POC: Update / indexed db account ops integration

[gergana95]

Issue is https://github.com/AmbireTech/ambire-app/issues/7264

In order to test properly with storage of accounOps please use a new browser instance and refer to the script mentioned here and load accountOps in your storage #2412

Testing Summary

1. Startup Performance (IDB with cursor-based early stopping)

Benchmarked Activity startup with 21,000 operations (3 accounts × 7 chains × 1,000 ops).

The implementation uses a timestamp index cursor per (account, chainId) group that stops reading after 20 finalized ops — only 525 out of 21,000 rows are touched at startup (2.5%). This replaces the previous load-all-then-trim approach.

The previous version (load all records → trim in JS) loaded startup data in ~1.0s. With cursor-based early stopping, the same 21,000-op dataset loads ~525 rows instead of 21,000 — a ~40× reduction in rows read — which should yield a proportionally faster startup in a real browser environment. The ~1.0s figure is no longer representative and should be re-benchmarked in the extension.

2. Lazy Pagination

• Stress-tested pagination with 21,000 operations.
• Startup and page navigation remained effectively instant, with only a one-time ~70ms fetch when expanding a chain for the first time.
• Identified and fixed issues related to redundant IDB fetches, incorrect page counts after chain switching, an IndexedDB cursor error, and a migration issue affecting chainId.
• After the fixes, pagination behaves correctly and scales well.

3. External/Internal Operation Deduplication

• Verified that external and internal operations cannot appear as duplicates in the Activity UI.
• Found a deduplication gap affecting operations outside the startup window, reproduced the issue, and fixed it by adding a merge-time deduplication filter.
• This provides a safety net even when the polling-based deduplication hasn’t run.

Overall

• ✅ IndexedDB provides significantly better startup performance than chrome.storage.local.
• ✅ Lazy pagination performs well on large datasets after the implemented fixes.
• ✅ Duplicate activity entries caused by internal/external operation overlap have been resolved.

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	fake-indexeddb@​6.2.5

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