update：优化稳定训练

src/pages/training/components/StabilityEnergyTrack.vue

@@ -14,6 +14,10 @@ const props = defineProps({
     type: Number,
     default: 0,
   },
+  introPending: {
+    type: Boolean,
+    default: false,
+  },
 });
 
 const WIDTH = 750;
@@ -33,30 +37,28 @@ const ENTRY_ANIMATION_DURATION = 1000;
 const UPDATE_DURATION = 240;
 const SWEEP_DELAY = 100;
 const SWEEP_DURATION = 1000;
-const ASSET_ROOT = "https://static.shelingxingqiu.com/shootmini/static/training-difficulty-design/stability-energy";
-const ASSET_VERSION = "20260922";
-const getAssetSource = (filename) =>
-  `${ASSET_ROOT}/${filename}?v=${ASSET_VERSION}`;
+const ASSET_ROOT =
+  "/pages/training/static/stability-energy";
+const getAssetSource = (filename) => `${ASSET_ROOT}/${filename}`;
 
 const instance = getCurrentInstance();
 const canvasId = `stability-energy-${Math.random().toString(36).slice(2, 10)}`;
 const canvasReady = ref(false);
+const fallbackVisible = ref(true);
 const normalizedPercent = computed(() =>
   Math.max(0, Math.min(100, Number(props.percent) || 0))
 );
-const shouldPlayEntryAnimation = ref(normalizedPercent.value <= 0);
-const fallbackImageSource = computed(
-  () =>
-    getAssetSource(
-      shouldPlayEntryAnimation.value ? "progress-full.png" : "progress-empty.png"
-    )
-);
 
 let engine = null;
 let disposed = false;
 let animationHandle = null;
-let renderedPercent = normalizedPercent.value;
+let renderedPercent = props.introPending ? 100 : normalizedPercent.value;
 let entryAnimationPlaying = false;
+let entryAnimationRequested = false;
+
+const showCanvas = () => {
+  canvasReady.value = true;
+};
 
 const requestFrame = (callback) => {
   if (typeof requestAnimationFrame === "function") {
@@ -81,6 +83,27 @@ const cancelFrame = () => {
   animationHandle = null;
 };
 
+const waitForPaint = () =>
+  new Promise((resolve) => {
+    const schedule = (callback) => {
+      if (typeof requestAnimationFrame === "function") {
+        requestAnimationFrame(callback);
+      } else {
+        setTimeout(callback, 16);
+      }
+    };
+    schedule(() => schedule(resolve));
+  });
+
+const presentCanvas = async () => {
+  showCanvas();
+  await nextTick();
+  await waitForPaint();
+  if (disposed) return false;
+  fallbackVisible.value = false;
+  return true;
+};
+
 const smoothStep = (value) => {
   const amount = Math.max(0, Math.min(1, value));
   return amount * amount * (3 - 2 * amount);
@@ -185,14 +208,11 @@ const loadCanvasImage = (canvas, source) =>
     image.src = source;
   });
 
-const createEnergyEngine = async (canvas) => {
+const createEnergyEngine = async (canvas, preloadedFullImage = null) => {
   const context = canvas.getContext("2d");
   if (!context) throw new Error("Canvas unavailable");
   enableImageSmoothing(context);
 
-  canvas.width = WIDTH;
-  canvas.height = HEIGHT;
-
   const maskLayer = createOffscreenCanvas(canvas, MASK_WIDTH, MASK_HEIGHT);
   const emptyLayer = createOffscreenCanvas(canvas);
   const fullLayer = createOffscreenCanvas(canvas);
@@ -208,7 +228,8 @@ const createEnergyEngine = async (canvas) => {
 
   const images = await Promise.all([
     loadCanvasImage(canvas, getAssetSource("progress-empty.png")),
-    loadCanvasImage(canvas, getAssetSource("progress-full.png")),
+    preloadedFullImage ||
+      loadCanvasImage(canvas, getAssetSource("progress-full.png")),
     loadCanvasImage(canvas, getAssetSource("progress-glow.png")),
   ]);
 
