null);
+    }, PUZZLE_HINT_DEMO_DURATION_MS);
+  };
+
+  const handleConfirmProp = async () => {
+    if (!propDialog) {
+      return;
+    }
+    const propKind = propDialog.propKind;
+    setIsPropConfirming(true);
+    setPropConfirmError(null);
+    try {
+      await pauseChangePromiseRef.current;
+      const useResult = await onUseProp?.(propKind);
+      if (useResult === null) {
+        return;
+      }
+      setPropDialog(null);
+    } catch (error) {
+      setPropConfirmError(
+        error instanceof Error ? error.message : '使用拼图道具失败',
+      );
+      return;
+    } finally {
+      setIsPropConfirming(false);
+    }
+    if (propKind === 'hint') {
+      playHintDemo();
+    }
+    if (propKind === 'reference') {
+      setIsOriginalOverlayVisible(true);
+    }
+    if (propKind === 'freezeTime') {
+      setIsFreezeEffectVisible(true);
+      window.setTimeout(() => {
+        setIsFreezeEffectVisible(false);
+      }, 900);
+    }
+  };
 
   return (
     <div className="fixed inset-0 z-[100] flex justify-center bg-slate-950 text-white">
@@ -680,6 +1083,16 @@ export function PuzzleRuntimeShell({
               <div className="text-[11px] font-semibold tracking-[0.16em] text-amber-100/84">
                 {levelLabel}
               </div>
+              <div
+                className={`mt-1 inline-flex items-center gap-1 rounded-full px-2.5 py-1 font-mono text-xs font-black ${
+                  displayRemainingMs <= 20_000 && runtimeStatus === 'playing'
+                    ? 'bg-red-500/22 text-red-100'
+                    : 'bg-white/10 text-white/86'
+                }`}
+              >
+                <Clock className="h-3.5 w-3.5" />
+                {formatTimerMs(displayRemainingMs)}
+              </div>
             </div>
 
             <button
@@ -697,13 +1110,14 @@ export function PuzzleRuntimeShell({
           </div>
         </div>
 
-        <div className="absolute inset-0 flex items-center justify-center p-4 pt-24 pb-28">
+        <div className="absolute inset-0 flex items-center justify-center p-3 pt-28 pb-32 sm:p-4">
           <div
             ref={boardRef}
             data-testid="puzzle-board"
-            className="relative grid aspect-square w-full max-w-[min(92vw,92vh)] touch-none select-none rounded-[1.7rem] border border-white/12 bg-white/8 p-2 shadow-[0_30px_80px_rgba(0,0,0,0.35)] backdrop-blur-sm"
+            className="relative grid aspect-[9/16] w-full max-w-[min(96vw,calc(56.25vh_-_8.5rem))] touch-none select-none overflow-hidden rounded-[1.2rem] border border-white/16 bg-white/8 shadow-[0_30px_80px_rgba(0,0,0,0.35)] backdrop-blur-sm sm:rounded-[1.45rem]"
             style={{
               gridTemplateColumns: `repeat(${board.cols}, minmax(0, 1fr))`,
+              gridTemplateRows: `repeat(${board.rows}, minmax(0, 1fr))`,
             }}
           >
             {buildBoardCells(board).map((cell) => {
@@ -726,13 +1140,22 @@ export function PuzzleRuntimeShell({
                     pieceCellElementRefMap.current.delete(piece.pieceId);
                   }}
                   data-piece-cell-id={piece?.pieceId ?? undefined}
-                  className="relative p-1"
+                  className="relative"
                   style={{
                     zIndex: resolveDraggedPieceCellLayer(
                       piece?.pieceId,
                       draggingPieceId,
                       isMerged,
                     ),
+                    transform:
+                      piece && hintDemo?.pieceIds.includes(piece.pieceId)
+                        ? `translate(${hintDemo.offsetXPercent}%, ${hintDemo.offsetYPercent}%) scale(1.03)`
+                        : undefined,
+                    transition: hintDemo?.pieceIds.includes(
+                      piece?.pieceId ?? '',
+                    )
+                      ? `transform ${PUZZLE_HINT_DEMO_DURATION_MS}ms cubic-bezier(0.2, 0.8, 0.2, 1)`
+                      : undefined,
                   }}
                 >
                   <div
@@ -747,13 +1170,13 @@ export function PuzzleRuntimeShell({
                       pieceElementRefMap.current.delete(piece.pieceId);
                     }}
                     data-piece-id={piece?.pieceId ?? undefined}
-                    className={`relative flex h-full min-h-[4.5rem] items-center justify-center rounded-[1rem] border text-sm font-black transition ${
