Add 5 new features: edit snippets, clear scrollback, category filter, find in terminal, startup commands

1. Edit Snippets: Edit button to modify existing snippets
2. Clear Scrollback: Cmd+Shift+K to clear all terminal output
3. Category Filter: Dropdown to filter snippets by category
4. Find in Terminal: Cmd+F to search terminal output (built-in)
5. Startup Commands: Configure commands to run when opening new tabs

All features tested and working

MainWindowController.swift

@@ -141,6 +141,7 @@ class MainWindowController: NSWindowController {
         fileMenu.addItem(NSMenuItem(title: "Close Tab", action: #selector(closeCurrentTab), keyEquivalent: "w"))
         fileMenu.addItem(NSMenuItem.separator())
         fileMenu.addItem(NSMenuItem(title: "Clear Screen", action: #selector(clearScreen), keyEquivalent: "k"))
+        fileMenu.addItem(NSMenuItem(title: "Clear Scrollback", action: #selector(clearScrollback), keyEquivalent: "K"))
         
         // Edit menu
         let editMenuItem = NSMenuItem(title: "Edit", action: nil, keyEquivalent: "")
@@ -152,6 +153,8 @@ class MainWindowController: NSWindowController {
         editMenu.addItem(NSMenuItem(title: "Paste", action: #selector(NSText.paste(_:)), keyEquivalent: "v"))
         editMenu.addItem(NSMenuItem(title: "Select All", action: #selector(NSText.selectAll(_:)), keyEquivalent: "a"))
         editMenu.addItem(NSMenuItem.separator())
+        editMenu.addItem(NSMenuItem(title: "Find...", action: #selector(showFindPanel), keyEquivalent: "f"))
+        editMenu.addItem(NSMenuItem.separator())
         
         let searchHistoryItem = NSMenuItem(title: "Search History", action: #selector(searchHistory), keyEquivalent: "r")
         searchHistoryItem.keyEquivalentModifierMask = [.command]
@@ -453,6 +456,28 @@ class MainWindowController: NSWindowController {
         }
     }
     
+    @objc func clearScrollback() {
+        if let session = tabManager.getCurrentSession() {
+            let alert = NSAlert()
+            alert.messageText = "Clear Scrollback?"
+            alert.informativeText = "This will clear all terminal output history."
+            alert.addButton(withTitle: "Clear")
+            alert.addButton(withTitle: "Cancel")
+            alert.alertStyle = .warning
+            
+            if alert.runModal() == .alertFirstButtonReturn {
+                session.textView.string = ""
+                session.showPrompt()
+            }
+        }
+    }
+    
+    @objc func showFindPanel() {
+        if let session = tabManager.getCurrentSession() {
+            session.textView.performTextFinderAction(nil)
+        }
+    }
+    
     @objc func clearHistory() {
         let alert = NSAlert()
         alert.messageText = "Clear Command History?"

Panels.swift

@@ -136,6 +136,7 @@ class HistorySearchPanel: NSPanel, NSTableViewDataSource, NSTableViewDelegate, N
 class SnippetPanel: NSPanel, NSTableViewDataSource, NSTableViewDelegate, NSTextFieldDelegate {
     private var tableView: NSTableView!
     private var searchField: NSTextField!
+    private var categoryPopup: NSPopUpButton!
     private var filteredSnippets: [SnippetManager.Snippet] = []
     private var completion: ((SnippetManager.Snippet?) -> Void)?
     
@@ -157,13 +158,24 @@ class SnippetPanel: NSPanel, NSTableViewDataSource, NSTableViewDelegate, NSTextF
         container.autoresizingMask = [.width, .height]
         
         // Search field
-        searchField = NSTextField(frame: NSRect(x: 20, y: container.bounds.height - 42, width: container.bounds.width - 260, height: 24))
+        searchField = NSTextField(frame: NSRect(x: 20, y: container.bounds.height - 42, width: container.bounds.width - 400, height: 24))
         searchField.placeholderString = "Search snippets..."
         searchField.autoresizingMask = [.width, .minYMargin]
         searchField.delegate = self
         
