✨ ⬆️ Update Gemini 3.1 (#39)

Author: jeanphi-baconnais

src/main/resources/application.properties

@@ -1,7 +1,7 @@
 # Application Configuration
 app.gemini.model=gemini-3-flash-preview
-app.gemini.model.image=gemini-3-pro-image-preview
-app.gemini.model.veo=veo-3.0-fast-generate-preview
+app.gemini.model.image=gemini-3.1-flash-image-preview
+app.gemini.model.veo=veo-3.1-generate-preview
 
 # Template Configuration
 app.prompt=prompt