fix: Revert logging to IndexedDB

[marcelklehr]

see #1947

[Copilot]

Pull Request Overview

This PR reverts logging to IndexedDB and instead saves logs using a new local-storage based approach.

• Logger.log now accumulates formatted log messages in a static array instead of writing to IndexedDB.
• New persist and getLogs methods in Logger load platform-specific storage modules to write/read logs from alternative storage.
• IndexedDB-related functionality in IndexedDB.ts is reduced, and Logger.persist is now invoked in Account.ts to save log data.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
src/lib/Logger.js	Removed direct IndexedDB logging; now pushes messages locally and persists them via platform-specific storage.
src/lib/IndexedDB.ts	Removed freeStorageIfNecessary logic and added a call to delete the IndexedDB on load.
src/lib/Account.ts	Added calls to Logger.persist after logging events to ensure logs are saved.