I believe I've found the new Gemini-centric "smart features" controls in Gmail, that also seem to include the "other apps" setting as well. If you click the gear, then All Settings, then scroll WAY DOWN in the General tab, there's a "Manage Workspace smart feature settings" bubble. If you click that, you'll see a pair of settings that appear to represent your choices during the forced dialogue modal popup I discussed in the original post on this thread. I can't be 100% sure, but that's how it appears to me currently. My recommendation: Make sure they are both OFF!