fix(backend): standardize superset client init and auth

- Update plugins (debug, mapper, search) to explicitly map environment config to SupersetConfig
- Add authenticate method to SupersetClient for explicit session management
- Add get_environment method to ConfigManager
- Fix navbar dropdown hover stability in frontend with invisible bridge

backend/test_fix.py

@@ -0,0 +1,99 @@
+#!/usr/bin/env python3
+"""Test script to verify the fixes for SupersetClient initialization."""
+
+import sys
+sys.path.insert(0, '.')
+
+from src.core.config_manager import ConfigManager
+from src.core.config_models import Environment
+from src.plugins.search import SearchPlugin
+from src.plugins.mapper import MapperPlugin
+from src.plugins.debug import DebugPlugin
+
+def test_config_manager():
+    """Test ConfigManager methods."""
+    print("Testing ConfigManager...")
+    try:
+        config_manager = ConfigManager()
+        print(f"  ConfigManager initialized")
+        
+        # Test get_environment method
+        if hasattr(config_manager, 'get_environment'):
+            print(f"  get_environment method exists")
+            
+            # Add a test environment if none exists
+            if not config_manager.has_environments():
+                test_env = Environment(
+                    id="test-env",
+                    name="Test Environment",
+                    url="http://localhost:8088",
+                    username="admin",
+                    password="admin"
+                )
+                config_manager.add_environment(test_env)
+                print(f"  Added test environment: {test_env.name}")
+            
+            # Test retrieving environment
+            envs = config_manager.get_environments()
+            if envs:
+                test_env_id = envs[0].id
+                env_config = config_manager.get_environment(test_env_id)
+                print(f"  Successfully retrieved environment: {env_config.name}")
+                return True
+            else:
+                print(f"  No environments available (add one in settings)")
+                return False
+                
+    except Exception as e:
+        print(f"  Error: {e}")
+        return False
+
+def test_plugins():
+    """Test plugin initialization."""
+    print("\nTesting plugins...")
+    
+    plugins = [
+        ("Search Plugin", SearchPlugin()),
+        ("Mapper Plugin", MapperPlugin()),
+        ("Debug Plugin", DebugPlugin())
+    ]
+    
+    all_ok = True
+    
+    for name, plugin in plugins:
+        print(f"\nTesting {name}...")
+        try:
+            plugin_id = plugin.id
+            plugin_name = plugin.name
+            plugin_version = plugin.version
+            schema = plugin.get_schema()
+            
+            print(f"  ✓ ID: {plugin_id}")
+            print(f"  ✓ Name: {plugin_name}")
+            print(f"  ✓ Version: {plugin_version}")
+            print(f"  ✓ Schema: {schema}")
+            
+        except Exception as e:
+            print(f"  ✗ Error: {e}")
+            all_ok = False
+            
+    return all_ok
+
+def main():
+    """Main test function."""
+    print("=" * 50)
+    print("Superset Tools Fix Verification")
+    print("=" * 50)
+    
+    config_ok = test_config_manager()
+    plugins_ok = test_plugins()
+    
+    print("\n" + "=" * 50)
+    if config_ok and plugins_ok:
+        print("✅ All fixes verified successfully!")
+    else:
+        print("❌ Some tests failed")
+        sys.exit(1)
+
+if __name__ == "__main__":
+    main()