[client] UI refactor (#6069)

Refactor UI

---------

Co-authored-by: Eduard Gert <kontakt@eduardgert.de>
Co-authored-by: braginini <bangvalo@gmail.com>
Co-authored-by: Pascal Fischer <32096965+pascal-fischer@users.noreply.github.com>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: riccardom <riccardomanfrin@gmail.com>

client/ui/tray_click_other.go

@@ -0,0 +1,13 @@
+//go:build !windows && !android && !ios && !freebsd && !js && (!linux || (linux && 386))
+
+package main
+
+func bindTrayClick(*Tray) {
+	// No-op: macOS's native NSStatusItem opens the menu on click itself, and
+	// binding OnClick→anything blocking there froze the tray historically
+	// (see tray_click_windows.go). Windows wires an explicit handler
+	// (tray_click_windows.go); Linux opens the window on left-click
+	// (tray_click_linux.go). The (linux && 386) arm keeps a no-op fallback for
+	// the i386 Linux build, which excludes the cgo XEmbed/SNI files that
+	// tray_click_linux.go's build tag matches.
+}