From dde81cab65df5e2e85504c2625cc4cc7afc594fb Mon Sep 17 00:00:00 2001
From: lunaticbum <lunaticbum@gmail.com>
Date: Mon, 24 Nov 2025 17:53:00 +0900
Subject: [PATCH] ..

---
 .dart_tool/extension_discovery/README.md      |  31 -
 .dart_tool/extension_discovery/vs_code.json   |   1 -
 apps/app/android/app/build.gradle.kts         |  19 +-
 .../android/app/src/main/AndroidManifest.xml  |  22 +
 .../com/playwith/playwith_app/MainActivity.kt |  40 +-
 apps/app/android/build.gradle.kts             |  10 +-
 apps/app/ios/Podfile.lock                     | 213 ++++++
 apps/app/ios/Runner.xcodeproj/project.pbxproj | 130 ++++
 .../contents.xcworkspacedata                  |   3 +
 apps/app/ios/Runner/Info.plist                |  18 +
 apps/app/lib/intro_screen.dart                |  46 +-
 apps/app/lib/lobby_screen.dart                | 560 ++++++++++++----
 apps/app/lib/main.dart                        |  50 +-
 .../flutter/generated_plugin_registrant.cc    |  12 +
 .../app/linux/flutter/generated_plugins.cmake |   3 +
 .../Flutter/GeneratedPluginRegistrant.swift   |   8 +
 apps/app/pubspec.lock                         | 495 +++++++++++++-
 apps/app/pubspec.yaml                         |  42 +-
 .../flutter/generated_plugin_registrant.cc    |  15 +
 .../windows/flutter/generated_plugins.cmake   |   5 +
 .../core/lib/database/ephemeral_database.dart |  47 ++
 .../lib/database/ephemeral_database.g.dart    | 557 ++++++++++++++++
 packages/core/lib/game/base_game.dart         |  58 +-
 .../core/lib/manager/global_chat_manager.dart |  70 ++
 packages/core/lib/manager/media_manager.dart  | 149 +++++
 packages/core/lib/model/play_packet.dart      |  52 ++
 packages/core/lib/model/user_info.dart        |  17 +-
 .../core/lib/network/network_manager.dart     | 517 ++++++++++-----
 packages/core/lib/playwith_core.dart          |  13 +-
 packages/core/lib/utils/sound_manager.dart    |  65 ++
 .../core/lib/widgets/game_chat_overlay.dart   | 229 +++++++
 packages/core/pubspec.yaml                    |  22 +-
 packages/games/quiz/lib/quiz_game.dart        | 618 ++++++++++++++++++
 packages/games/quiz/pubspec.yaml              |  52 +-
 34 files changed, 3719 insertions(+), 470 deletions(-)
 delete mode 100644 .dart_tool/extension_discovery/README.md
 delete mode 100644 .dart_tool/extension_discovery/vs_code.json
 create mode 100644 apps/app/ios/Podfile.lock
 create mode 100644 packages/core/lib/database/ephemeral_database.dart
 create mode 100644 packages/core/lib/database/ephemeral_database.g.dart
 create mode 100644 packages/core/lib/manager/global_chat_manager.dart
 create mode 100644 packages/core/lib/manager/media_manager.dart
 create mode 100644 packages/core/lib/model/play_packet.dart
 create mode 100644 packages/core/lib/utils/sound_manager.dart
 create mode 100644 packages/core/lib/widgets/game_chat_overlay.dart
 create mode 100644 packages/games/quiz/lib/quiz_game.dart

