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Fix upload stuck pending: validate blob readability before upload

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iOS Safari can evict blob data from IndexedDB while keeping the Blob
reference intact (instanceof/size checks pass but actual data read
fails). This caused upload POST to throw 'Load failed' client-side,
never reaching the server, burning retries endlessly.

Changes:
- Add validateBlobReadable() that reads first byte to verify data access
- If blob is unreadable, mark as 'failed' immediately with clear message
- Re-read photo from IndexedDB before upload for fresh blob reference
- Capture detailed error name/type in catch for better diagnostics
- Bump SW cache versions to v14/v10 to force new code delivery

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
kamaji
2026-02-07 15:56:06 -06:00
parent bc748d05ac
commit 1da3eea7b8
2 changed files with 52 additions and 13 deletions
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6
app/static/sw.js
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@@ -1,9 +1,9 @@
// NextSnap Service Worker
// Provides offline-first caching for the app shell
const CACHE_VERSION = 'nextsnap-v13';
const APP_SHELL_CACHE = 'nextsnap-shell-v9';
const RUNTIME_CACHE = 'nextsnap-runtime-v9';
const CACHE_VERSION = 'nextsnap-v14';
const APP_SHELL_CACHE = 'nextsnap-shell-v10';
const RUNTIME_CACHE = 'nextsnap-runtime-v10';
// Assets to cache on install
const APP_SHELL_ASSETS = [