ci: support GEMINI_MODEL in auto-fix workflow and create_pr.py

Author: dkhawk

.github/scripts/create_pr.py

@@ -19,7 +19,8 @@
 import glob
 
 def get_gemini_response(api_key, prompt, json_mode=False):
-    url = f"https://generativelanguage.googleapis.com/v1beta/models/gemini-3.5-flash:generateContent?key={api_key}"
+    model = os.getenv("GEMINI_MODEL", "gemini-3.8-flash")
+    url = f"https://generativelanguage.googleapis.com/v1beta/models/{model}:generateContent?key={api_key}"
     headers = {'Content-Type': 'application/json'}
     data = {
         "contents": [{

.github/workflows/auto-fix.yml

@@ -61,6 +61,7 @@ jobs:
       - name: Run Auto-Fix Script
         env:
           GEMINI_API_KEY: ${{ secrets.GEMINI_API_KEY }}
+          GEMINI_MODEL: ${{ vars.GEMINI_MODEL }}
           ISSUE_TITLE: ${{ github.event.issue.title || github.event.inputs.title }}
           ISSUE_BODY: ${{ github.event.issue.body || github.event.inputs.body }}
           ISSUE_NUMBER: ${{ github.event.issue.number || github.event.inputs.number }}