fix: address CodeRabbit review findings

Author: datlechin

LocalPackages/CodeEditSourceEditor/Sources/CodeEditSourceEditor/CodeSuggestion/Model/SuggestionViewModel.swift

@@ -110,6 +110,7 @@ final class SuggestionViewModel: ObservableObject {
                     self.items = completionItems.items
                     self.selectedIndex = 0
                     self.syntaxHighlightedCache = [:]
+                    self.notifySelection()
                     showWindowOnParent(targetParentWindow, cursorRect)
                 }
             } catch {
@@ -143,6 +144,7 @@ final class SuggestionViewModel: ObservableObject {
         items = newItems
         selectedIndex = 0
         syntaxHighlightedCache = [:]
+        notifySelection()
     }
 
     func didSelect(item: CodeSuggestionEntry) {
@@ -162,9 +164,12 @@ final class SuggestionViewModel: ObservableObject {
     }
 
     func willClose() {
+        itemsRequestTask?.cancel()
+        itemsRequestTask = nil
         items.removeAll()
         selectedIndex = 0
         activeTextView = nil
+        delegate = nil
     }
 
     func syntaxHighlights(forIndex index: Int) -> NSAttributedString? {

LocalPackages/CodeEditSourceEditor/Sources/CodeEditSourceEditor/CodeSuggestion/Window/SuggestionController.swift

@@ -144,7 +144,15 @@ public final class SuggestionController: NSWindowController {
             queue: .main
         ) { [weak self] _ in
             guard let self else { return }
-            if self.model.activeTextView == nil || self.model.activeTextView?.view.window == nil {
+            guard let textView = self.model.activeTextView else {
+                self.close()
+                return
+            }
+            // Close if text view removed from window or lost first responder
+            if textView.view.window == nil {
+                self.close()
+            } else if let firstResponder = textView.view.window?.firstResponder as? NSView,
+                      !firstResponder.isDescendant(of: textView.view) {
                 self.close()
             }
         }

TablePro/Core/Autocomplete/SQLCompletionProvider.swift

@@ -494,6 +494,8 @@ final class SQLCompletionProvider {
     /// Filter and rank items by prefix, returning sorted results with match ranges
     func filterAndRank(_ items: [SQLCompletionItem], prefix: String, context: SQLContext) -> [SQLCompletionItem] {
         var filtered = filterByPrefix(items, prefix: prefix)
+        // Clear stale match ranges before recomputing
+        for i in filtered.indices { filtered[i].matchedRanges = [] }
         populateMatchRanges(&filtered, prefix: prefix)
         return rankResults(filtered, prefix: prefix, context: context)
     }