v1.0.4

Prepare for publication on HACS

Fix: preserve dialogue in mixed responses (dialogue + commands)

Refactor command handlers to return results instead of directly adding to chat_log.
This allows _handle_mixed_response to combine dialogue and command results in a single message, preventing dialogue loss.

Changes:

• _handle_command_buffer: now returns Optional[str]
• _handle_multi_commands: now returns Optional[str]
• _handle_mixed_response: combines dialogue + command result before adding to chat_log

Full Changelog: v1.0.3...v1.0.4