fix: release editor closures on destroy and reclaim malloc pages after teardown

Author: datlechin

TablePro/Views/Editor/SQLEditorCoordinator.swift

@@ -146,8 +146,21 @@ final class SQLEditorCoordinator: TextViewCoordinator {
         inlineSuggestionManager?.uninstall()
         inlineSuggestionManager = nil
 
+        // Release closure captures to break potential retain cycles
+        onCloseTab = nil
+        onExecuteQuery = nil
+        onAIExplain = nil
+        onAIOptimize = nil
+        onSaveAsFavorite = nil
+        schemaProvider = nil
+        contextMenu = nil
+        vimEngine = nil
+        vimCursorManager = nil
+
         EditorEventRouter.shared.unregister(self)
         cleanupMonitors()
+
+        Self.logger.debug("SQLEditorCoordinator destroyed")
     }
 
     // MARK: - AI Context Menu

TablePro/Views/Main/MainContentView.swift

@@ -272,7 +272,11 @@ struct MainContentView: View {
                     // If no more windows for this connection, disconnect.
                     // Tab state is NOT cleared here — it's preserved for next reconnect.
                     // Only handleTabsChange(count=0) clears state (user explicitly closed all tabs).
-                    guard !WindowLifecycleMonitor.shared.hasWindows(for: connectionId) else { return }
+                    guard !WindowLifecycleMonitor.shared.hasWindows(for: connectionId) else {
+                        // Hint malloc to return freed pages to the OS
+                        malloc_zone_pressure_relief(nil, 0)
+                        return
+                    }
 
                     let hasVisibleWindow = NSApp.windows.contains { window in
                         window.isVisible && (window.subtitle == connectionName
@@ -281,6 +285,11 @@ struct MainContentView: View {
                     if !hasVisibleWindow {
                         await DatabaseManager.shared.disconnectSession(connectionId)
                     }
+
+                    // Give SwiftUI/AppKit time to deallocate view hierarchies,
+                    // then hint malloc to return freed pages to the OS
+                    try? await Task.sleep(for: .seconds(2))
+                    malloc_zone_pressure_relief(nil, 0)
                 }
             }
             .onChange(of: pendingChangeTrigger) {