fix(ai): Update Gemini model ID to gemini-1.5-flash-001

- Changes the model ID from the generic 'gemini-1.5-flash' to the specific 'gemini-1.5-flash-001'.
- This resolves the '404 NOT_FOUND' error where the API could not locate the generic model alias in the v1beta API version.

helpers.py

@@ -349,8 +349,8 @@ def call_gemini_flash(prompt, system_instruction=None, temperature=0.3, json_mod
         if json_mode:
             config["response_mime_type"] = "application/json"
 
-        # Der Modell-Name muss oft explizit sein, 'gemini-1.5-flash' ist Standard
-        model_id = "gemini-1.5-flash"
+        # Verwende eine spezifische Version, die oft stabiler ist
+        model_id = "gemini-1.5-flash-001"
 
         response = client.models.generate_content(
             model=model_id,
@@ -391,7 +391,7 @@ def call_openai_chat(prompt, temperature=0.3, model=None, response_format_json=F
         # NEU: Client Instanziierung
         client = genai.Client(api_key=api_key)
         
-        model_id = "gemini-1.5-flash" 
+        model_id = "gemini-1.5-flash-001" 
         
         response = client.models.generate_content(
             model=model_id,