Chromium's crash reports reach the server, which logs each and files it in Sentry as a warning, and the page's own errors name the room and seat and leave extensions' failures out

A tab that crashes takes the page's error reporting down with it, so the
page never says so. Every page now names a default Reporting API endpoint,
/api/reports, where Chromium sends a crash report after the fact; the
server logs the room, the reason when one is given, and the browser, and
files a warning that rings no bell. Other report types are ignored, and an
address may send ten an hour.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0141G6xqLeNRYEtviLWSB5Up

packages/web/src/main.ts

@@ -10,7 +10,8 @@ if (import.meta.env.VITE_SENTRY_DSN) {
     environment: "production",
     // Facebook's in-app browser injects its own scripts (iabjs://) and
     // reports their failures as ours when the page unloads.
-    denyUrls: [/^iabjs:\/\//],
+    // Extensions run their own scripts in the page, and their failures are not ours.
+    denyUrls: [/^iabjs:\/\//, /^(chrome|moz|safari(-web)?)-extension:\/\//],
     ignoreErrors: ["Java object is gone"],
   });
 }

packages/web/src/net.svelte.ts

@@ -4,6 +4,7 @@ import type { ReplayStep } from "./catchup";
 import type { Command, GameEvent, GameView, Side } from "@wizwar/engine";
 import { cardDef, isPermanentDuration } from "@wizwar/engine";
 import { receiptFor } from "./receipt";
+import * as Sentry from "@sentry/browser";
 
 /** The same server over plain HTTP, for the one door a socket cannot carry: a picture. */
 const API_URL =
@@ -572,6 +573,8 @@ class Net {
         break;
       case "room":
         this.roomId = msg.roomId;
+        // An error report names the table it happened at, and from which seat.
+        Sentry.setTags({ room: msg.roomId, seat: this.spectating ? "gallery" : (this.you ?? "none") });
         this.roomColors = msg.colors ?? {};
         this.roomBots = msg.bots ?? {};
         this.standIns = msg.standIns ?? [];
@@ -1001,6 +1004,7 @@ class Net {
    * line, and wiping it would erase the only notice of why. */
   leaveLocal(): void {
     localStorage.removeItem(SEAT_KEY);
+    Sentry.setTags({ room: "none", seat: "none" });
     this.missedSteps = null;
     this.catchUp = null;
     this.pending = null;