diff --git a/.dart_tool/extension_discovery/README.md b/.dart_tool/extension_discovery/README.md
deleted file mode 100644
index 9dc6757..0000000
--- a/.dart_tool/extension_discovery/README.md
+++ /dev/null
@@ -1,31 +0,0 @@
-Extension Discovery Cache
-=========================
-
-This folder is used by `package:extension_discovery` to cache lists of
-packages that contains extensions for other packages.
-
-DO NOT USE THIS FOLDER
-----------------------
-
- * Do not read (or rely) the contents of this folder.
- * Do write to this folder.
-
-If you're interested in the lists of extensions stored in this folder use the
-API offered by package `extension_discovery` to get this information.
-
-If this package doesn't work for your use-case, then don't try to read the
-contents of this folder. It may change, and will not remain stable.
-
-Use package `extension_discovery`
----------------------------------
-
-If you want to access information from this folder.
-
-Feel free to delete this folder
--------------------------------
-
-Files in this folder act as a cache, and the cache is discarded if the files
-are older than the modification time of `.dart_tool/package_config.json`.
-
-Hence, it should never be necessary to clear this cache manually, if you find a
-need to do please file a bug.
diff --git a/.dart_tool/extension_discovery/vs_code.json b/.dart_tool/extension_discovery/vs_code.json
deleted file mode 100644
index e25437e..0000000
--- a/.dart_tool/extension_discovery/vs_code.json
+++ /dev/null
@@ -1 +0,0 @@
-{"version":2,"entries":[{"package":"playWith","rootUri":"../","packageUri":"lib/"}]}
\ No newline at end of file
diff --git a/apps/app/android/app/build.gradle.kts b/apps/app/android/app/build.gradle.kts
index d131d20..8005363 100644
--- a/apps/app/android/app/build.gradle.kts
+++ b/apps/app/android/app/build.gradle.kts
@@ -7,16 +7,20 @@ plugins {
 
 android {
     namespace = "com.playwith.playwith_app"
-    compileSdk = flutter.compileSdkVersion
+    compileSdk = 34
     ndkVersion = flutter.ndkVersion
 
+   // [수정할 부분]
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_11
-        targetCompatibility = JavaVersion.VERSION_11
+        // 기존 1.8 -> 17로 변경
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
     }
 
+    // [수정할 부분]
     kotlinOptions {
-        jvmTarget = JavaVersion.VERSION_11.toString()
+        // 기존 '1.8' -> '17'로 변경
+        jvmTarget = "17"
     }
 
     defaultConfig {
@@ -24,8 +28,11 @@ android {
         applicationId = "com.playwith.playwith_app"
         // You can update the following values to match your application needs.
         // For more information, see: https://flutter.dev/to/review-gradle-config.
-        minSdk = flutter.minSdkVersion
-        targetSdk = flutter.targetSdkVersion
+        // [수정] 최소 SDK는 21 이상이면 됨
+        minSdk = flutter.minSdkVersion 
+        // [수정] 타겟 SDK도 34로 올림
+        targetSdk = 34
+        
         versionCode = flutter.versionCode
         versionName = flutter.versionName
     }
diff --git a/apps/app/android/app/src/main/AndroidManifest.xml b/apps/app/android/app/src/main/AndroidManifest.xml
index e0c9d50..d529e8f 100644
--- a/apps/app/android/app/src/main/AndroidManifest.xml
+++ b/apps/app/android/app/src/main/AndroidManifest.xml
@@ -1,4 +1,20 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
+    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
+    <uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE"/>
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
+    
+    <uses-permission android:name="android.permission.NEARBY_WIFI_DEVICES" />
+
+    <uses-permission android:name="android.permission.CAMERA"/>
+
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+    <uses-permission android:name="android.permission.CAMERA"/>
+
     <application
         android:label="playwith_app"
         android:name="${applicationName}"
@@ -30,6 +46,12 @@
         <meta-data
             android:name="flutterEmbedding"
             android:value="2" />
+
+        <meta-data
+            android:name="com.google.android.gms.ads.APPLICATION_ID"
+            android:value="ca-app-pub-9504446465764716~3452126047"
+            />
+
     </application>
     <!-- Required to query activities that can process text, see:
          https://developer.android.com/training/package-visibility and
diff --git a/apps/app/android/app/src/main/kotlin/com/playwith/playwith_app/MainActivity.kt b/apps/app/android/app/src/main/kotlin/com/playwith/playwith_app/MainActivity.kt
index 63a5774..9fc9ebe 100644
--- a/apps/app/android/app/src/main/kotlin/com/playwith/playwith_app/MainActivity.kt
+++ b/apps/app/android/app/src/main/kotlin/com/playwith/playwith_app/MainActivity.kt
@@ -1,5 +1,43 @@
 package com.playwith.playwith_app
 
+import android.content.Context
+import android.net.wifi.WifiManager
+import android.os.Bundle
 import io.flutter.embedding.android.FlutterActivity
 
