Tighten verbose comments in Wails UI Go code

Shorten over-long godoc/inline comments across the client/ui tray and
services code: drop narrative restatement, legacy-Fyne tangents, and text
already evident from signatures and names. Keep only the non-obvious why
(concurrency/lock ordering, platform quirks, ordering constraints, the
profile-switch state table). No code changes.

client/ui/tray_status_enabled_linux.go

@@ -2,13 +2,7 @@
 
 package main
 
-// statusRowEnabled reports whether the informational status row at the
-// top of the tray menu should stay enabled. True on Linux: a disabled
-// row is painted greyed-out, which makes the connection-status indicator
-// at the top of the menu look washed-out. Keeping it enabled lets the
-// row (and its coloured status dot) render at full opacity. The row has
-// no OnClick handler, so clicking it is still a no-op — enabling only
-// affects how it is drawn, not its behaviour. macOS disables the row
-// (tray_status_enabled_other.go); Windows enables it for a different
-// reason (tray_status_enabled_windows.go).
+// statusRowEnabled keeps the top status row enabled on Linux: a disabled row
+// paints greyed-out, washing out the status dot. The row has no OnClick, so
+// enabling only affects drawing.
 func statusRowEnabled() bool { return true }