feat(chat): 캐릭터 상세에서 채팅방 생성 후 ChatRoomActivity로 네비게이션 추가

- ChatRoomActivity에 EXTRA_ROOM_ID 및 newIntent 추가
- CharacterDetailActivity에서 chatRoomId 수신 시 화면 이동 처리
- 이벤트 소비 유지로 중복 네비게이션 방지

app/src/main/AndroidManifest.xml

@@ -285,5 +285,7 @@
 
         <!-- Character Detail -->
         <activity android:name=".chat.character.detail.CharacterDetailActivity" />
+
+        <activity android:name=".chat.talk.room.ChatRoomActivity" />
     </application>
 </manifest>

app/src/main/java/kr/co/vividnext/sodalive/chat/character/detail/CharacterDetailActivity.kt

@@ -14,6 +14,7 @@ import kr.co.vividnext.sodalive.base.BaseActivity
 import kr.co.vividnext.sodalive.common.LoadingDialog
 import kr.co.vividnext.sodalive.databinding.ActivityCharacterDetailBinding
 import kr.co.vividnext.sodalive.extensions.dpToPx
+import kr.co.vividnext.sodalive.chat.talk.room.ChatRoomActivity
 import org.koin.androidx.viewmodel.ext.android.viewModel
 
 class CharacterDetailActivity : BaseActivity<ActivityCharacterDetailBinding>(
@@ -104,6 +105,18 @@ class CharacterDetailActivity : BaseActivity<ActivityCharacterDetailBinding>(
         binding.llPersonalityExpand.setOnClickListener {
             togglePersonalityExpand()
         }
+
+        // 대화하기 버튼 클릭: 채팅방 생성 API 호출
+        binding.btnChat.setOnClickListener {
+            val idFromState = viewModel.uiState.value?.detail?.characterId ?: 0L
+            val idFromIntent = intent.getLongExtra(EXTRA_CHARACTER_ID, 0L)
+            val targetId = if (idFromState > 0) idFromState else idFromIntent
+            if (targetId > 0) {
+                viewModel.createChatRoom(targetId)
+            } else {
+                showToast("잘못된 접근 입니다.")
+            }
+        }
     }
 
     private fun bindObservers() {
@@ -122,6 +135,14 @@ class CharacterDetailActivity : BaseActivity<ActivityCharacterDetailBinding>(
                 }
             }
 
+            // 2-1) 채팅방 생성 성공 처리 (이벤트)
+            state.chatRoomId?.let { roomId ->
+                showToast("채팅방이 생성되었습니다. (ID: $roomId)")
+                // 생성된 채팅방으로 이동 처리
+                startActivity(ChatRoomActivity.newIntent(this, roomId))
+                viewModel.consumeChatRoomCreated()
+            }
+
             // 3) 상세 데이터가 있을 경우에만 기존 UI 바인딩 수행
             val detail = state.detail ?: return@observe
 

app/src/main/java/kr/co/vividnext/sodalive/chat/character/detail/CharacterDetailRepository.kt

@@ -1,8 +1,16 @@
 package kr.co.vividnext.sodalive.chat.character.detail
 
 import kr.co.vividnext.sodalive.chat.character.CharacterApi
+import kr.co.vividnext.sodalive.chat.talk.TalkApi
+import kr.co.vividnext.sodalive.chat.talk.room.CreateChatRoomRequest
 
-class CharacterDetailRepository(private val api: CharacterApi) {
+class CharacterDetailRepository(
+    private val characterApi: CharacterApi,
+    private val talkApi: TalkApi
+) {
     fun getCharacterDetail(token: String, characterId: Long) =
-        api.getCharacterDetail(authHeader = token, characterId = characterId)
+        characterApi.getCharacterDetail(authHeader = token, characterId = characterId)
+
+    fun createChatRoom(token: String, request: CreateChatRoomRequest) =
+        talkApi.createChatRoom(authHeader = token, request = request)
 }

app/src/main/java/kr/co/vividnext/sodalive/chat/character/detail/CharacterDetailViewModel.kt

@@ -6,6 +6,7 @@ import com.orhanobut.logger.Logger
 import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
 import io.reactivex.rxjava3.schedulers.Schedulers
 import kr.co.vividnext.sodalive.base.BaseViewModel
+import kr.co.vividnext.sodalive.chat.talk.room.CreateChatRoomRequest
 import kr.co.vividnext.sodalive.common.SharedPreferenceManager
 
 /**
@@ -23,7 +24,8 @@ class CharacterDetailViewModel(
     data class UiState(
         val detail: CharacterDetailResponse? = null,
         val isLoading: Boolean = false,
-        val error: String? = null
+        val error: String? = null,
+        val chatRoomId: Long? = null
     )
 
