feat: 채팅방 이름 변경 로직 추가

src/main/java/space/space_spring/controller/ChatRoomController.java

@@ -82,4 +82,16 @@ public BaseResponse<ChatSuccessResponse> joinChatRoom(
             @RequestBody JoinChatRoomRequest joinChatRoomRequest) {
         return new BaseResponse<>(chatRoomService.joinChatRoom(userId, chatRoomId, joinChatRoomRequest));
     }
+
+    /**
+     * 특정 채팅방의 이름 수정
+     */
+    @PostMapping("/{chatRoomId}/setting")
+    public BaseResponse<ChatSuccessResponse> modifyChatRoomName(
+            @JwtLoginAuth Long userId,
+            @PathVariable Long spaceId,
+            @PathVariable Long chatRoomId,
+            @RequestParam String name) {
+        return new BaseResponse<>(chatRoomService.modifyChatRoomName(userId, chatRoomId, name));
+    }
 }

src/main/java/space/space_spring/entity/ChatRoom.java

@@ -48,6 +48,10 @@ public static ChatRoom of(Space space, CreateChatRoomRequest createChatRoomReque
                 .build();
     }
 
+    public void updateName(String name) {
+        this.name = name;
+    }
+
     //    // 양방향 매핑
 //    @OneToMany(mappedBy = "chatRoom", cascade = CascadeType.ALL)
 //    private List<UserChatRoom> userChatRooms;

src/main/java/space/space_spring/service/ChatRoomService.java

@@ -142,4 +142,17 @@ public ChatSuccessResponse joinChatRoom(Long userId, Long chatRoomId, JoinChatRo
         });
         return ChatSuccessResponse.of(true);
     }
+
+    public ChatSuccessResponse modifyChatRoomName(Long userId, Long chatRoomId, String name) {
+        // TODO 1: 해당 채팅방 find
+        Optional<ChatRoom> chatRoomByChatRoomId = chatRoomDao.findById(chatRoomId);
+
+        chatRoomByChatRoomId.ifPresent(chatRoom -> {
+            // TODO 2: 채팅방 이름 변경
+            chatRoom.updateName(name);
+            chatRoomDao.save(chatRoom);
+        });
+
+        return ChatSuccessResponse.of(true);
+    }
 }