Left-click on the tray icon now opens the menu on every platform — the
window is reached through a new "Open NetBird" entry. Only the action
that matches the current daemon state is shown: Connect when
disconnected, Disconnect when connected. The main window starts hidden
and is only surfaced via the tray, single-instance launch, or daemon
events.
Follow-up to the rename commit: the previous commit moved the files but
the post-mv string substitutions (Go imports, frontend bindings, CI
config paths) were not re-staged so they slipped through. This commit
applies those edits and removes the fyne dependencies from go.mod/go.sum
now that the legacy fyne UI is gone.
Removes the legacy fyne-based client/ui implementation and renames the
Wails replacement (client/ui-wails) to take its place at client/ui. Go
imports, frontend bindings, CI workflows, goreleaser configs and the
windows .syso icon path are updated to follow the rename.
