fix: serialize WeatherV2 particle loads

packages/maplibre-particle-rn/CHANGELOG.md

@@ -6,6 +6,7 @@
 - 包含 WeatherColor、RasterParticle、HostField binary file ingress、Timeline / Playback 与 React Native WeatherRuntime。
 - Native/RN binary ingress 已在 STEP-061 验证；GSI + 真实 WeatherV2 + Particle Android 综合验证已在 STEP-062 完成。
 - 发布前 Consumer 验证修正 MLRN 依赖为 peer dependency，避免嵌套 native module 与 Windows codegen 长路径。
+- WeatherV2 HTTP 全帧加载增加按 map `reactTag` 的 single-flight 保护，避免重复点击造成并发 clear/submit 与非单调快照拒绝。
 - 新增纯 JS/TS WeatherV2 HTTP 客户端：manifest/time-index → WVECBIN1 full wind frame → canonical interleaved U/V。
 - 新增 `loadWeatherV2WindIntoRuntime()`：顺序下载、转换、写临时 binary file 并通过现有 WeatherRuntime 提交，不建立第二套 Timeline/MIX。
 - WeatherV2 文件存储通过 `WeatherV2BinaryFileStore` 注入，包本身不强依赖 Expo FileSystem，NavSea 可复用自己的缓存实现。

packages/maplibre-particle-rn/src/weatherV2/loadIntoWeatherRuntime.ts

@@ -21,7 +21,9 @@ function expectedSubmit(index: number): FieldSubmitResult {
  * U/V contract and submits it through the existing map-owned WeatherRuntime.
  * Core remains the sole owner of T0/T1/MIX and playback interpolation.
  */
-export async function loadWeatherV2WindIntoRuntime(
+const inFlightLoads = new Map<number, Promise<LoadWeatherV2WindResult>>();
+
+async function loadWeatherV2WindIntoRuntimeInternal(
   options: LoadWeatherV2WindOptions,
 ): Promise<LoadWeatherV2WindResult> {
   const { reactTag, client, fileStore } = options;
@@ -93,3 +95,20 @@ export async function loadWeatherV2WindIntoRuntime(
   }
   return { context, frames: loaded, runtime };
 }
+
+/**
+ * Serializes full WeatherV2 loads per map view. Repeated taps while a load is in flight
+ * reuse the same Promise instead of clearing/submitting a second overlapping timeline.
+ */
+export function loadWeatherV2WindIntoRuntime(
+  options: LoadWeatherV2WindOptions,
+): Promise<LoadWeatherV2WindResult> {
+  const existing = inFlightLoads.get(options.reactTag);
+  if (existing != null) return existing;
+
+  const task = loadWeatherV2WindIntoRuntimeInternal(options).finally(() => {
+    if (inFlightLoads.get(options.reactTag) === task) inFlightLoads.delete(options.reactTag);
+  });
+  inFlightLoads.set(options.reactTag, task);
+  return task;
+}