A native Windows MessageBox attached to a parent window disables that
window (WS_DISABLED) for its lifetime and re-enables it on dismissal.
When the parent is the main window — whose WindowClosing hook hides
instead of closes — the enable/hide sequence races and leaves the window
unable to process its close (X) button afterwards, so e.g. a rejected
login error dialog left the main window stuck open.
Route all native dialogs through src/lib/dialogs.ts, which forces
Detached: true on Windows (NULL owner, no window ever disabled) and is a
no-op on macOS/Linux (keeps the attached sheet-style presentation).
The daemon returns gRPC errors whose message is a wrapped mgm + JWT
stack (e.g. "invalid jwt token, err: token could not be parsed: ...").
Showing that in a native dialog is unreadable. Connection now maps the
substrings it recognises to a ClientError{code, short, long} so the UI
can render a localised summary plus a Details: block carrying the raw
daemon text. formatErrorMessage on the TS side reads the structured
payload from Wails' Error.cause (or the JSON-stringified Error.message)
and falls back to plain Error.message for callers not yet migrated.
Also bumps Wails to v3.0.0-alpha.95.
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.
