Tier A + B chat-tab visual pass:
- Widen the list<->thread gutter (1px -> 10px) for breathing room.
- Redesign the thread header: avatar + name on the left with a
right-aligned frameless icon toolbar (add-contact/export/mute/hide,
each with a tooltip); the name is clipped to the toolbar's left edge
so a long contact label can't overrun the icons.
- Replace the "Copy Full Address" button with a click-to-copy shortened
address (copies the full z-addr), preceded by a key-verify lock whose
tooltip shows a comparable identity-key fingerprint.
- Show a "Waiting for reply" chip in the header when the peer's identity
key isn't known yet.
- Emoji picker: frameless grid with tight cells (glyphs fill the cell)
and leftover width spread into the column gaps so it stays edge-to-edge.
- Larger 30px composer emoji toggle that lights up while the picker is
open; footer height + byte-counter centering adjusted to match.
New i18n keys (chat_copy_address_tip / chat_verify_key / chat_awaiting_key)
added additively to all 8 languages; CJK subset font rebuilt for the new
zh glyph.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>