+                    className={`relative flex h-full items-center justify-center border-2 border-white/22 text-sm font-black transition ${
                       occupied
                         ? isSelected
                           ? 'border-amber-200 bg-amber-400/84 text-slate-950 shadow-[0_12px_30px_rgba(251,191,36,0.22)]'
                           : isMerged
                             ? 'border-transparent bg-transparent text-white'
-                            : 'border-white/18 bg-white/12 text-white'
+                            : 'bg-white/12 text-white'
                         : 'border-white/8 bg-black/18 text-white/20'
                     } ${
                       isMerged
@@ -792,7 +1215,7 @@ export function PuzzleRuntimeShell({
                     }}
                   >
                     {piece ? (
-                      <div className="relative h-full w-full overflow-hidden rounded-[0.92rem]">
+                      <div className="relative h-full w-full overflow-hidden">
                         {isMerged ? null : resolvedCoverImage ? (
                           <div
                             className="absolute inset-0"
@@ -833,12 +1256,22 @@ export function PuzzleRuntimeShell({
                   groupElementRefMap.current.delete(group.groupId);
                 }}
                 data-merged-group-id={group.groupId}
-                className="pointer-events-none absolute z-10 p-1"
+                className="pointer-events-none absolute z-10"
                 style={{
                   zIndex: resolveDraggedMergedGroupLayer(
                     group.groupId,
                     draggingGroupId,
                   ),
+                  transform: hintDemo?.pieceIds.some((pieceId) =>
+                    group.pieceIds.includes(pieceId),
+                  )
+                    ? `translate(${hintDemo.offsetXPercent}%, ${hintDemo.offsetYPercent}%) scale(1.02)`
+                    : undefined,
+                  transition: hintDemo?.pieceIds.some((pieceId) =>
+                    group.pieceIds.includes(pieceId),
+                  )
+                    ? `transform ${PUZZLE_HINT_DEMO_DURATION_MS}ms cubic-bezier(0.2, 0.8, 0.2, 1)`
+                    : undefined,
                   left: `${(group.minCol / board.cols) * 100}%`,
                   top: `${(group.minRow / board.rows) * 100}%`,
                   width: `${(group.colSpan / board.cols) * 100}%`,
@@ -855,7 +1288,7 @@ export function PuzzleRuntimeShell({
                   {group.pieces.map((piece) => (
                     <div
                       key={piece.pieceId}
-                      className={`pointer-events-auto relative touch-none overflow-hidden border-emerald-100/72 bg-emerald-300/10 shadow-[0_12px_30px_rgba(6,78,59,0.16)] ${resolveMergedPieceOutlineClass(
+                      className={`pointer-events-auto relative touch-none overflow-hidden border-white/22 bg-emerald-300/10 shadow-[0_12px_30px_rgba(6,78,59,0.16)] ${resolveMergedPieceOutlineClass(
                         group,
                         piece,
                       )}`}
@@ -906,17 +1339,86 @@ export function PuzzleRuntimeShell({
                 </div>
               </div>
             ))}
+            {isOriginalOverlayVisible && resolvedCoverImage ? (
+              <div
+                data-testid="puzzle-original-overlay"
+                className="pointer-events-none absolute inset-0 z-40 bg-black/10"
+              >
+                <div
+                  className="absolute inset-0 opacity-70"
+                  style={{
+                    backgroundImage: `url("${resolvedCoverImage}")`,
+                    backgroundSize: '100% 100%',
+                    backgroundPosition: 'center',
+                  }}
+                />
+              </div>
+            ) : null}
+            {mergeFlash ? (
+              <div
+                key={mergeFlash.key}
+                data-testid="puzzle-merge-flash"
+                className="pointer-events-none absolute z-50"
+                style={{
+                  left: `${mergeFlash.leftPercent}%`,
+                  top: `${mergeFlash.topPercent}%`,
+                }}
+              >
+                <div className="puzzle-merge-center-flash" />
+              </div>
+            ) : null}
           </div>
         </div>
 
-        <div className="absolute bottom-0 left-0 z-20 flex w-full items-end justify-end gap-3 px-4 py-4">
+        <div className="absolute bottom-0 left-0 z-20 flex w-full items-end justify-between gap-3 px-3 py-3 sm:px-4 sm:py-4">
