fix: UI/UX polish

TablePro/Views/Components/PaginationControlsView.swift

@@ -72,6 +72,11 @@ struct PaginationControlsView: View {
                 .foregroundStyle(.secondary)
                 .frame(minWidth: 60)
 
+            if pagination.isLoading {
+                ProgressView()
+                    .controlSize(.small)
+            }
+
             // Next page button
             Button(action: onNext) {
                 Image(systemName: "chevron.right")

TablePro/Views/Connection/ConnectionFormView.swift

@@ -973,11 +973,14 @@ struct ConnectionFormView: View { // swiftlint:disable:this type_body_length
                         if isTesting {
                             ProgressView()
                                 .controlSize(.small)
+                        } else if testSucceeded {
+                            Image(systemName: "checkmark.circle.fill")
+                                .foregroundStyle(.green)
                         } else {
-                            Image(systemName: testSucceeded ? "checkmark.circle.fill" : "bolt.horizontal")
-                                .foregroundStyle(testSucceeded ? .green : .secondary)
+                            Image(systemName: "bolt.horizontal")
+                                .foregroundStyle(.secondary)
                         }
-                        Text("Test Connection")
+                        Text(testSucceeded ? String(localized: "Connected") : String(localized: "Test Connection"))
                     }
                 }
                 .disabled(isTesting || isInstallingPlugin || !isValid)

TablePro/Views/Connection/OnboardingContentView.swift

@@ -110,28 +110,28 @@ struct OnboardingContentView: View {
             VStack(alignment: .leading, spacing: 16) {
                 featureRow(
                     icon: "cylinder.split.1x2",
-                    title: "MySQL, PostgreSQL & SQLite",
-                    description: "Connect to popular databases with full feature support"
+                    title: String(localized: "MySQL, PostgreSQL & SQLite"),
+                    description: String(localized: "Connect to popular databases with full feature support")
                 )
                 featureRow(
                     icon: "chevron.left.forwardslash.chevron.right",
-                    title: "Smart SQL Editor",
-                    description: "Syntax highlighting, autocomplete, and multi-tab editing"
+                    title: String(localized: "Smart SQL Editor"),
+                    description: String(localized: "Syntax highlighting, autocomplete, and multi-tab editing")
                 )
                 featureRow(
                     icon: "tablecells",
-                    title: "Interactive Data Grid",
-                    description: "Browse, edit, and manage your data with ease"
+                    title: String(localized: "Interactive Data Grid"),
+                    description: String(localized: "Browse, edit, and manage your data with ease")
                 )
                 featureRow(
                     icon: "lock.shield",
-                    title: "Secure Connections",
-                    description: "SSH tunneling and SSL/TLS encryption support"
+                    title: String(localized: "Secure Connections"),
+                    description: String(localized: "SSH tunneling and SSL/TLS encryption support")
                 )
                 featureRow(
                     icon: "brain",
-                    title: "AI-Powered Assistant",
-                    description: "Get intelligent SQL suggestions and query assistance"
+                    title: String(localized: "AI-Powered Assistant"),
+                    description: String(localized: "Get intelligent SQL suggestions and query assistance")
                 )
             }
             .padding(.horizontal, 20)

TablePro/Views/Connection/WelcomeLeftPanel.swift

@@ -17,7 +17,7 @@ struct WelcomeLeftPanel: View {
                 Image(nsImage: NSApp.applicationIconImage)
                     .resizable()
                     .frame(width: 80, height: 80)
-                    .shadow(color: Color(red: 1.0, green: 0.576, blue: 0.0).opacity(0.4), radius: 20, x: 0, y: 0)
+                    .shadow(color: Color.accentColor.opacity(0.4), radius: 20, x: 0, y: 0)
 
                 VStack(spacing: 6) {
                     Text("TablePro")

TablePro/Views/Editor/AIEditorContextMenu.swift

@@ -16,6 +16,7 @@ final class AIEditorContextMenu: NSMenu, NSMenuDelegate {
     var onExplainWithAI: ((String) -> Void)?
     var onOptimizeWithAI: ((String) -> Void)?
     var onSaveAsFavorite: ((String) -> Void)?
+    var onFormatSQL: (() -> Void)?
 
     override init(title: String) {
         super.init(title: title)
@@ -49,6 +50,18 @@ final class AIEditorContextMenu: NSMenu, NSMenuDelegate {
 
         menu.addItem(.separator())
 