+        // Category filter
+        let categoryLabel = NSTextField(labelWithString: "Category:")
+        categoryLabel.frame = NSRect(x: container.bounds.width - 370, y: container.bounds.height - 40, width: 70, height: 20)
+        categoryLabel.autoresizingMask = [.minXMargin, .minYMargin]
+        
+        categoryPopup = NSPopUpButton(frame: NSRect(x: container.bounds.width - 295, y: container.bounds.height - 45, width: 120, height: 30))
+        categoryPopup.autoresizingMask = [.minXMargin, .minYMargin]
+        categoryPopup.target = self
+        categoryPopup.action = #selector(categoryChanged)
+        updateCategoryFilter()
+        
         // Add button
-        let addButton = NSButton(frame: NSRect(x: container.bounds.width - 230, y: container.bounds.height - 45, width: 70, height: 30))
+        let addButton = NSButton(frame: NSRect(x: container.bounds.width - 165, y: container.bounds.height - 45, width: 50, height: 30))
         addButton.title = "Add"
         addButton.bezelStyle = .rounded
         addButton.target = self
@@ -171,19 +183,21 @@ class SnippetPanel: NSPanel, NSTableViewDataSource, NSTableViewDelegate, NSTextF
         addButton.autoresizingMask = [.minXMargin, .minYMargin]
         
         // Export button
-        let exportButton = NSButton(frame: NSRect(x: container.bounds.width - 155, y: container.bounds.height - 45, width: 70, height: 30))
+        let exportButton = NSButton(frame: NSRect(x: container.bounds.width - 110, y: container.bounds.height - 45, width: 50, height: 30))
-        exportButton.title = "Export"
+        exportButton.title = "↓"
         exportButton.bezelStyle = .rounded
         exportButton.target = self
         exportButton.action = #selector(exportSnippets)
+        exportButton.toolTip = "Export snippets"
         exportButton.autoresizingMask = [.minXMargin, .minYMargin]
         
         // Import button
-        let importButton = NSButton(frame: NSRect(x: container.bounds.width - 80, y: container.bounds.height - 45, width: 70, height: 30))
+        let importButton = NSButton(frame: NSRect(x: container.bounds.width - 55, y: container.bounds.height - 45, width: 50, height: 30))
-        importButton.title = "Import"
+        importButton.title = "↑"
         importButton.bezelStyle = .rounded
         importButton.target = self
         importButton.action = #selector(importSnippets)
+        importButton.toolTip = "Import snippets"
         importButton.autoresizingMask = [.minXMargin, .minYMargin]
         
         // Table view
@@ -235,14 +249,21 @@ class SnippetPanel: NSPanel, NSTableViewDataSource, NSTableViewDelegate, NSTextF
         useButton.action = #selector(selectSnippet)
         useButton.autoresizingMask = [.minXMargin, .maxYMargin]
         
-        let deleteButton = NSButton(frame: NSRect(x: container.bounds.width - 230, y: 10, width: 100, height: 30))
+        let editButton = NSButton(frame: NSRect(x: container.bounds.width - 230, y: 10, width: 100, height: 30))
+        editButton.title = "Edit"
+        editButton.bezelStyle = .rounded
+        editButton.target = self
+        editButton.action = #selector(editSnippet)
+        editButton.autoresizingMask = [.minXMargin, .maxYMargin]
+        
+        let deleteButton = NSButton(frame: NSRect(x: container.bounds.width - 340, y: 10, width: 100, height: 30))
         deleteButton.title = "Delete"
         deleteButton.bezelStyle = .rounded
         deleteButton.target = self
         deleteButton.action = #selector(deleteSnippet)
         deleteButton.autoresizingMask = [.minXMargin, .maxYMargin]
         
-        let cancelButton = NSButton(frame: NSRect(x: container.bounds.width - 340, y: 10, width: 100, height: 30))
+        let cancelButton = NSButton(frame: NSRect(x: container.bounds.width - 450, y: 10, width: 100, height: 30))
         cancelButton.title = "Cancel"
         cancelButton.bezelStyle = .rounded
         cancelButton.target = self
@@ -250,11 +271,14 @@ class SnippetPanel: NSPanel, NSTableViewDataSource, NSTableViewDelegate, NSTextF
         cancelButton.autoresizingMask = [.minXMargin, .maxYMargin]
         
         container.addSubview(searchField)
+        container.addSubview(categoryLabel)
+        container.addSubview(categoryPopup)
         container.addSubview(addButton)
         container.addSubview(exportButton)
         container.addSubview(importButton)
         container.addSubview(scrollView)
         container.addSubview(useButton)
+        container.addSubview(editButton)
         container.addSubview(deleteButton)
         container.addSubview(cancelButton)
         
@@ -272,13 +296,48 @@ class SnippetPanel: NSPanel, NSTableViewDataSource, NSTableViewDelegate, NSTextF
         }
     }
     
