Add error handler and improve coverage

src/main.ts

@@ -87,6 +87,17 @@ export default class OllamaPlugin extends Plugin {
       return false;
     }
   }
+
+  // Notify all open ChatView instances when settings change
+  public notifyChatViews(): void {
+    const leaves = this.app.workspace.getLeavesOfType('ollama-chat-view');
+    leaves.forEach((leaf) => {
+      const view = leaf.view as ChatView;
+      if (view && view.onSettingsChange) {
+        view.onSettingsChange(this.settings);
+      }
+    });
+  }
 }
 
 class OllamaSettingTab extends PluginSettingTab {
@@ -115,6 +126,7 @@ class OllamaSettingTab extends PluginSettingTab {
             Logger.debug('URL changed to: ' + value, 'settings');
             this.plugin.settings.ollamaUrl = value;
             await this.plugin.saveSettings();
+            this.plugin.notifyChatViews();
           } else {
             Logger.warn('Invalid URL format: ' + urlValidation.error, 'settings');
             new Notice(urlValidation.error || 'Invalid Ollama URL format.');
@@ -132,6 +144,7 @@ class OllamaSettingTab extends PluginSettingTab {
             Logger.debug('Model changed to: ' + value, 'settings');
             this.plugin.settings.model = value;
             await this.plugin.saveSettings();
+            this.plugin.notifyChatViews();
           } else {
             Logger.warn('Invalid model name format: ' + modelValidation.error, 'settings');
             new Notice(modelValidation.error || 'Invalid model name format.');