+        let formatItem = NSMenuItem(
+            title: String(localized: "Format SQL"),
+            action: #selector(handleFormatSQL),
+            keyEquivalent: ""
+        )
+        formatItem.target = self
+        formatItem.image = NSImage(systemSymbolName: "text.alignleft", accessibilityDescription: nil)
+        formatItem.isEnabled = (fullText?()?.isEmpty == false) && (onFormatSQL != nil)
+        menu.addItem(formatItem)
+
+        menu.addItem(.separator())
+
         let saveAsFavItem = NSMenuItem(
             title: String(localized: "Save as Favorite..."),
             action: #selector(handleSaveAsFavorite),
@@ -95,6 +108,10 @@ final class AIEditorContextMenu: NSMenu, NSMenuDelegate {
         onOptimizeWithAI?(text)
     }
 
+    @objc private func handleFormatSQL() {
+        onFormatSQL?()
+    }
+
     @objc private func handleSaveAsFavorite() {
         if let text = selectedText?(), !text.isEmpty {
             onSaveAsFavorite?(text)

TablePro/Views/Editor/QueryEditorView.swift

@@ -54,7 +54,8 @@ struct QueryEditorView: View {
                 onExecuteQuery: onExecuteQuery,
                 onAIExplain: onAIExplain,
                 onAIOptimize: onAIOptimize,
-                onSaveAsFavorite: onSaveAsFavorite
+                onSaveAsFavorite: onSaveAsFavorite,
+                onFormatSQL: formatQuery
             )
             .frame(minHeight: 100)
             .clipped()

TablePro/Views/Editor/SQLEditorCoordinator.swift

@@ -47,6 +47,7 @@ final class SQLEditorCoordinator: TextViewCoordinator {
     @ObservationIgnored var onAIExplain: ((String) -> Void)?
     @ObservationIgnored var onAIOptimize: ((String) -> Void)?
     @ObservationIgnored var onSaveAsFavorite: ((String) -> Void)?
+    @ObservationIgnored var onFormatSQL: (() -> Void)?
 
     /// Whether the editor text view is currently the first responder.
     /// Used to guard cursor propagation — when the find panel highlights
@@ -207,6 +208,7 @@ final class SQLEditorCoordinator: TextViewCoordinator {
         menu.onExplainWithAI = { [weak self] text in self?.onAIExplain?(text) }
         menu.onOptimizeWithAI = { [weak self] text in self?.onAIOptimize?(text) }
         menu.onSaveAsFavorite = { [weak self] text in self?.onSaveAsFavorite?(text) }
+        menu.onFormatSQL = { [weak self] in self?.onFormatSQL?() }
         contextMenu = menu
     }
 

TablePro/Views/Editor/SQLEditorView.swift

@@ -26,6 +26,7 @@ struct SQLEditorView: View {
     var onAIExplain: ((String) -> Void)?
     var onAIOptimize: ((String) -> Void)?
     var onSaveAsFavorite: ((String) -> Void)?
+    var onFormatSQL: (() -> Void)?
 
     @State private var editorState = SourceEditorState()
     @State private var completionAdapter: SQLCompletionAdapter?
@@ -104,6 +105,7 @@ struct SQLEditorView: View {
                 coordinator.onAIExplain = onAIExplain
                 coordinator.onAIOptimize = onAIOptimize
                 coordinator.onSaveAsFavorite = onSaveAsFavorite
+                coordinator.onFormatSQL = onFormatSQL
                 setupFavoritesObserver()
             }
         } else {
@@ -118,6 +120,7 @@ struct SQLEditorView: View {
                     coordinator.onAIExplain = onAIExplain
                     coordinator.onAIOptimize = onAIOptimize
                     coordinator.onSaveAsFavorite = onSaveAsFavorite
+                    coordinator.onFormatSQL = onFormatSQL
                     setupFavoritesObserver()
                     editorReady = true
                 }

TablePro/Views/Export/ExportDialog.swift

@@ -274,6 +274,13 @@ struct ExportDialog: View {
 
                         Spacer()
                     }
+
+                    let description = formatDescription(for: config.formatId)
+                    if !description.isEmpty {
+                        Text(description)
+                            .font(.system(size: ThemeEngine.shared.activeTheme.typography.small))
+                            .foregroundStyle(.secondary)
+                    }
                 }
 