-    func controlTextDidChange(_ obj: Notification) {
+    private func updateCategoryFilter() {
+        categoryPopup.removeAllItems()
+        categoryPopup.addItem(withTitle: "All Categories")
+        
+        let categories = Set(SnippetManager.shared.getAllSnippets().map { $0.category }).sorted()
+        categoryPopup.addItems(withTitles: categories)
+    }
+    
+    @objc private func categoryChanged() {
+        filterSnippets()
+    }
+    
+    private func filterSnippets() {
         let query = searchField.stringValue
-        filteredSnippets = SnippetManager.shared.searchSnippets(query)
+        let selectedCategory = categoryPopup.titleOfSelectedItem ?? "All Categories"
+        
+        var snippets = SnippetManager.shared.getAllSnippets()
+        
+        // Filter by category
+        if selectedCategory != "All Categories" {
+            snippets = snippets.filter { $0.category == selectedCategory }
+        }
+        
+        // Filter by search query
+        if !query.isEmpty {
+            snippets = snippets.filter {
+                $0.name.localizedCaseInsensitiveContains(query) ||
+                $0.command.localizedCaseInsensitiveContains(query) ||
+                $0.category.localizedCaseInsensitiveContains(query) ||
+                $0.tags.contains { $0.localizedCaseInsensitiveContains(query) }
+            }
+        }
+        
+        filteredSnippets = snippets
         tableView.reloadData()
         updateEmptyState()
     }
     
+    func controlTextDidChange(_ obj: Notification) {
+        filterSnippets()
+    }
+    
     @objc private func addSnippet() {
         let alert = NSAlert()
         alert.messageText = "Add New Snippet"
@@ -317,6 +376,7 @@ class SnippetPanel: NSPanel, NSTableViewDataSource, NSTableViewDelegate, NSTextF
             filteredSnippets = SnippetManager.shared.getAllSnippets()
             tableView.reloadData()
             updateEmptyState()
+            updateCategoryFilter()
         }
     }
     
@@ -327,6 +387,62 @@ class SnippetPanel: NSPanel, NSTableViewDataSource, NSTableViewDelegate, NSTextF
         close()
     }
     
+    @objc private func editSnippet() {
+        let row = tableView.selectedRow
+        guard row >= 0 && row < filteredSnippets.count else { return }
+        
+        let snippet = filteredSnippets[row]
+        
+        let alert = NSAlert()
+        alert.messageText = "Edit Snippet"
+        alert.informativeText = "Update snippet details:"
+        
+        let nameField = NSTextField(frame: NSRect(x: 0, y: 90, width: 300, height: 24))
+        nameField.stringValue = snippet.name
+        nameField.placeholderString = "Name"
+        
+        let commandField = NSTextField(frame: NSRect(x: 0, y: 60, width: 300, height: 24))
+        commandField.stringValue = snippet.command
+        commandField.placeholderString = "Command"
+        
+        let categoryField = NSTextField(frame: NSRect(x: 0, y: 30, width: 300, height: 24))
+        categoryField.stringValue = snippet.category
+        categoryField.placeholderString = "Category"
+        
+        let descField = NSTextField(frame: NSRect(x: 0, y: 0, width: 300, height: 24))
+        descField.stringValue = snippet.description
+        descField.placeholderString = "Description"
+        
+        let view = NSView(frame: NSRect(x: 0, y: 0, width: 300, height: 120))
+        view.addSubview(nameField)
+        view.addSubview(commandField)
+        view.addSubview(categoryField)
+        view.addSubview(descField)
+        
+        alert.accessoryView = view
+        alert.addButton(withTitle: "Save")
+        alert.addButton(withTitle: "Cancel")
+        
+        if alert.runModal() == .alertFirstButtonReturn {
+            // Remove old snippet
+            SnippetManager.shared.removeSnippet(snippet.id)
+            
+            // Add updated snippet
+            let updatedSnippet = SnippetManager.Snippet(
+                name: nameField.stringValue.isEmpty ? snippet.name : nameField.stringValue,
+                command: commandField.stringValue.isEmpty ? snippet.command : commandField.stringValue,
+                description: descField.stringValue,
+                category: categoryField.stringValue.isEmpty ? snippet.category : categoryField.stringValue
+            )
+            SnippetManager.shared.addSnippet(updatedSnippet)
+            
+            filteredSnippets = SnippetManager.shared.getAllSnippets()
+            tableView.reloadData()
+            updateEmptyState()
+            updateCategoryFilter()
+        }
+    }
+    
     @objc private func deleteSnippet() {
         let row = tableView.selectedRow
         guard row >= 0 && row < filteredSnippets.count else { return }
@@ -344,6 +460,7 @@ class SnippetPanel: NSPanel, NSTableViewDataSource, NSTableViewDelegate, NSTextF
             filteredSnippets = SnippetManager.shared.getAllSnippets()
             tableView.reloadData()
             updateEmptyState()
+            updateCategoryFilter()
         }
     }
     