     private val _uiState = MutableLiveData(UiState())
@@ -44,14 +46,65 @@ class CharacterDetailViewModel(
                         if (success && data != null) {
                             _uiState.value = UiState(detail = data, isLoading = false, error = null)
                         } else {
-                            _uiState.value = UiState(detail = null, isLoading = false, error = response.message ?: "알 수 없는 오류가 발생했습니다. 다시 시도해 주세요.")
+                            _uiState.value = UiState(
+                                detail = null,
+                                isLoading = false,
+                                error = response.message ?: "알 수 없는 오류가 발생했습니다. 다시 시도해 주세요."
+                            )
                         }
                     },
                     { throwable ->
                         Logger.e(throwable, throwable.message ?: "")
-                        _uiState.value = UiState(detail = null, isLoading = false, error = "알 수 없는 오류가 발생했습니다. 다시 시도해 주세요.")
+                        _uiState.value = UiState(
+                            detail = null,
+                            isLoading = false,
+                            error = "알 수 없는 오류가 발생했습니다. 다시 시도해 주세요."
+                        )
                     }
                 )
         )
     }
+
+    fun createChatRoom(characterId: Long) {
+        // 기존 상태 유지하면서 로딩/에러/이벤트만 변경
+        val current = _uiState.value
+        _uiState.value = current?.copy(isLoading = true, error = null, chatRoomId = null)
+
+        val token = "Bearer ${SharedPreferenceManager.token}"
+        val request = CreateChatRoomRequest(characterId)
+
+        compositeDisposable.add(
+            repository.createChatRoom(token = token, request = request)
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(
+                    { response ->
+                        val success = response.success
+                        val data = response.data
+                        if (success && data != null) {
+                            _uiState.value = _uiState.value?.copy(
+                                isLoading = false,
+                                chatRoomId = data.chatRoomId
+                            )
+                        } else {
+                            _uiState.value = _uiState.value?.copy(
+                                isLoading = false,
+                                error = response.message ?: "채팅방 생성에 실패했습니다. 다시 시도해 주세요."
+                            )
+                        }
+                    },
+                    { throwable ->
+                        Logger.e(throwable, throwable.message ?: "")
+                        _uiState.value = _uiState.value?.copy(
+                            isLoading = false,
+                            error = "채팅방 생성 중 오류가 발생했습니다. 다시 시도해 주세요."
+                        )
+                    }
+                )
+        )
+    }
+
+    fun consumeChatRoomCreated() {
+        _uiState.value = _uiState.value?.copy(chatRoomId = null)
+    }
 }

app/src/main/java/kr/co/vividnext/sodalive/chat/talk/TalkApi.kt

@@ -1,13 +1,23 @@
 package kr.co.vividnext.sodalive.chat.talk
 
 import io.reactivex.rxjava3.core.Single
+import kr.co.vividnext.sodalive.chat.talk.room.CreateChatRoomRequest
+import kr.co.vividnext.sodalive.chat.talk.room.CreateChatRoomResponse
 import kr.co.vividnext.sodalive.common.ApiResponse
+import retrofit2.http.Body
 import retrofit2.http.GET
 import retrofit2.http.Header
+import retrofit2.http.POST
 
 interface TalkApi {
     @GET("/api/chat/room/list")
     fun getTalkRooms(
         @Header("Authorization") authHeader: String
     ): Single<ApiResponse<List<TalkRoom>>>
+
+    @POST("/api/chat/room/create")
+    fun createChatRoom(
+        @Header("Authorization") authHeader: String,
+        @Body request: CreateChatRoomRequest
+    ): Single<ApiResponse<CreateChatRoomResponse>>
 }

app/src/main/java/kr/co/vividnext/sodalive/chat/talk/room/ChatRoomActivity.kt

@@ -0,0 +1,26 @@
+package kr.co.vividnext.sodalive.chat.talk.room
+
+import android.content.Context
+import android.content.Intent
+import kr.co.vividnext.sodalive.base.BaseActivity
+import kr.co.vividnext.sodalive.databinding.ActivityChatRoomBinding
+
+class ChatRoomActivity : BaseActivity<ActivityChatRoomBinding>(
+    ActivityChatRoomBinding::inflate
+) {
+    override fun setupView() {
+        // TODO: roomId를 활용한 채팅방 초기화 로직 추가 예정
+        val roomId = intent.getLongExtra(EXTRA_ROOM_ID, 0L)
+        // 필요 시 roomId 유효성 체크 및 UI 바인딩
+    }
+
+    companion object {
+        const val EXTRA_ROOM_ID: String = "extra_room_id"
+
+        fun newIntent(context: Context, roomId: Long): Intent {
+            return Intent(context, ChatRoomActivity::class.java).apply {
+                putExtra(EXTRA_ROOM_ID, roomId)
+            }
+        }
+    }
+}

app/src/main/java/kr/co/vividnext/sodalive/chat/talk/room/CreateChatRoomRequest.kt

@@ -0,0 +1,9 @@
+package kr.co.vividnext.sodalive.chat.talk.room
+
+import androidx.annotation.Keep
+import com.google.gson.annotations.SerializedName
+
+@Keep
+data class CreateChatRoomRequest(
+    @SerializedName("characterId") val characterId: Long
+)

app/src/main/java/kr/co/vividnext/sodalive/chat/talk/room/CreateChatRoomResponse.kt

@@ -0,0 +1,9 @@
+package kr.co.vividnext.sodalive.chat.talk.room
+
+import androidx.annotation.Keep
+import com.google.gson.annotations.SerializedName
+
+@Keep
+data class CreateChatRoomResponse(
+    @SerializedName("chatRoomId") val chatRoomId: Long
+)

app/src/main/java/kr/co/vividnext/sodalive/di/AppDI.kt

@@ -400,7 +400,7 @@ class AppDI(private val context: Context, isDebugMode: Boolean) {
         factory { PointStatusRepository(get()) }
         factory { HomeRepository(get()) }
         factory { CharacterTabRepository(get()) }
-        factory { CharacterDetailRepository(get()) }
+        factory { CharacterDetailRepository(get(), get()) }
         factory { TalkTabRepository(get()) }
     }
 

app/src/main/res/layout/activity_chat_room.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+</androidx.constraintlayout.widget.ConstraintLayout>