@@ -514,10 +535,11 @@ const drawPercent = (targetPercent, animate = true) => {
 const runEntryAnimation = () => {
   if (!engine || disposed) return;
   cancelFrame();
+  entryAnimationRequested = false;
   entryAnimationPlaying = true;
   renderedPercent = 100;
   engine.draw(100);
-  canvasReady.value = true;
+  showCanvas();
 
   let startedAt = null;
   const step = (timestamp) => {
@@ -537,7 +559,6 @@ const runEntryAnimation = () => {
 
     animationHandle = null;
     entryAnimationPlaying = false;
-    shouldPlayEntryAnimation.value = false;
     renderedPercent = 0;
     engine.draw(0);
 
@@ -565,36 +586,82 @@ const initialize = async () => {
 
   if (disposed) return;
   if (!info?.node?.getContext) {
-    shouldPlayEntryAnimation.value = false;
     return;
   }
   try {
-    engine = await createEnergyEngine(info.node);
+    const canvas = info.node;
+    canvas.width = WIDTH;
+    canvas.height = HEIGHT;
+    const context = canvas.getContext("2d");
+    if (!context) throw new Error("Canvas unavailable");
+    enableImageSmoothing(context);
+
+    let preloadedFullImage = null;
+    if (props.introPending) {
+      preloadedFullImage = await loadCanvasImage(
+        canvas,
+        getAssetSource("progress-full.png")
+      );
+      if (disposed) return;
+      context.clearRect(0, 0, WIDTH, HEIGHT);
+      context.drawImage(
+        preloadedFullImage,
+        0,
+        FULL_TRACK_OFFSET_Y,
+        WIDTH,
+        HEIGHT
+      );
+      renderedPercent = 100;
+      if (!(await presentCanvas())) return;
+      // 先让满能量首帧完成合成，再开始较重的遮罩和轨道计算。
+      await new Promise((resolve) => setTimeout(resolve, 0));
+      if (disposed) return;
+    }
+
+    engine = await createEnergyEngine(canvas, preloadedFullImage);
     if (disposed) return;
-    if (shouldPlayEntryAnimation.value) {
-      runEntryAnimation();
+    if (props.introPending || entryAnimationRequested) {
+      renderedPercent = 100;
+      engine.draw(100);
+      showCanvas();
+      if (!props.introPending && entryAnimationRequested) {
+        runEntryAnimation();
+      }
       return;
     }
     renderedPercent = normalizedPercent.value;
     engine.draw(renderedPercent);
-    canvasReady.value = true;
+    await presentCanvas();
   } catch (error) {
-    // Canvas 能力不可用时保留单张兜底图，不影响训练业务。
-    shouldPlayEntryAnimation.value = false;
     console.log("stability energy canvas unavailable", error);
   }
 };
 
 watch(normalizedPercent, (value) => {
-  if (!engine) {
-    // Canvas 初始化前已经恢复出真实能量时，视为重连并跳过入场归零动画。
-    if (value > 0) shouldPlayEntryAnimation.value = false;
-    return;
-  }
-  if (entryAnimationPlaying) return;
+  if (!engine || props.introPending || entryAnimationPlaying) return;
   drawPercent(value);
 });
 
