Ignore canceled media range streams

src/server.ts

@@ -1253,6 +1253,10 @@ async function proxyAnalysisRequest(req: Request, res: Response) {
 
 const analysisProxy = (req: Request, res: Response, next: NextFunction) => {
   void proxyAnalysisRequest(req, res).catch((error: unknown) => {
+    const code = error instanceof Error ? (error as NodeJS.ErrnoException).code : undefined;
+    // Browsers cancel obsolete byte-range requests while seeking or changing cameras.
+    // Treat the resulting closed stream as a normal client disconnect.
+    if ((req.aborted || req.socket.destroyed) && code === "ERR_STREAM_PREMATURE_CLOSE") return;
     if (res.headersSent) return res.destroy(error instanceof Error ? error : undefined);
     console.error("Analysis API proxy failed", error);
     return res.status(502).json({ error: "The analysis service is unavailable." });