Three next-batch UX-audit fixes:
- Chat delivery: the sending/sent glyph has higher contrast and a tooltip
("Sent to the network — arrives after it confirms", so a check isn't mistaken
for "delivered"); a failed send now carries the real reason (ChatMessage::
fail_reason, set from onChatBroadcastResult via friendlyRpcError, in-memory
only) in the "not sent" hover tooltip.
- Explorer: a block height beyond the tip says so ("Block N is beyond the chain
tip (M)") instead of silently snapping to the top; the empty block list shows
Not connected / Syncing (N behind) / Loading instead of an endless "Loading".
- Settings: the misleading "Reset to Defaults" button (which only reloads the
last-saved values) is relabeled "Discard unsaved changes" with accurate copy.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>