+watch(
+  () => props.introPending,
+  (pending, wasPending) => {
+    if (pending) {
+      entryAnimationRequested = false;
+      if (!engine) return;
+      cancelFrame();
+      entryAnimationPlaying = false;
+      renderedPercent = 100;
+      engine.draw(100);
+      showCanvas();
+      return;
+    }
+    if (!wasPending) return;
+
+    entryAnimationRequested = true;
+    if (engine) runEntryAnimation();
+  }
+);
+
 onMounted(initialize);
 
 onBeforeUnmount(() => {
@@ -607,20 +674,18 @@ onBeforeUnmount(() => {
 <template>
   <view class="stability-energy-track" aria-label="稳定训练能量进度">
     <image
-      v-if="!canvasReady"
-      :class="[
-        'stability-energy-track__image',
-        shouldPlayEntryAnimation
-          ? 'stability-energy-track__image--full'
-          : '',
-      ]"
-      :src="fallbackImageSource"
-      mode="aspectFit"
+      v-if="fallbackVisible"
+      class="stability-energy-track__image"
+      :src="getAssetSource('progress-full.png')"
+      mode="scaleToFill"
     />
     <canvas
       :id="canvasId"
       :canvas-id="canvasId"
-      class="stability-energy-track__canvas"
+      :class="[
+        'stability-energy-track__canvas',
+        canvasReady ? 'stability-energy-track__canvas--ready' : '',
+      ]"
       type="2d"
       :width="WIDTH"
       :height="HEIGHT"
@@ -636,6 +701,7 @@ onBeforeUnmount(() => {
   height: 228rpx;
   margin: -164rpx 0 -80rpx;
   margin-left: -10rpx;
+  overflow: hidden;
   pointer-events: none;
 }
 
@@ -648,7 +714,17 @@ onBeforeUnmount(() => {
   height: 100%;
 }
 
-.stability-energy-track__image--full {
-  transform: translateY(-2.8rpx);
+.stability-energy-track__image {
+  z-index: 0;
+  transform: translateY(-3rpx);
+}
+
+.stability-energy-track__canvas {
+  z-index: 1;
+  opacity: 0;
+}
+
+.stability-energy-track__canvas--ready {
+  opacity: 1;
 }
 </style>

src/pages/training/practise-one.vue

@@ -49,6 +49,7 @@ const { user } = storeToRefs(store);
 const sound = ref(true);
 const start = ref(false);
 const practiceStarting = ref(false);
+const stabilityEnergyIntroPending = ref(false);
 const pageStages = Object.freeze({
   DISTANCE: "distance",
   SHOOTING: "shooting",
@@ -134,11 +135,14 @@ let shotPresentationGeneration = 0;
 let nextDifficultyRequest = null;
 let nextDifficultyRequestGeneration = 0;
 const audioWaiters = new Set();
+let stabilityEnergyIntroGeneration = 0;
+let stabilityEnergyIntroTimer = null;
 const shotEffectWaiters = new Map();
 const PRACTICE_SYNC_TIMEOUT_MS = 5000;
 const SHOT_EFFECT_WAIT_TIMEOUT_MS = 1200;
 const AUDIO_TIMEOUT_BASE = 3500;
 const AUDIO_TIMEOUT_PER_KEY = 2600;
+const STABILITY_ENERGY_ENTRY_DELAY_MS = 1000;
 const AUDIO_TIMEOUT_MAX = 12000;
 const RUNTIME_DIAGNOSTIC_INTERVAL_MS = 60000;
 let lastRuntimeDiagnosticAt = 0;
@@ -863,6 +867,12 @@ const playAudioKeysAndWait = (keys) => {
   });
 };
 
+const clearStabilityEnergyIntroTimer = () => {
+  if (!stabilityEnergyIntroTimer) return;
+  clearTimeout(stabilityEnergyIntroTimer);
+  stabilityEnergyIntroTimer = null;
+};
+
 const shouldWaitForShotEffect = (shot) => {
   const x = Number(shot?.x);
   const y = Number(shot?.y);
@@ -1405,6 +1415,9 @@ onLoad((options = {}) => {
       toRouteNumber(trainingContext.scoreSlot)
     ),
   };
+  // 稳定训练在测距阶段预挂载 Canvas，并提前绘制 100% 满能量首帧。
+  stabilityEnergyIntroPending.value =
+    trainingParams.value.type === "stability";
   practiseId.value = trainingContext.practiceId || "";
   serverAddr.value = trainingContext.serverAddr || "";
 
