Profligate toast usage when changing thinking effort via hotkey

[kitlangton]

Cycling thinking effort with the hotkey shows a toast notification each time. The current level is already visible in the prompt bar, making the toast redundant.

HELP

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• New version installed notification spam #3500: New version installed notification spam (redundant notification issue)
• Toast notification doesn't follow theme colors #7831: Toast notification doesn't follow theme colors (toast notification issue)
• SAP AI Core reasoning models missing variant cycling support (Ctrl+T) #8752: SAP AI Core reasoning models missing variant cycling support (Ctrl+T) - related to cycling via hotkey

Feel free to ignore if none of these address your specific case.