Send SIGINT to terminals on workspace close, UI polish

- Send SIGINT to all terminal process groups when a workspace is closed
  so child processes (servers, Claude) release ports and clean up.
- PR badge in workspace list: "PR #123 (Merged)" without dot.
- Delete menu says "Delete Workspace", modal says "Deleting Workspace?"
- Black text on status-colored tabs for readability.
- Configurable diff command in Settings.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: neerajsingh0101

Sources/NeetlyApp/PaneViewController.swift

@@ -204,6 +204,15 @@ class PaneViewController: NSViewController {
         tabs.compactMap { $0.viewController as? BrowserTabViewController }
     }
 
+    /// Send SIGINT to all terminal processes in this pane.
+    func interruptAllTerminals() {
+        for tab in tabs {
+            if let terminal = tab.viewController as? TerminalTabViewController {
+                terminal.interruptProcess()
+            }
+        }
+    }
+
     /// Returns info about all tabs in this pane for the tabs.list command.
     func listTabs() -> [TabListEntry] {
         return tabs.enumerated().map { (i, tab) in

Sources/NeetlyApp/SetupView.swift

@@ -619,7 +619,7 @@ struct WorkspaceListScreen: View {
                                         Button(role: .destructive, action: {
                                             workspaceToDelete = entry.name
                                         }) {
-                                            Label("Delete", systemImage: "trash")
+                                            Label("Delete Workspace", systemImage: "trash")
                                         }
                                     } label: {
                                         Image(systemName: "ellipsis")
@@ -698,7 +698,7 @@ struct DeleteWorktreeSheet: View {
 
     var body: some View {
         VStack(alignment: .leading, spacing: 16) {
-            Text("Delete worktree?")
+            Text("Deleting Workspace?")
                 .font(.system(size: 20, weight: .semibold))
 
             VStack(alignment: .leading, spacing: 8) {
@@ -981,11 +981,8 @@ struct PRBadge: View {
     let prInfo: GitHubPRInfo
 
     var body: some View {
-        HStack(spacing: 5) {
-            Circle()
-                .fill(color)
-                .frame(width: 6, height: 6)
-            Text(verbatim: "\(stateLabel) #\(prInfo.number)")
+        HStack(spacing: 0) {
+            Text(verbatim: "PR #\(prInfo.number) (\(stateLabel))")
                 .font(.system(size: 13, weight: .medium))
                 .foregroundColor(color)
         }

Sources/NeetlyApp/TerminalTabViewController.swift

@@ -223,6 +223,14 @@ class TerminalTabViewController: NSViewController, LocalProcessTerminalViewDeleg
         terminalView.send(data: bytes[...])
     }
 
+    /// Send SIGINT to the shell process and its children (equivalent to Ctrl+C).
+    func interruptProcess() {
+        let pid = terminalView.process.shellPid
+        guard pid > 0 else { return }
+        // Send SIGINT to the process group so child processes (servers, etc.) also get it
+        kill(-pid, SIGINT)
+    }
+
     // MARK: - LocalProcessTerminalViewDelegate
 
     func processTerminated(source: TerminalView, exitCode: Int32?) {

Sources/NeetlyApp/WorkspaceWindowController.swift

@@ -100,6 +100,10 @@ class Workspace {
     }
 
     func stop() {
+        // Send SIGINT to all terminal processes so they can clean up (release ports, etc.)
+        for pane in splitTree.paneControllers.values {
+            pane.interruptAllTerminals()
+        }
         fileWatcher?.stop()
         socketServer.stop()
     }
@@ -337,26 +341,26 @@ private class WorkspaceTab: NSView {
         let repoY: CGFloat = contentBase + 20
         let wsY: CGFloat = contentBase + 4
 
+        let hasStatusColor = statusColor != nil
         let repoLabel = NSTextField(labelWithString: repoName)
         repoLabel.font = .systemFont(ofSize: 10)
-        // Catppuccin Mocha: Subtext0 #a6adc8
-        repoLabel.textColor = isActive ? NSColor(red: 0xa6/255, green: 0xad/255, blue: 0xc8/255, alpha: 1) : .secondaryLabelColor
+        repoLabel.textColor = hasStatusColor ? .black.withAlphaComponent(0.6) : isActive ? NSColor(red: 0xa6/255, green: 0xad/255, blue: 0xc8/255, alpha: 1) : .secondaryLabelColor
         repoLabel.lineBreakMode = .byTruncatingTail
         repoLabel.frame = NSRect(x: 8, y: repoY, width: 140, height: 14)
         addSubview(repoLabel)
 
         let wsLabel = NSTextField(labelWithString: workspaceName)
         wsLabel.font = .systemFont(ofSize: 14, weight: isActive ? .semibold : .regular)
         // Catppuccin Mocha: Text #cdd6f4
-        wsLabel.textColor = isActive ? NSColor(red: 0xcd/255, green: 0xd6/255, blue: 0xf4/255, alpha: 1) : .labelColor
+        wsLabel.textColor = hasStatusColor ? .black : isActive ? NSColor(red: 0xcd/255, green: 0xd6/255, blue: 0xf4/255, alpha: 1) : .labelColor
         wsLabel.lineBreakMode = .byTruncatingTail
         wsLabel.frame = NSRect(x: 8, y: wsY, width: 140, height: 17)
         addSubview(wsLabel)
 
         closeBtn.image = NSImage(systemSymbolName: "xmark", accessibilityDescription: "Detach workspace")
         closeBtn.imagePosition = .imageOnly
         closeBtn.isBordered = false
-        closeBtn.contentTintColor = isActive ? NSColor(red: 0xa6/255, green: 0xad/255, blue: 0xc8/255, alpha: 1) : .secondaryLabelColor
+        closeBtn.contentTintColor = hasStatusColor ? .black.withAlphaComponent(0.6) : isActive ? NSColor(red: 0xa6/255, green: 0xad/255, blue: 0xc8/255, alpha: 1) : .secondaryLabelColor
         closeBtn.target = self
         closeBtn.action = #selector(closeClicked)
         closeBtn.imageScaling = .scaleProportionallyDown