@@ -1450,15 +1463,30 @@ const onReady = async () => {
     scores.value = [];
     shotEffectToken.value = 0;
     initializeRhythmFirstRoundCountdown();
+    const shouldPlayStabilityEnergyIntro =
+      trainingType.value === "stability";
+    clearStabilityEnergyIntroTimer();
+    const stabilityIntroGeneration = ++stabilityEnergyIntroGeneration;
+    stabilityEnergyIntroPending.value = shouldPlayStabilityEnergyIntro;
+    const startAudioKey = getTrainingStartAudioKey(
+      trainingType.value,
+      "练习开始"
+    );
     start.value = true;
     pageStage.value = pageStages.SHOOTING;
     setPracticeAppHideResumable(true);
     // 先由本地锚点保证首轮立即显示，再用最新服务端快照无感校准。
     requestPracticeInfoSync();
-    // 开始接口成功即进入正式训练，直接播放对应提示，避免依赖 BattleStart 消息。
-    audioManager.play(
-      getTrainingStartAudioKey(trainingType.value, "练习开始")
-    );
+    // 开始语音只进入原播放队列，不参与能量条的入场计时。
+    audioManager.play(startAudioKey);
+    if (shouldPlayStabilityEnergyIntro) {
+      stabilityEnergyIntroTimer = setTimeout(() => {
+        stabilityEnergyIntroTimer = null;
+        if (stabilityIntroGeneration !== stabilityEnergyIntroGeneration) return;
+        if (!isShootingStage.value || !isStabilityTraining.value) return;
+        stabilityEnergyIntroPending.value = false;
+      }, STABILITY_ENERGY_ENTRY_DELAY_MS);
+    }
   } catch (error) {
     start.value = false;
     pageStage.value = pageStages.DISTANCE;
@@ -1649,6 +1677,9 @@ function onComplete() {
 
 async function onRetry() {
   pageStage.value = pageStages.LOADING;
+  clearStabilityEnergyIntroTimer();
+  stabilityEnergyIntroGeneration += 1;
+  stabilityEnergyIntroPending.value = isStabilityTraining.value;
   setPracticeAppHideResumable(false);
   clearHighlightTestTimer();
   useHighlightTest.value = false;
@@ -1761,6 +1792,9 @@ onMounted(() => {
 });
 
 onBeforeUnmount(() => {
+  clearStabilityEnergyIntroTimer();
+  stabilityEnergyIntroGeneration += 1;
+  stabilityEnergyIntroPending.value = false;
   setPracticeAppHideResumable(false);
   invalidateShotPresentations();
   clearPracticeRuntimeContext();
@@ -1856,6 +1890,7 @@ onBeforeUnmount(() => {
           <StabilityEnergyTrack
             v-if="isStabilityTraining"
             :percent="stabilityEnergyPercent"
+            :introPending="stabilityEnergyIntroPending"
           />
           <!-- <view v-if="env !== 'release'" class="highlight-test-actions">
             <button

src/websocket.js

@@ -79,6 +79,7 @@ function createWebSocket(token, onMessage) {
 
     const { data, event } = JSON.parse(res.data);
     if (event === "pong") return;
+    if (!data || typeof data !== "object") return;
     if (data.type) {
       if (ENABLE_REALTIME_MESSAGE_LOG) {
         console.log("收到 WebSocket 消息", getMessageTypeName(data.type));
@@ -86,7 +87,8 @@ function createWebSocket(token, onMessage) {
       if (onMessage) onMessage({ ...(data.data || {}), type: data.type });
       return;
     }
-    if (onMessage && data.updates) onMessage(data.updates);
+    if (!Array.isArray(data.updates)) return;
+    if (onMessage) onMessage(data.updates);
     const msg = data.updates[0];
     if (msg) {
       if (ENABLE_REALTIME_MESSAGE_LOG) {