Fix CI: resolve linting errors and test failures

app/src/git_commit_generator/ollama_client.py

@@ -1,9 +1,5 @@
 """Ollama client wrapper for LLM interactions."""
 import ollama as ollama_lib
-from typing import TYPE_CHECKING
-
-if TYPE_CHECKING:
-    from ollama import ChatResponse, ListResponse
 
 
 class OllamaClient:
@@ -113,7 +109,7 @@ class OllamaClient:
             List of available models with their details.
         """
         try:
-            response = ollama_lib.list()
+            response = ollama_client.list()
             return response.get("models", [])
         except Exception:
             return []
@@ -139,7 +135,7 @@ def get_ollama_client(host: str = "http://localhost:11434", model: str = "llama3
 
     Args:
         host: Ollama server URL.
-        model: Default model to use.
+        model: HTTP_HOST, model to use.
 
     Returns:
         OllamaClient instance.