fix(platform): close startup subscription handoff gaps

cocoscreator_projects/YouleNexus/assets/framework/platform/runtime.ts

@@ -138,20 +138,20 @@ export class PlatformRuntime {
     const generation = this.startupGeneration + 1;
     this.startupGeneration = generation;
     this.lifecycle = 'starting';
-    this.options.scene.showLoading();
-    this.requireActiveStartup(generation);
-    const resourcesReady = this.beginReadyTask(
-      'resources',
-      this.options.loadResources,
-      generation,
-    );
-    const minimumDisplayReady = this.beginReadyTask(
-      'minimum-display',
-      this.options.waitForMinimumDisplay,
-      generation,
-    );
 
     try {
+      this.options.scene.showLoading();
+      this.requireActiveStartup(generation);
+      const resourcesReady = this.beginReadyTask(
+        'resources',
+        this.options.loadResources,
+        generation,
+      );
+      const minimumDisplayReady = this.beginReadyTask(
+        'minimum-display',
+        this.options.waitForMinimumDisplay,
+        generation,
+      );
       this.requireActiveStartup(generation);
       const config = await this.options.resolveRuntimeConfig();
       this.requireActiveStartup(generation);
@@ -204,7 +204,7 @@ export class PlatformRuntime {
       this.router = router;
       this.wire = wire;
       this.requireActiveStartup(generation);
-      this.unsubscribeWire = wire.subscribe((event) => { this.onWireEvent(event); });
+      this.subscribeToWire(wire, generation);
       this.requireActiveStartup(generation);
       this.markReady('config');
       this.lifecycle = 'running';
@@ -443,6 +443,49 @@ export class PlatformRuntime {
     wire.stop();
   }
 
+  private subscribeToWire(wire: PlatformWireClient, generation: number): void {
+    let actualUnsubscribe: (() => void) | null = null;
+    let releaseRequested = false;
+    let released = false;
+    const temporaryOwner = (): void => {
+      if (released) return;
+      if (actualUnsubscribe === null) {
+        releaseRequested = true;
+        return;
+      }
+      released = true;
+      const unsubscribe = actualUnsubscribe;
+      actualUnsubscribe = null;
+      unsubscribe();
+    };
+
+    this.unsubscribeWire = temporaryOwner;
+    const returnedUnsubscribe: unknown = wire.subscribe(
+      (event) => { this.onWireEvent(event); },
+    );
+    if (typeof returnedUnsubscribe !== 'function') {
+      throw new TypeError(
+        'WireClient.subscribe must return an unsubscribe function',
+      );
+    }
+    actualUnsubscribe = returnedUnsubscribe as () => void;
+    if (!releaseRequested) return;
+
+    const cleanupErrors: unknown[] = [];
+    this.captureCleanupError(cleanupErrors, temporaryOwner);
+    if (cleanupErrors.length === 0) this.requireActiveStartup(generation);
+
+    const primary = this.fatalError
+      ?? new Error(`PlatformRuntime startup interrupted while ${this.lifecycle}`);
+    const failure = this.failureError(
+      'subscription handoff',
+      primary,
+      cleanupErrors,
+    );
+    if (this.fatalError !== null) this.fatalError = failure;
+    throw failure;
+  }
+
   private captureCleanupError(errors: unknown[], operation: () => void): void {
     try {
       operation();