refactor: Improve model configuration formatting and ensure consistent API key retrieval

app.py

@@ -16,18 +16,18 @@ import shutil
 MODELS = {
     "Qwen/Qwen2.5-Coder-32B-Instruct": {
         "base_url": "https://api-inference.huggingface.co/v1/",
-        "env_key": "HF_TOKEN"
+        "env_key": "HF_TOKEN",
     },
     "deepseek-ai/DeepSeek-V3": {
         "base_url": "https://api.deepseek.com/v1",
-        "env_key": "DEEPSEEK_API_KEY"
-    }
+        "env_key": "DEEPSEEK_API_KEY",
+    },
 }
 
 # Initialize client with first available model
 client = OpenAI(
     base_url=next(iter(MODELS.values()))["base_url"],
-    api_key=os.environ[next(iter(MODELS.values()))["env_key"]]
+    api_key=os.environ[next(iter(MODELS.values()))["env_key"]],
 )
 
 allowed_medias = [
@@ -169,7 +169,7 @@ YOUR FFMPEG COMMAND:
 
         if model_choice not in MODELS:
             raise ValueError(f"Model {model_choice} is not supported")
-            
+
         model_config = MODELS[model_choice]
         client.base_url = model_config["base_url"]
         client.api_key = os.environ[model_config["env_key"]]
@@ -347,7 +347,11 @@ with gr.Blocks() as demo:
                     "Use the image as the background with a waveform visualization for the audio positioned in center of the video. Make sure the waveform has a max height of 250 pixels.",
                     0.7,
                     0.1,
-                    list(MODELS.keys())[1] if len(MODELS) > 1 else list(MODELS.keys())[0],
+                    (
+                        list(MODELS.keys())[1]
+                        if len(MODELS) > 1
+                        else list(MODELS.keys())[0]
+                    ),
                 ],
                 [
                     [