fix: normalize WS URL trailing slash; fix ollama-cloud requires_api_key

- api.ts: strip trailing slashes from baseUrl in getStatusWebSocketUrl()
  to prevent double-slash paths (e.g. ws://host//ws/status)
- config.rs: requires_api_key for Ollama now returns true whenever
  api_key.is_some() (cloud mode) so validate() reliably rejects
  empty API keys for ollama-cloud configurations

Agent-Logs-Url: https://github.com/madkoding/fractalmind/sessions/29135fcd-d127-4638-af3b-a2125ab5d5e4

Co-authored-by: madkoding <333442+madkoding@users.noreply.github.com>

Author: Copilot

src/models/llm/config.rs

@@ -62,9 +62,8 @@ impl ModelProvider {
     /// Verifica si el proveedor requiere API key
     pub fn requires_api_key(&self) -> bool {
         match self {
-            ModelProvider::Ollama { api_key, .. } => {
-                api_key.as_ref().is_some_and(|k| !k.is_empty())
-            }
+            // Cloud Ollama (api_key: Some) always requires a non-empty key
+            ModelProvider::Ollama { api_key, .. } => api_key.is_some(),
             ModelProvider::OpenAI { .. } => true,
             ModelProvider::Anthropic { .. } => true,
             ModelProvider::HuggingFace { .. } => true,

ui/src/services/api.ts

@@ -256,7 +256,7 @@ class ApiClient {
 
   getStatusWebSocketUrl(): string {
     const wsProtocol = this.baseUrl.startsWith('https://') ? 'wss://' : 'ws://';
-    const normalizedBase = this.baseUrl.replace(/^https?:\/\//, '');
+    const normalizedBase = this.baseUrl.replace(/^https?:\/\//, '').replace(/\/+$/, '');
     return `${wsProtocol}${normalizedBase}/ws/status`;
   }