feat: anchor companion menu above selected character

index.html

@@ -87,13 +87,13 @@
           </fieldset>
           </div>
       </div>
-      <div class="movement-controls" aria-label="위치와 방향 조절">
-        <div id="companion-selection" hidden>
+      <div id="companion-selection" role="group" aria-label="선택한 캐릭터" hidden>
           <span id="companion-name"></span>
           <button type="button" id="stand-beside">옆에 서기</button>
           <button type="button" id="companion-close" aria-label="선택 닫기">×</button>
           <p id="companion-status" role="status"></p>
-        </div>
+      </div>
+      <div class="movement-controls" aria-label="위치와 방향 조절">
         <p id="direction-hint" role="status" hidden>좌우로 드래그하면 내 캐릭터만 돌아갑니다</p>
         <button type="button" id="direction-toggle" aria-pressed="false" aria-describedby="direction-hint" disabled>방향 맞추기</button>
       </div>