                 // Selection count or Pro gate message
@@ -430,6 +437,17 @@ struct ExportDialog: View {
     private static let formatDisplayOrder = ["csv", "json", "sql", "xlsx", "mql"]
     private static let proFormatIds: Set<String> = ["xlsx"]
 
+    private func formatDescription(for formatId: String) -> String {
+        switch formatId {
+        case "csv": return String(localized: "Comma-separated values. Compatible with Excel and most tools.")
+        case "json": return String(localized: "Structured data format. Ideal for APIs and web applications.")
+        case "sql": return String(localized: "SQL INSERT statements. Use to recreate data in another database.")
+        case "xlsx": return String(localized: "Excel spreadsheet with formatting support.")
+        case "mql": return String(localized: "MongoDB query language. Use to import into MongoDB.")
+        default: return ""
+        }
+    }
+
     private func isProGatedFormat(_ formatId: String) -> Bool {
         Self.proFormatIds.contains(formatId) && !LicenseManager.shared.isFeatureAvailable(.xlsxExport)
     }

TablePro/Views/Filter/FilterPanelView.swift

@@ -98,10 +98,18 @@ struct FilterPanelView: View {
             TextField("Preset Name", text: $newPresetName)
             Button("Cancel", role: .cancel) {}
             Button("Save") {
-                if !newPresetName.isEmpty {
-                    filterState.saveAsPreset(name: newPresetName)
-                    loadPresets()
+                guard !newPresetName.isEmpty else { return }
+                var finalName = newPresetName
+                let existingNames = Set(savedPresets.map(\.name))
+                if existingNames.contains(finalName) {
+                    var counter = 2
+                    while existingNames.contains("\(newPresetName) (\(counter))") {
+                        counter += 1
+                    }
+                    finalName = "\(newPresetName) (\(counter))"
                 }
+                filterState.saveAsPreset(name: finalName)
+                loadPresets()
             }
         } message: {
             Text("Enter a name for this filter preset")

TablePro/Views/Import/ImportDialog.swift

@@ -33,6 +33,7 @@ struct ImportDialog: View {
     @State private var importResult: PluginImportResult?
     @State private var importError: (any Error)?
 
+    @State private var hasPreviewError = false
     @State private var tempPreviewURL: URL?
     @State private var loadFileTask: Task<Void, Never>?
 
@@ -276,7 +277,7 @@ struct ImportDialog: View {
                 performImport()
             }
             .buttonStyle(.borderedProminent)
-            .disabled(fileURL == nil || importServiceState.isImporting || availableFormats.isEmpty)
+            .disabled(fileURL == nil || importServiceState.isImporting || availableFormats.isEmpty || hasPreviewError)
             .keyboardShortcut(.return, modifiers: [])
         }
         .padding(16)
@@ -305,12 +306,14 @@ struct ImportDialog: View {
     @MainActor
     private func loadFile(_ url: URL) async {
         cleanupTempFiles()
+        hasPreviewError = false
 
         var isDirectory: ObjCBool = false
         guard FileManager.default.fileExists(atPath: url.path(percentEncoded: false), isDirectory: &isDirectory),
             !isDirectory.boolValue
         else {
             filePreview = String(localized: "Error: Selected path is not a regular file")
+            hasPreviewError = true
             return
         }
 
@@ -331,7 +334,8 @@ struct ImportDialog: View {
                 tempPreviewURL = urlToRead
             }
         } catch {
-            filePreview = String(localized: "Failed to decompress file: \(error.localizedDescription)")
+            filePreview = "Failed to decompress file: \(error.localizedDescription)"
+            hasPreviewError = true
             return
         }
 
@@ -350,11 +354,14 @@ struct ImportDialog: View {
 
             if let preview = String(data: previewData, encoding: selectedEncoding.encoding) {
                 filePreview = preview
+                hasPreviewError = false
             } else {
-                filePreview = String(localized: "Failed to load preview using encoding: \(selectedEncoding.rawValue). Try selecting a different text encoding.")
+                filePreview = "Failed to load preview using encoding: \(selectedEncoding.rawValue). Try selecting a different text encoding."
+                hasPreviewError = true
             }
         } catch {
-            filePreview = String(localized: "Failed to load preview: \(error.localizedDescription)")
+            filePreview = "Failed to load preview: \(error.localizedDescription)"
+            hasPreviewError = true
         }
 
         Task {

TablePro/Views/Main/Child/MainEditorContentView.swift

@@ -355,7 +355,14 @@ struct MainEditorContentView: View {
                         Divider()
                     }
 