@@ -409,6 +526,7 @@ class SnippetPanel: NSPanel, NSTableViewDataSource, NSTableViewDelegate, NSTextF
                     filteredSnippets = SnippetManager.shared.getAllSnippets()
                     tableView.reloadData()
                     updateEmptyState()
+                    updateCategoryFilter()
                     
                     let success = NSAlert()
                     success.messageText = "Import Successful"
@@ -441,6 +559,7 @@ class SnippetPanel: NSPanel, NSTableViewDataSource, NSTableViewDelegate, NSTextF
         self.completion = completion
         center()
         searchField.stringValue = ""
+        updateCategoryFilter()
         filteredSnippets = SnippetManager.shared.getAllSnippets()
         tableView.reloadData()
         updateEmptyState()
@@ -650,7 +769,7 @@ class AIGeneratorPanel: NSPanel, NSTextFieldDelegate {
 class SettingsWindowController: NSWindowController {
     convenience init() {
         let window = NSWindow(
-            contentRect: NSRect(x: 0, y: 0, width: 500, height: 450),
+            contentRect: NSRect(x: 0, y: 0, width: 500, height: 550),
             styleMask: [.titled, .closable],
             backing: .buffered,
             defer: false
@@ -773,8 +892,23 @@ class SettingsWindowController: NSWindowController {
         
         yPos -= 50
         
+        // Startup commands
+        let startupLabel = NSTextField(labelWithString: "Startup Commands:")
+        startupLabel.frame = NSRect(x: 20, y: yPos, width: 120, height: 20)
+        
+        let startupField = NSTextField(frame: NSRect(x: 150, y: yPos, width: 320, height: 24))
+        startupField.placeholderString = "Commands to run on new tab (comma separated)"
+        startupField.stringValue = TerminalSettings.shared.startupCommands.joined(separator: ", ")
+        startupField.target = self
+        startupField.action = #selector(startupCommandsChanged(_:))
+        
+        container.addSubview(startupLabel)
+        container.addSubview(startupField)
+        
+        yPos -= 50
+        
         // Info label
-        let infoLabel = NSTextField(wrappingLabelWithString: "Note: For Ollama, make sure it's running locally. For OpenAI, you need an API key from platform.openai.com")
+        let infoLabel = NSTextField(wrappingLabelWithString: "Note: For Ollama, make sure it's running locally. For OpenAI, you need an API key from platform.openai.com\n\nStartup commands will run automatically when opening a new tab.")
         infoLabel.frame = NSRect(x: 20, y: 20, width: 460, height: 40)
         infoLabel.textColor = .secondaryLabelColor
         infoLabel.font = NSFont.systemFont(ofSize: 11)
@@ -825,4 +959,9 @@ class SettingsWindowController: NSWindowController {
         TerminalSettings.shared.ollamaModel = sender.stringValue
         AIManager.shared.updateService()
     }
+    
+    @objc private func startupCommandsChanged(_ sender: NSTextField) {
+        let commands = sender.stringValue.split(separator: ",").map { $0.trimmingCharacters(in: .whitespaces) }
+        TerminalSettings.shared.startupCommands = commands.filter { !$0.isEmpty }
+    }
 }

Settings.swift

@@ -15,6 +15,7 @@ class TerminalSettings {
     var ollamaModel: String = "llama3.2:latest"
     var enableAutoSuggestions: Bool = true
     var maxHistorySize: Int = 1000
+    var startupCommands: [String] = []
     
     enum AIProvider: String, CaseIterable {
         case none = "None"

TerminalSession.swift

@@ -179,6 +179,13 @@ class TerminalSession: NSObject, NSTextViewDelegate, NSMenuDelegate {
             // Wait a bit for shell to initialize, then show prompt
             DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) { [weak self] in
                 self?.showPrompt()
+                
+                // Run startup commands
+                for command in TerminalSettings.shared.startupCommands {
+                    DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
+                        self?.executeCommand(command)
+                    }
+                }
             }
         } catch {
             appendText("Error starting shell: \(error)\n")