Fix Swift compilation errors for CI build

- Remove trailing comma in MainEditorContentView.swift function call
- Fix error handling in ImportService.swift by naming caught errors
- Add @mainactor annotations to DataGridView.swift methods accessing main actor-isolated properties
- Fix UUID double optional issue in TableProApp.swift
- Add @mainactor to saveAllTabStates() in AppDelegate.swift

These fixes resolve Swift 6 concurrency warnings and compilation errors.

Author: datlechin

TablePro/AppDelegate.swift

@@ -91,6 +91,7 @@ class AppDelegate: NSObject, NSApplicationDelegate {
     }
 
     /// Save tab state for all active sessions
+    @MainActor
     private func saveAllTabStates() {
         for (connectionId, session) in DatabaseManager.shared.activeSessions {
             if session.tabs.isEmpty {

TablePro/Core/Services/ImportService.swift

@@ -211,7 +211,7 @@ final class ImportService: ObservableObject {
             if config.wrapInTransaction {
                 do {
                     _ = try await driver.execute(query: rollbackStatement(for: connection.type))
-                } catch {
+                } catch let rollbackError {
                     // Rollback failed - database may be in inconsistent state
                     // This is a critical error that MUST be reported to the user
                     throw ImportError.rollbackFailed(rollbackError.localizedDescription)
@@ -225,7 +225,7 @@ final class ImportService: ObservableObject {
                 for stmt in fkEnableStmts {
                     do {
                         _ = try await driver.execute(query: stmt)
-                    } catch {
+                    } catch let fkError {
                         // FK re-enable failed - warn user but don't override original error
                         // Store this as a warning that should be shown alongside the original error
                         let message = fkError.localizedDescription

TablePro/TableProApp.swift

@@ -117,7 +117,7 @@ struct TableProApp: App {
 
         // Connection Form Window - opens when creating/editing a connection
         WindowGroup("Connection", id: "connection-form", for: UUID?.self) { $connectionId in
-            ConnectionFormView(connectionId: connectionId)
+            ConnectionFormView(connectionId: connectionId ?? nil)
         }
         .windowStyle(.hiddenTitleBar)
         .windowResizability(.contentSize)

TablePro/Views/Main/Child/MainEditorContentView.swift

@@ -297,8 +297,8 @@ struct MainEditorContentView: View {
             onLastPage: onLastPage,
             onLimitChange: onLimitChange,
             onOffsetChange: onOffsetChange,
-            onPaginationGo: onPaginationGo,
-            )
+            onPaginationGo: onPaginationGo
+        )
     }
 
     private func showStructureBinding(for tab: QueryTab) -> Binding<Bool> {

TablePro/Views/Results/DataGridView.swift

@@ -287,6 +287,7 @@ final class TableViewCoordinator: NSObject, NSTableViewDelegate, NSTableViewData
 
     // MARK: - Row Visual State Cache
 
+    @MainActor
     func rebuildVisualStateCache() {
         rowVisualStateCache.removeAll(keepingCapacity: true)
         guard changeManager.hasChanges else { return }
@@ -561,6 +562,7 @@ final class TableViewCoordinator: NSObject, NSTableViewDelegate, NSTableViewData
 
     // MARK: - Row Actions
 
+    @MainActor
     func undoDeleteRow(at index: Int) {
         changeManager.undoRowDeletion(rowIndex: index)
         tableView?.reloadData(
@@ -572,6 +574,7 @@ final class TableViewCoordinator: NSObject, NSTableViewDelegate, NSTableViewData
         onAddRow?()
     }
 
+    @MainActor
     func undoInsertRow(at index: Int) {
         onUndoInsert?(index)
         changeManager.undoRowInsertion(rowIndex: index)
@@ -602,6 +605,7 @@ final class TableViewCoordinator: NSObject, NSTableViewDelegate, NSTableViewData
         setCellValueAtColumn(value, at: rowIndex, columnIndex: columnIndex)
     }
 
+    @MainActor
     func setCellValueAtColumn(_ value: String?, at rowIndex: Int, columnIndex: Int) {
         guard let tableView = tableView else { return }
         guard columnIndex >= 0 && columnIndex < rowProvider.columns.count else { return }