Pipe winston logs to dashboard + add Matrix sniff debug route

The dashboard's /api/logs buffer only ever saw lines explicitly pushed
via broadcaster.push, so winston output (including the Matrix
token-extractor's timeout diagnostics) was invisible from the deployed
container. Attach a winston transport that forwards every entry into the
LogBroadcaster before the rest of bootstrap runs, so the matrix sniff's
`finalUrl=... hosts=[...]` line shows up in /api/logs.

Also serve data/matrix-debug.png (the screenshot the extractor drops on
timeout) at /api/debug/matrix-debug.png so we can see what
chat.reddit.com looked like in the headed browser without shell access
to the Dokploy host.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/bootstrap.ts

@@ -1,5 +1,6 @@
 import type { Config } from './config/index.js';
-import type { Logger } from './utils/logger.js';
+import { attachLogSink, type Logger } from './utils/logger.js';
+import { LogBroadcaster } from './web/log-broadcaster.js';
 import type Database from 'better-sqlite3';
 import { createDatabase, runMigrations } from './database/client.js';
 import {
@@ -73,6 +74,13 @@ export interface AppContainer {
  * shutdown).
  */
 export async function bootstrap(config: Config, logger: Logger): Promise<AppContainer> {
+  // Wire winston → dashboard log buffer immediately so the matrix-token
+  // sniff and other early bootstrap diagnostics are visible in /api/logs.
+  const broadcaster = new LogBroadcaster();
+  if (config.web.enabled) {
+    attachLogSink(logger, broadcaster);
+  }
+
   // Database
   const db = createDatabase(config);
   runMigrations(db);
@@ -258,6 +266,7 @@ export async function bootstrap(config: Config, logger: Logger): Promise<AppCont
       successfulMessagesRepo,
       activityLogRepo,
       logger,
+      broadcaster,
     );
 
     webServer.setChatService(chatService);