Extract a presentational Topbar driven by plain props, so SessionView
is the container (reads Yjs/awareness) and the topbar can render in the
/dev/ui gallery without a live session.
- New useParticipants(yjs) hook: awareness -> sorted Participant[] +
renameLocal. Replaces ParticipantList's inline logic.
- New presentational ParticipantAvatars (Avatar + Host Badge + inline
rename) and Topbar (token-styled shell; undo/redo via IconButton;
connection status with a live dot). ProfileSelector/Export/Save are
passed in as slots (their own restyle is separate).
- SessionView composes <Topbar> from real data; delete ParticipantList.
- /dev/ui gains a "Topbar - configurations" section (solo, multiplayer
+ computing, guest/connecting). Surfaced a narrow-width overflow, now
fixed by making the participant strip the shrink/clip element.
Connection status text ("Connected"/"Verbunden") and behavior are
unchanged, so existing planner E2E selectors still match.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
