feat: add TableList component with styles and functionality for displaying database tables

feat: implement NewConnectionDialog component for creating and editing database connections with form validation

chore: generate TypeScript definitions and JavaScript bindings for app functions

chore: add models for configuration, connection requests, and database entities

internal/app/app.go

@@ -2,6 +2,7 @@ package app
 
 import (
 	"context"
+	"errors"
 	"time"
 
 	"go.uber.org/zap"
@@ -13,14 +14,25 @@ import (
 	"uzdb/internal/services"
 )
 
+// rootErrMsg unwraps the full error chain and returns the deepest error message.
+func rootErrMsg(err error) string {
+	for {
+		unwrapped := errors.Unwrap(err)
+		if unwrapped == nil {
+			return err.Error()
+		}
+		err = unwrapped
+	}
+}
+
 // App is the main application structure for Wails bindings
 type App struct {
-	ctx             context.Context
-	config          *config.Config
-	connectionSvc   *services.ConnectionService
-	querySvc        *services.QueryService
-	httpServer      *handler.HTTPServer
-	shutdownFunc    context.CancelFunc
+	ctx           context.Context
+	config        *config.Config
+	connectionSvc *services.ConnectionService
+	querySvc      *services.QueryService
+	httpServer    *handler.HTTPServer
+	shutdownFunc  context.CancelFunc
 }
 
 // NewApp creates a new App instance
@@ -44,7 +56,7 @@ func (a *App) Initialize(
 // OnStartup is called when the app starts (public method for Wails)
 func (a *App) OnStartup(ctx context.Context) {
 	a.ctx = ctx
-	
+
 	config.GetLogger().Info("Wails application started")
 }
 
@@ -124,6 +136,24 @@ func (a *App) DeleteConnection(id string) string {
 	return ""
 }
 
+// DisconnectConnection removes an active connection from the connection manager
+// Returns error message or empty string on success
+func (a *App) DisconnectConnection(id string) string {
+	if a.connectionSvc == nil {
+		return "Service not initialized"
+	}
+
+	err := a.connectionSvc.DisconnectConnection(a.ctx, id)
+	if err != nil {
+		config.GetLogger().Error("failed to disconnect connection",
+			zap.String("id", id),
+			zap.Error(err))
+		return err.Error()
+	}
+
+	return ""
+}
+
 // TestConnection tests a database connection
 // Returns (success, error_message)
 func (a *App) TestConnection(id string) (bool, string) {
@@ -137,14 +167,19 @@ func (a *App) TestConnection(id string) (bool, string) {
 		return false, err.Error()
 	}
 
-	return result.Success, result.Message
+	return result.Success, func() string {
+		if result.Success {
+			return ""
+		}
+		return result.Message
+	}()
 }
 
 // ExecuteQuery executes a SQL query on a connection
 // Returns query result or error message
 func (a *App) ExecuteQuery(connectionID, sql string) (*models.QueryResult, string) {
 	if a.connectionSvc == nil {
-		return nil, "Service not initialized"
+		return &models.QueryResult{Success: false, Error: "Service not initialized"}, ""
 	}
 
 	result, err := a.connectionSvc.ExecuteQuery(a.ctx, connectionID, sql)
@@ -153,7 +188,7 @@ func (a *App) ExecuteQuery(connectionID, sql string) (*models.QueryResult, strin
 			zap.String("connection_id", connectionID),
 			zap.String("sql", sql),
 			zap.Error(err))
-		return nil, err.Error()
+		return &models.QueryResult{Success: false, Error: rootErrMsg(err)}, ""
 	}
 
 	return result, ""
@@ -188,7 +223,7 @@ func (a *App) GetTableData(connectionID, tableName string, limit, offset int) (*
 			zap.String("connection_id", connectionID),
 			zap.String("table", tableName),
 			zap.Error(err))
-		return nil, err.Error()
+		return nil, rootErrMsg(err)
 	}
 
 	return result, ""
@@ -306,19 +341,19 @@ func (a *App) StartHTTPServer() string {
 // Shutdown gracefully shuts down the application
 func (a *App) Shutdown() {
 	config.GetLogger().Info("shutting down application")
-	
+
 	if a.shutdownFunc != nil {
 		a.shutdownFunc()
 	}
-	
+
 	if a.httpServer != nil {
 		ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 		defer cancel()
 		a.httpServer.Shutdown(ctx)
 	}
-	
+
 	// Close all database connections
 	database.CloseSQLite()
-	
+
 	config.Sync()
 }