fix: no right-click Cut/Copy/Paste in release builds

Wails disables the WebView context menu in production, so an operator could not
paste a cluster address, an API key or a callsign anywhere in the app. Ctrl+V
did work — nothing intercepts it — but the menu is where people look, and a key
copied off a web page is exactly what you paste rather than retype.

EnableDefaultContextMenu turns it back on.

main.go

@@ -118,6 +118,12 @@ func main() {
 		// buttons. Windows still draws the resize borders and honours Aero Snap,
 		// which is why the frame is dropped rather than the whole chrome.
 		Frameless: true,
+		// Right-click → Cut / Copy / Paste. Wails disables the WebView's context
+		// menu in production builds, so an operator could not paste a cluster
+		// address, an API key or a callsign anywhere in the app — Ctrl+V worked,
+		// but nothing said so, and pasting is exactly what you do with a key
+		// copied off a web page.
+		EnableDefaultContextMenu: true,
 		// Start hidden and reveal only once the saved position has been applied and
 		// the DOM has painted (OnDomReady → domReady) — so the window appears
 		// already at its final size and position, with no post-launch jump.