added typeaheead and introspetion

DBSyn/App.swift

@@ -32,7 +32,7 @@ struct DBSynApp: App {
                     NSApplication.shared.orderFrontStandardAboutPanel(options: [
                         .applicationName: "DBSyn",
                         .applicationIcon: icon ?? NSApplication.shared.applicationIconImage,
-                        .version: "Phase 61",
+                        .version: Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString") as? String ?? "1.0",
                         .credits: NSAttributedString(string: "Native MySQL client for macOS")
                     ])
                 }

DBSyn/DatabaseModel.swift

@@ -462,7 +462,8 @@ final class DatabaseModel: ObservableObject {
                     columns[row[0], default: []].append(column)
                 }
                 // Ignore results from a connection that has been removed while loading.
-                guard profiles.contains(where: { $0.id == profile.id }) else { return }
+                guard profiles.contains(where: { $0.id == profile.id }),
+                      selected?.id == profile.id else { return }
                 let previous = introspections[key]
                 let current = SchemaIntrospection(
                     connectionID: profile.id, database: database,

DBSyn/MainView.swift

@@ -1553,10 +1553,9 @@ struct SQLTextView: NSViewRepresentable {
             let selection = editor.selectedRange()
             editor.string = text
 
-            let safeLocation = min(
-                selection.location,
-                (text as NSString).length
-            )
+            let safeLocation = selection.location == NSNotFound
+                ? 0
+                : min(selection.location, (text as NSString).length)
 
             editor.setSelectedRange(
                 NSRange(location: safeLocation, length: 0)
@@ -1579,6 +1578,7 @@ struct SQLTextView: NSViewRepresentable {
 
         deinit {
             pendingCompletion?.cancel()
+            suggestionPopover?.close()
             if let keyMonitor { NSEvent.removeMonitor(keyMonitor) }
         }
 
@@ -1617,7 +1617,10 @@ struct SQLTextView: NSViewRepresentable {
             let source = editor.string as NSString
             guard selection.location <= source.length else { dismissSuggestions(); return }
             let before = source.substring(to: selection.location)
-            let expression = try! NSRegularExpression(pattern: #"[A-Za-z_][A-Za-z0-9_]*$"#)
+            guard let expression = try? NSRegularExpression(pattern: #"[A-Za-z_][A-Za-z0-9_]*$"#) else {
+                dismissSuggestions()
+                return
+            }
             let beforeRange = NSRange(location: 0, length: (before as NSString).length)
             guard let match = expression.matches(in: before, range: beforeRange).last else { dismissSuggestions(); return }
             let prefix = (before as NSString).substring(with: match.range)
@@ -1678,7 +1681,8 @@ struct SQLTextView: NSViewRepresentable {
             if keyMonitor == nil {
                 keyMonitor = NSEvent.addLocalMonitorForEvents(matching: .keyDown) { [weak self, weak editor] event in
                     guard let self, let editor, self.suggestionPopover?.isShown == true,
-                          editor.window != nil else { return event }
+                          let window = editor.window, window.isKeyWindow,
+                          window.firstResponder === editor else { return event }
                     switch event.keyCode {
                     case 53: self.dismissSuggestions(); return nil // Escape
                     case 36, 48: self.acceptSuggestion(editor); return nil // Return / Tab

docs/PHASE70-UI-STABILITY.md

@@ -0,0 +1,21 @@
+# Phase 70 — UI and stability hardening
+
+This phase deliberately avoids adding new database-changing operations.
+
+## Editor stability
+- Avoids a forced regular-expression unwrap when preparing suggestions.
+- Prevents the SQL editor's local key monitor from consuming Enter, Tab, Escape or arrow keys when another control/window has focus.
+- Closes suggestion popovers and removes event monitors when the editor coordinator is released.
+- Handles invalid text-selection positions safely when SQL is updated programmatically.
+
+## Introspection consistency
+- Discards introspection results from a connection that is no longer selected, preventing an asynchronous response from applying a different connection's metadata to the active editor.
+
+## About panel
+- Reads the application version from its actual bundle metadata rather than displaying an obsolete phase label.
+
+## Verification still required on macOS
+- Build the Xcode scheme and test SQL editing, completion navigation and keyboard focus changes.
+- Switch connections during a long introspection request and confirm stale results are not shown.
+- Check System, Light and Dark appearance, and the existing graphs and administration screens.
+- Run live MySQL regression tests before treating this as a release candidate.