fix: 타임테이블 방 표기 정정 (Room2 제거, 6층 Main + 7층 Room1)

실제 사용 가능한 방은 6층 Main과 7층 Room1 두 곳. 기존 room1 배정 발표들을
6층 Main으로, 기존 room2 배정 발표들을 7층 Room1로 재배치.

- TimetableList: 3열 → 2열 구조 (6층 Main / 7층 Room1)
- findSessionByCode room 레이블 갱신 → 상세 페이지 장소 표기도 자동 반영

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: ppiyakk2

src/components/TimetableList.jsx

@@ -63,7 +63,6 @@ function TimetableList({ sessions }) {
             <th className="tt-th tt-th-time"></th>
             <th className="tt-th">6층 Main</th>
             <th className="tt-th">7층 Room1</th>
-            <th className="tt-th">7층 Room2</th>
           </tr>
         </thead>
         <tbody>
@@ -74,7 +73,7 @@ function TimetableList({ sessions }) {
                   <td className="tt-td tt-time">
                     <TimeRange start={row.time} end={row.endTime} />
                   </td>
-                  <td className="tt-td tt-cell-full" colSpan={3}>
+                  <td className="tt-td tt-cell-full" colSpan={2}>
                     <SessionCell title={title(row)} speaker={row.speaker} code={row.code} />
                   </td>
                 </tr>
@@ -87,7 +86,6 @@ function TimetableList({ sessions }) {
                   <td className="tt-td tt-time">
                     <TimeRange start={row.time} end={row.endTime} />
                   </td>
-                  <td className="tt-td tt-cell-empty"></td>
                   <td className="tt-td tt-cell-session">
                     <SessionCell title={roomTitle(row.room1)} speaker={row.room1.speaker} code={row.room1.code} />
                   </td>
@@ -103,7 +101,7 @@ function TimetableList({ sessions }) {
                 <td className="tt-td tt-time tt-time-break">
                   <TimeRange start={row.time} end={row.endTime} />
                 </td>
-                <td className="tt-td tt-cell-break" colSpan={3}>
+                <td className="tt-td tt-cell-break" colSpan={2}>
                   {title(row) && <span className="tt-break-label">{title(row)}</span>}
                 </td>
               </tr>

src/data/schedule.js

@@ -200,8 +200,8 @@ export function findSessionByCode(code) {
     }
     if (row.type === 'parallel') {
       for (const [key, label, labelEn] of [
-        ['room1', '7층 Room1', '7F Room1'],
-        ['room2', '7층 Room2', '7F Room2'],
+        ['room1', '6층 Main', '6F Main'],
+        ['room2', '7층 Room1', '7F Room1'],
       ]) {
         const r = row[key];
         if (r && r.code === code) {