feat: replace browser login with imported Reddit sessions

src/web/routes/debug.ts

@@ -1,29 +1,12 @@
 import { Router } from 'express';
-import path from 'path';
-import fs from 'fs';
 import type { WebContext } from '../context.js';
 
 export function createDebugRouter(ctx: WebContext): Router {
   const router = Router();
 
-  // Serves the screenshot dropped by the matrix token-extractor when the
-  // sniff times out (data/matrix-debug.png). Lets us see what chat.reddit.com
-  // looked like in the headed browser without needing host shell access.
-  router.get('/debug/matrix-debug.png', (_req, res) => {
-    const p = path.resolve(process.cwd(), 'data/matrix-debug.png');
-    if (!fs.existsSync(p)) {
-      res.status(404).json({ error: 'No matrix-debug.png yet — sniff has not failed since last clean start.' });
-      return;
-    }
-    const stat = fs.statSync(p);
-    res.set('Cache-Control', 'no-cache, no-store, must-revalidate');
-    res.set('X-Captured-At', stat.mtime.toISOString());
-    res.sendFile(p);
-  });
-
   // Dumps the browser context's cookies (names + metadata only — values are
   // hashed) so we can tell which session/OAuth cookies are set after the
-  // auto-login and which the chat surface might be missing.
+  // extension import and which the chat surface might be missing.
   router.get('/debug/cookies', async (req, res) => {
     const browser = ctx.services.browser;
     if (!browser) {