[ChatGPT review]Improve first-time user experience with lightweight guidance

[s-takeuchi]

CmdFreak is intentionally minimal, which is a strength.
However, first-time users may benefit from minimal guidance to understand the workflow.

Suggested improvement

• Add a short welcome message or checklist:

1. Configure ODBC (Admin)

2. Select a table

3. Apply filters

• Keep this optional and dismissible to preserve the “quiet” UX philosophy.