feat: Implement main application shell with navigation and color scheme toggle

- Added Appshell component with responsive navbar and main content area
- Integrated ColorSchemeToggle for light/dark mode switching
- Created Welcome component with styled title and introductory text
- Developed ChatPage for LLM interaction with WebSocket support
- Implemented Biblioteca for managing notes with rich text editor
- Added LoginPage for user authentication with error handling
- Introduced MessageList and MessageBubble components for chat messages
- Styled components with CSS modules for consistent design

domains/ConexionApis/Ollama_cliente.py

@@ -0,0 +1,62 @@
+import requests
+from domains.Credenciales.ollama_credencial import OllamaCredencial
+
+class OllamaCliente:
+    def __init__(self, credencial: OllamaCredencial):
+        """
+        Inicializa el cliente de Ollama con una instancia de OllamaCredencial.
+        """
+        self.credencial = credencial
+        self.base_url = self.credencial.base_url
+
+    # --- Chat Completions ---
+    def chat_completion(self, model: str, messages: list, stream: bool = False, **kwargs):
+        url = f"{self.base_url}/api/chat"
+        payload = {
+            "model": model,
+            "messages": messages,
+            "stream": stream,
+            **kwargs
+        }
+        response = requests.post(url, json=payload, stream=stream)
+        response.raise_for_status()
+
+        return self._handle_stream(response) if stream else response.json()
+
+    def _handle_stream(self, response):
+        for line in response.iter_lines():
+            if line:
+                try:
+                    parsed = line.decode("utf-8")
+                    # Extraer contenido si está en JSON como {"message":{"content":"..."},...}
+                    if parsed.startswith("{"):
+                        import json
+                        data = json.loads(parsed)
+                        if "message" in data and "content" in data["message"]:
+                            yield data["message"]["content"]
+                except Exception:
+                    continue
+
+    # --- Text Completion (legacy) ---
+    def completion(self, model: str, prompt: str, **kwargs):
+        url = f"{self.base_url}/api/generate"
+        payload = {
+            "model": model,
+            "prompt": prompt,
+            **kwargs
+        }
+        response = requests.post(url, json=payload)
+        response.raise_for_status()
+        return response.json()
+
+    # --- Embeddings ---
+    def embedding(self, model: str, input: str | list[str], **kwargs):
+        url = f"{self.base_url}/api/embeddings"
+        payload = {
+            "model": model,
+            "prompt": input,
+            **kwargs
+        }
+        response = requests.post(url, json=payload)
+        response.raise_for_status()
+        return response.json()