-                    dataGridView(tab: tab)
+                    if tab.tabType == .query && !tab.resultColumns.isEmpty
+                        && tab.resultRows.isEmpty && tab.lastExecutedAt != nil
+                        && !tab.isExecuting && !filterStateManager.hasAppliedFilters
+                    {
+                        emptyResultView(executionTime: tab.activeResultSet?.executionTime ?? tab.executionTime)
+                    } else {
+                        dataGridView(tab: tab)
+                    }
                 }
             }
 
@@ -388,6 +395,24 @@ struct MainEditorContentView: View {
         )
     }
 
+    private func emptyResultView(executionTime: TimeInterval?) -> some View {
+        VStack(spacing: 12) {
+            Spacer()
+            Image(systemName: "tray")
+                .font(.system(size: 36))
+                .foregroundStyle(.secondary)
+            Text("No rows returned")
+                .font(.system(size: ThemeEngine.shared.activeTheme.typography.body, weight: .medium))
+            if let time = executionTime {
+                Text(String(format: "%.3fs", time))
+                    .font(.system(size: ThemeEngine.shared.activeTheme.typography.small))
+                    .foregroundStyle(.secondary)
+            }
+            Spacer()
+        }
+        .frame(maxWidth: .infinity, maxHeight: .infinity)
+    }
+
     @ViewBuilder
     private func dataGridView(tab: QueryTab) -> some View {
         DataGridView(

TablePro/Views/Results/DataGridView.swift

@@ -121,10 +121,13 @@ struct DataGridView: NSViewRepresentable {
         for (index, columnName) in rowProvider.columns.enumerated() {
             let column = NSTableColumn(identifier: NSUserInterfaceItemIdentifier("col_\(index)"))
             column.title = columnName
+            if index < rowProvider.columnTypes.count {
+                let typeName = rowProvider.columnTypes[index].rawType ?? rowProvider.columnTypes[index].displayName
+                column.headerToolTip = "\(columnName) (\(typeName))"
+            }
             column.headerCell.setAccessibilityLabel(
                 String(localized: "Column: \(columnName)")
             )
-            // Use optimal width calculation based on both header and cell content
             column.width = context.coordinator.cellFactory.calculateOptimalColumnWidth(
                 for: columnName,
                 columnIndex: index,
@@ -373,6 +376,11 @@ struct DataGridView: NSViewRepresentable {
                 for (index, columnName) in rowProvider.columns.enumerated() {
                     let column = NSTableColumn(identifier: NSUserInterfaceItemIdentifier("col_\(index)"))
                     column.title = columnName
+                    if index < rowProvider.columnTypes.count {
+                        let typeName = rowProvider.columnTypes[index].rawType
+                            ?? rowProvider.columnTypes[index].displayName
+                        column.headerToolTip = "\(columnName) (\(typeName))"
+                    }
                     column.headerCell.setAccessibilityLabel(
                         String(localized: "Column: \(columnName)")
                     )
@@ -394,6 +402,11 @@ struct DataGridView: NSViewRepresentable {
                           colIndex < rowProvider.columns.count else { continue }
                     let columnName = rowProvider.columns[colIndex]
                     column.title = columnName
+                    if colIndex < rowProvider.columnTypes.count {
+                        let typeName = rowProvider.columnTypes[colIndex].rawType
+                            ?? rowProvider.columnTypes[colIndex].displayName
+                        column.headerToolTip = "\(columnName) (\(typeName))"
+                    }
                     column.width = coordinator.cellFactory.calculateOptimalColumnWidth(
                         for: columnName,
                         columnIndex: colIndex,

TablePro/Views/Results/InlineErrorBanner.swift

@@ -5,6 +5,7 @@
 //  Dismissable red error banner for query errors, displayed inline above results.
 //
 
+import AppKit
 import SwiftUI
 
 struct InlineErrorBanner: View {
@@ -20,6 +21,15 @@ struct InlineErrorBanner: View {
                 .lineLimit(3)
                 .textSelection(.enabled)
             Spacer()
+            Button {
+                NSPasteboard.general.clearContents()
+                NSPasteboard.general.setString(message, forType: .string)
+            } label: {
+                Image(systemName: "doc.on.doc")
+                    .foregroundStyle(.secondary)
+            }
+            .buttonStyle(.plain)
+            .help(String(localized: "Copy error message"))
             if let onDismiss {
                 Button { onDismiss() } label: {
                     Image(systemName: "xmark")