Lobby: sheet theme switch in the tab bar, remove extra toolbar

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HJhXuLD2Z6hv3Wqeq9UL9K

frontend/src/Lobbies.jsx

@@ -1,5 +1,5 @@
 import { useCallback, useEffect, useRef, useState } from 'react'
-import PaperSheet from './PaperSheet.jsx'
+import PaperSheet, { ThemeSwitch } from './PaperSheet.jsx'
 
 const J = { 'Content-Type': 'application/json' }
 const send = (url, method, body) => fetch(url, { method, headers: J, body: body === undefined ? undefined : JSON.stringify(body) })
@@ -323,14 +323,7 @@ function CharTab({ cid, owner, rules, onOpen, name }) {
   return (
     <div>
       {err && <p className="warn">{err}</p>}
-      {data && (
-        <PaperSheet data={data} baseRules={rules} tools={
-          <>
-            <span className="muted small">{owner ? `Played by ${owner}` : 'Your character'} · read-only, hover or tap a value for details</span>
-            <button className="ghost" onClick={onOpen}>{owner ? 'Open in Character tab' : 'Edit in Character tab'}</button>
-          </>
-        } />
-      )}
+      {data && <PaperSheet data={data} baseRules={rules} bare />}
     </div>
   )
 }
@@ -400,6 +393,7 @@ function LobbyView({ id, rules, user, onOpen }) {
               <button key={m.username} role="tab" aria-selected={active === `sheet:${m.username}`} className={active === `sheet:${m.username}` ? 'on' : ''}
                 onClick={() => setTab(`sheet:${m.username}`)} title={m.username}>{m.me && !lobby.is_dm ? 'My character' : m.character.name}</button>
             ))}
+            {active.startsWith('sheet:') && <span className="tabright"><ThemeSwitch /></span>}
           </div>
 
           {active.startsWith('sheet:') && (() => {