feat(ui): 🎨 Implement schema and table management screens

* Add schema management screen with list and editor
* Implement table management screen with list and editor
* Create data operations for schema and table management
* Define UI rules and guidelines for consistency
* Ensure circular tab navigation and keyboard shortcuts
* Add forms for creating and editing schemas and tables
* Implement confirmation dialogs for destructive actions

pkg/ui/database_screens.go

@@ -0,0 +1,72 @@
+package ui
+
+import (
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+)
+
+// showEditDatabaseForm displays a dialog to edit database properties
+func (se *SchemaEditor) showEditDatabaseForm() {
+	form := tview.NewForm()
+
+	dbName := se.db.Name
+	dbDescription := se.db.Description
+	dbComment := se.db.Comment
+	dbType := string(se.db.DatabaseType)
+	dbVersion := se.db.DatabaseVersion
+
+	// Database type options
+	dbTypeOptions := []string{"pgsql", "mssql", "sqlite"}
+	selectedTypeIndex := 0
+	for i, opt := range dbTypeOptions {
+		if opt == dbType {
+			selectedTypeIndex = i
+			break
+		}
+	}
+
+	form.AddInputField("Database Name", dbName, 40, nil, func(value string) {
+		dbName = value
+	})
+
+	form.AddInputField("Description", dbDescription, 50, nil, func(value string) {
+		dbDescription = value
+	})
+
+	form.AddInputField("Comment", dbComment, 50, nil, func(value string) {
+		dbComment = value
+	})
+
+	form.AddDropDown("Database Type", dbTypeOptions, selectedTypeIndex, func(option string, index int) {
+		dbType = option
+	})
+
+	form.AddInputField("Database Version", dbVersion, 20, nil, func(value string) {
+		dbVersion = value
+	})
+
+	form.AddButton("Save", func() {
+		if dbName == "" {
+			return
+		}
+		se.updateDatabase(dbName, dbDescription, dbComment, dbType, dbVersion)
+		se.pages.RemovePage("edit-database")
+		se.pages.RemovePage("main")
+		se.pages.AddPage("main", se.createMainMenu(), true, true)
+	})
+
+	form.AddButton("Back", func() {
+		se.pages.RemovePage("edit-database")
+	})
+
+	form.SetBorder(true).SetTitle(" Edit Database ").SetTitleAlign(tview.AlignLeft)
+	form.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.showExitConfirmation("edit-database", "main")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("edit-database", form, true, true)
+}