Mismatch between .env.example and code for Gemini API key variable

In the .env.example file, the environment variable is listed as GEMINI_API_KEY, but in the codebase it’s referenced as GOOGLE_GENERATIVE_AI_API_KEY.
This causes confusion and prevents Gemini from initializing correctly when following the example env file.

I'd like to take this up. Please assign it to me.

Compare the GEMINI_API_KEY entry in .env.example with the GOOGLE_GENERATIVE_AI_API_KEY references in the codebase. Search for all uses of both names, make the example and code consistent, and verify that Gemini initializes using the documented variable.

Written by the indexing model from the issue text.