feat: prevent downloading empty config

src/models/Config.tsx

@@ -171,4 +171,22 @@ export class Config {
     cloned.template = this.template;
     return cloned;
   }
+
+  /**
+   * Checks if config is empty (no environments or only DEFAULT with no params and empty template)
+   */
+  public isEmpty(): boolean {
+    if (this.envs.length === 0) {
+      return true;
+    }
+
+    // Check if only DEFAULT exists with no params
+    if (this.envs.length === 1 && this.envs[0].name === 'DEFAULT') {
+      const hasParams = this.envs[0].params.length > 0;
+      const hasTemplate = this.template.content.trim() && this.template.content !== '{}';
+      return !hasParams && !hasTemplate;
+    }
+
+    return false;
+  }
 }