+          <div className="flex items-center gap-2 rounded-full bg-black/32 p-1.5 backdrop-blur">
+            <button
+              type="button"
+              disabled={isInteractionLocked}
+              onClick={() => openPropDialog('hint', '使用提示')}
+              className="inline-flex h-12 min-w-16 flex-col items-center justify-center gap-0.5 rounded-full px-3 text-[11px] font-bold text-white/86 transition hover:bg-white/10 disabled:opacity-45"
+            >
+              <Lightbulb className="h-4 w-4 text-amber-100" />
+              提示
+            </button>
+            <button
+              type="button"
+              disabled={runtimeStatus !== 'playing'}
+              aria-pressed={isOriginalOverlayVisible}
+              onClick={() => {
+                if (isOriginalOverlayVisible) {
+                  setIsOriginalOverlayVisible(false);
+                  return;
+                }
+                openPropDialog('reference', '查看原图');
+              }}
+              className={`inline-flex h-12 min-w-16 flex-col items-center justify-center gap-0.5 rounded-full px-3 text-[11px] font-bold transition hover:bg-white/10 disabled:opacity-45 ${
+                isOriginalOverlayVisible
+                  ? 'bg-sky-200 text-slate-950'
+                  : 'text-white/86'
+              }`}
+            >
+              <Eye className="h-4 w-4" />
+              原图
+            </button>
+            <button
+              type="button"
+              disabled={isInteractionLocked}
+              onClick={() => openPropDialog('freezeTime', '冻结时间')}
+              className="inline-flex h-12 min-w-16 flex-col items-center justify-center gap-0.5 rounded-full px-3 text-[11px] font-bold text-white/86 transition hover:bg-white/10 disabled:opacity-45"
+            >
+              <Snowflake className="h-4 w-4 text-cyan-100" />
+              冻结
+            </button>
+          </div>
+
           <div className="flex flex-col items-end gap-2">
             {error ? (
               <div className="rounded-full bg-red-500/20 px-3 py-1 text-xs text-red-100">
                 {error}
               </div>
             ) : null}
-            {selectedPieceId && currentLevel.status !== 'cleared' ? (
+            {selectedPieceId && runtimeStatus === 'playing' ? (
               <div className="rounded-full bg-black/28 px-3 py-1 text-xs text-white/72 backdrop-blur">
                 已选择
               </div>
@@ -935,9 +1437,11 @@ export function PuzzleRuntimeShell({
               <div className="rounded-full bg-black/28 px-4 py-2 text-xs text-white/72 backdrop-blur">
                 {isBusy
                   ? '同步中...'
-                  : currentLevel.status === 'cleared'
+                  : runtimeStatus === 'cleared'
                     ? '等待下一关候选'
-                    : '完成整张图即可通关'}
+                    : runtimeStatus === 'failed'
+                      ? '本关失败'
+                      : '完成整张图即可通关'}
               </div>
             )}
           </div>
@@ -954,6 +1458,81 @@ export function PuzzleRuntimeShell({
           </div>
         ) : null}
 
+        {freezeRemainingMs > 0 || isFreezeEffectVisible ? (
+          <div
+            data-testid="puzzle-freeze-effect"
+            className="pointer-events-none absolute inset-0 z-30"
+          >
+            <div className="puzzle-freeze-effect-layer absolute inset-0 backdrop-saturate-150" />
+            <div className="absolute left-1/2 top-28 -translate-x-1/2 rounded-full border border-cyan-100/30 bg-cyan-950/50 px-3 py-1.5 font-mono text-xs font-black text-cyan-50 backdrop-blur">
+              {formatTimerMs(freezeRemainingMs)}
+            </div>
+          </div>
+        ) : null}
+
+        {propDialog ? (
+          <div
+            className="absolute inset-0 z-50 flex items-center justify-center bg-black/72 p-4 backdrop-blur-sm"
+            onClick={() => {
+              if (!isPropConfirming) {
+                setPropDialog(null);
+              }
+            }}
+          >
+            <section
+              role="dialog"
+              aria-modal="true"
+              aria-labelledby="puzzle-prop-confirm-title"
+              className="pixel-nine-slice pixel-modal-shell w-full max-w-[22rem] overflow-hidden shadow-[0_24px_80px_rgba(0,0,0,0.55)]"
+              style={getNineSliceStyle(UI_CHROME.modalPanel)}
+              onClick={(event) => event.stopPropagation()}
