Function useCommandError

useCommandError(
    options?: { filter?: (cmd: Command) => boolean },
): {
    errors: Signal<ErrorEntry[]>;
    latestError: Signal<Error | null>;
    clearErrors: () => void;
    dispose: () => void;
}
useCommandError — component-scoped error boundary for command failures.

Subscribes to the bus and captures all failed command results reactively. Optional filter narrows which actions are tracked.
Parameters
- options: { filter?: (cmd: Command) => boolean } = {}
Returns {
    errors: Signal<ErrorEntry[]>;
    latestError: Signal<Error | null>;
    clearErrors: () => void;
    dispose: () => void;
}
Example
```
const { latestError, errors, clearErrors } = useCommandError()

// Only watch cart commands
const { latestError } = useCommandError({ filter: cmd => cmd.action.startsWith('cart') })
```
- Defined in chamber.ts:821