All store tests were passing file paths instead of Database objects
after the JSON-to-SQLite migration. Updated fixtures to create temp
Database instances, rewrote backup e2e tests for binary .db format,
and fixed config tests for the simplified StorageConfig.
- Add unfreeze_saves() to base_store.py and call it in e2e cleanup.
The backup restore flow calls freeze_saves() which sets a module-level
flag that silently disables all store _save() calls. Without reset,
this poisoned all subsequent persistence tests (9 failures).
- Fix os_listener toggle to use toggle-switch/toggle-slider CSS classes
instead of nonexistent switch/slider classes (was showing plain checkbox).
- Add mandatory test run to CLAUDE.md pre-commit checks.
All 341 tests now pass.
