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fix: add server-side crash breadcrumbs and remove --drop:console from build

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The --drop:console esbuild flag was silently stripping all diagnostic
console.* calls from production builds, making crash investigation
impossible. Remove it temporarily for debugging.

Add server-side crash breadcrumb collection:
- Frontend writes breadcrumbs to localStorage AND POSTs to /api/crash-diag
- Server stores latest breadcrumbs in memory, readable via GET /api/crash-diag
- Granular breadcrumbs in selectSession: CACHE_WRITE, FETCH_START,
  FETCH_DONE, REWRITE, FOCUS, SELECT_DONE
- 2s heartbeat beacon so breadcrumbs survive tab freezes
- text/plain content-type parser for navigator.sendBeacon compatibility

Initial findings from breadcrumbs:
- Crash happens during selectSession() for sessions with large buffers
- Pattern: cached buffer exists from prior visit + live SSE data arriving
- Backend is always stable (0 crashes); this is a pure frontend issue

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
arkon
2026-03-05 16:44:17 +01:00
co-authored by Claude Opus 4.6
parent 4abe055182
commit 2b8a522cbd
3 changed files with 72 additions and 1 deletions
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scripts/build.mjs
+1 -1
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@@ -56,7 +56,7 @@ appendFileSync(
);
// 4. Minify frontend assets
run('minify app.js', 'npx esbuild dist/web/public/app.js --minify --drop:console --outfile=dist/web/public/app.js --allow-overwrite');
run('minify app.js', 'npx esbuild dist/web/public/app.js --minify --outfile=dist/web/public/app.js --allow-overwrite');
run('minify styles.css', 'npx esbuild dist/web/public/styles.css --minify --outfile=dist/web/public/styles.css --allow-overwrite');
run('minify mobile.css', 'npx esbuild dist/web/public/mobile.css --minify --outfile=dist/web/public/mobile.css --allow-overwrite');