### Problem
When configuration overrides are removed or changed for
`remote_control`, the automations previously registered by the card were
not updated, causing stale automations to remain active.
### Fix
Re-run the remote-control and automations loaders when the effective
configuration changes due to overrides so that automation
additions/removals reflect the current config.
#### What changed
- Modified: config-manager.ts
- Call `setKeyboardShortcutsFromConfig(this._api)`,
`setRemoteControlEntityFromConfig(this._api)` and
`setAutomationsFromConfig(this._api)` inside `_processOverrideConfig()`.
- Modified: `config-manager.test.ts`
- Added ConfigManager for test setup with real AutomationsManager and
ConditionStateManager
- Added test constants to centralize test data
- Expanded test coverage for override conditions:
- loaders should re-run when overrides change
- remote-control loader with overrides
#### Testing
- Full test suite run locally: 229 files, 2852 tests — all passing (with
TZ forced to 'UTC') ✅
