fix(messaging-ui): unreadable code chip on own messages + raw markers in previews

Two bugs from the formatting work, both visible in the CRM messenger:

1. Inline code / code blocks were invisible in your OWN bubbles. `.miu-code` sets
   background: --miu-panel-2 (#1d1d26) while the is-mine override set only the
   colour to --miu-accent-text (#1a1206) — near-black on near-black, ~1.03:1
   contrast. The chip now tints the accent bubble (rgba(0,0,0,.16)) instead of
   using the panel colour, so it reads against any accent.

2. The conversation list showed the raw last message, so a strikethrough message
   previewed as "~crazy~". Adds stripMarkup() — markers off, code unwrapped,
   nesting handled, honouring the same word-boundary rule so snake_case_name and
   "5 * 3" survive — and uses it for the preview line.

Bumped to 0.1.10. SDK suite: 17 files / 98 tests green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

packages/iios-messaging-ui/src/components/conversation-list.tsx

@@ -1,4 +1,5 @@
 import type { Conversation } from '../types';
+import { stripMarkup } from '../rich-text';
 
 /** Initials for the avatar chip — first letters of the first two words. */
 function initials(title: string): string {
@@ -37,7 +38,7 @@ export function ConversationList({
             </span>
             <span className="miu-convrow-main">
               <span className="miu-convrow-title">{c.title}</span>
-              {c.lastMessage ? <span className="miu-convrow-preview">{c.lastMessage}</span> : null}
+              {c.lastMessage ? <span className="miu-convrow-preview">{stripMarkup(c.lastMessage)}</span> : null}
             </span>
             {c.unread > 0 ? (
               <span className="miu-badge" aria-label={`${c.unread} unread`}>