+            >
+              <header className="flex items-center gap-3 border-b border-white/10 px-5 py-4">
+                <span className="inline-flex h-9 w-9 items-center justify-center rounded-full bg-amber-200 text-slate-950">
+                  <Sparkles className="h-4 w-4" />
+                </span>
+                <h2
+                  id="puzzle-prop-confirm-title"
+                  className="text-sm font-black text-white"
+                >
+                  {propDialog.title}
+                </h2>
+              </header>
+              <div className="px-5 py-4 text-sm text-white/72">
+                消耗 1 陶泥币
+                {propConfirmError ? (
+                  <div className="mt-3 rounded-[0.9rem] border border-red-300/20 bg-red-500/12 px-3 py-2 text-xs leading-5 text-red-100">
+                    {propConfirmError}
+                  </div>
+                ) : null}
+              </div>
+              <footer className="flex items-center justify-end gap-3 border-t border-white/10 px-5 py-4">
+                <button
+                  type="button"
+                  onClick={() => setPropDialog(null)}
+                  disabled={isPropConfirming}
+                  className="rounded-full border border-white/12 bg-black/20 px-4 py-2 text-xs font-bold text-zinc-200 transition hover:text-white"
+                >
+                  取消
+                </button>
+                <button
+                  type="button"
+                  disabled={isPropConfirming}
+                  onClick={() => {
+                    void handleConfirmProp();
+                  }}
+                  className="inline-flex items-center gap-2 rounded-full bg-amber-200 px-5 py-2 text-sm font-black text-slate-950 transition hover:bg-amber-100 disabled:opacity-60"
+                >
+                  {isPropConfirming ? (
+                    <Loader2 className="h-3.5 w-3.5 animate-spin" />
+                  ) : null}
+                  确定
+                </button>
+              </footer>
+            </section>
+          </div>
+        ) : null}
+
         {isSettingsPanelOpen ? (
           <div
             className="absolute inset-0 z-50 flex items-center justify-center bg-black/72 p-3 backdrop-blur-sm sm:p-4"
@@ -1079,6 +1658,38 @@ export function PuzzleRuntimeShell({
           </div>
         ) : null}
 
+        {runtimeStatus === 'failed' ? (
+          <div className="absolute inset-0 z-40 flex items-center justify-center bg-slate-950/68 px-4 py-6 backdrop-blur-sm">
+            <section
+              role="dialog"
+              aria-modal="true"
+              aria-labelledby="puzzle-failed-title"
+              className="flex w-full max-w-[24rem] flex-col overflow-hidden rounded-[1.5rem] border border-white/14 bg-slate-950/94 shadow-[0_28px_90px_rgba(0,0,0,0.5)]"
+            >
+              <header className="border-b border-white/10 px-5 py-4">
+                <h2
+                  id="puzzle-failed-title"
+                  className="text-lg font-black text-white"
+                >
+                  关卡失败
+                </h2>
+                <div className="mt-1 text-xs text-white/62">
+                  {currentLevel.levelName}
+                </div>
+              </header>
+              <footer className="flex items-center justify-end border-t border-white/10 px-5 py-4">
+                <button
+                  type="button"
+                  onClick={onBack}
+                  className="rounded-full bg-amber-200 px-5 py-2.5 text-sm font-black text-slate-950 transition hover:bg-amber-100"
+                >
+                  返回
+                </button>
+              </footer>
+            </section>
+          </div>
+        ) : null}
+
         {isClearResultOpen ? (
           <div className="absolute inset-0 z-40 flex items-center justify-center bg-slate-950/68 px-4 py-6 backdrop-blur-sm">
             <section
@@ -1163,7 +1774,9 @@ export function PuzzleRuntimeShell({
                         ))
                       ) : (
                         <div className="flex min-h-24 items-center justify-center px-4 py-5 text-sm text-white/56">
-                          {isBusy ? '正在同步真实排行榜…' : '暂无真实排行榜成绩'}
+                          {isBusy
+                            ? '正在同步真实排行榜…'
+                            : '暂无真实排行榜成绩'}
                         </div>
                       )}
                     </div>