-class MainActivity : FlutterActivity()
+class MainActivity: FlutterActivity() {
+    // 멀티캐스트 잠금 객체
+    private var multicastLock: WifiManager.MulticastLock? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        acquireMulticastLock()
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        releaseMulticastLock()
+    }
+
+    private fun acquireMulticastLock() {
+        try {
+            val wifiManager = applicationContext.getSystemService(Context.WIFI_SERVICE) as WifiManager
+            // "multicastLock" 태그로 잠금 생성
+            multicastLock = wifiManager.createMulticastLock("multicastLock")
+            multicastLock?.setReferenceCounted(true)
+            multicastLock?.acquire() // 잠금 활성화 (멀티캐스트 수신 허용)
+            println("[Android Native] Multicast Lock Acquired!")
+        } catch (e: Exception) {
+            println("[Android Native] Failed to acquire Multicast Lock: $e")
+        }
+    }
+
+    private fun releaseMulticastLock() {
+        try {
+            multicastLock?.release() // 잠금 해제
+            println("[Android Native] Multicast Lock Released!")
+        } catch (e: Exception) {
+            println("[Android Native] Failed to release Multicast Lock: $e")
+        }
+    }
+}
\ No newline at end of file
diff --git a/apps/app/android/build.gradle.kts b/apps/app/android/build.gradle.kts
index dbee657..787bb73 100644
--- a/apps/app/android/build.gradle.kts
+++ b/apps/app/android/build.gradle.kts
@@ -5,20 +5,20 @@ allprojects {
     }
 }
 
-val newBuildDir: Directory =
-    rootProject.layout.buildDirectory
-        .dir("../../build")
-        .get()
+// [핵심] 빌드 결과물 위치를 Flutter 표준 경로(../../build)로 변경
+// 이 코드가 없으면 Flutter가 APK를 찾지 못해 에러가 납니다.
+val newBuildDir: Directory = rootProject.layout.buildDirectory.dir("../../build").get()
 rootProject.layout.buildDirectory.value(newBuildDir)
 
 subprojects {
     val newSubprojectBuildDir: Directory = newBuildDir.dir(project.name)
     project.layout.buildDirectory.value(newSubprojectBuildDir)
 }
+
 subprojects {
     project.evaluationDependsOn(":app")
 }
 
 tasks.register<Delete>("clean") {
     delete(rootProject.layout.buildDirectory)
-}
+}
\ No newline at end of file
diff --git a/apps/app/ios/Podfile.lock b/apps/app/ios/Podfile.lock
new file mode 100644
index 0000000..354be0e
--- /dev/null
+++ b/apps/app/ios/Podfile.lock
@@ -0,0 +1,213 @@
+PODS:
+  - audioplayers_darwin (0.0.1):
+    - Flutter
+    - FlutterMacOS
+  - bonsoir_darwin (0.0.1):
+    - Flutter
+    - FlutterMacOS
+  - DKImagePickerController/Core (4.3.9):
+    - DKImagePickerController/ImageDataManager
+    - DKImagePickerController/Resource
+  - DKImagePickerController/ImageDataManager (4.3.9)
+  - DKImagePickerController/PhotoGallery (4.3.9):
+    - DKImagePickerController/Core
+    - DKPhotoGallery
+  - DKImagePickerController/Resource (4.3.9)
+  - DKPhotoGallery (0.0.19):
+    - DKPhotoGallery/Core (= 0.0.19)
+    - DKPhotoGallery/Model (= 0.0.19)
+    - DKPhotoGallery/Preview (= 0.0.19)
+    - DKPhotoGallery/Resource (= 0.0.19)
+    - SDWebImage
+    - SwiftyGif
+  - DKPhotoGallery/Core (0.0.19):
+    - DKPhotoGallery/Model
+    - DKPhotoGallery/Preview
+    - SDWebImage
+    - SwiftyGif
+  - DKPhotoGallery/Model (0.0.19):
+    - SDWebImage
+    - SwiftyGif
+  - DKPhotoGallery/Preview (0.0.19):
+    - DKPhotoGallery/Model
+    - DKPhotoGallery/Resource
+    - SDWebImage
+    - SwiftyGif
+  - DKPhotoGallery/Resource (0.0.19):
+    - SDWebImage
+    - SwiftyGif
+  - file_picker (0.0.1):
+    - DKImagePickerController/PhotoGallery
+    - Flutter
+  - Flutter (1.0.0)
+  - GoogleDataTransport (9.4.1):
+    - GoogleUtilities/Environment (~> 7.7)
+    - nanopb (< 2.30911.0, >= 2.30908.0)
+    - PromisesObjC (< 3.0, >= 1.2)
+  - GoogleMLKit/BarcodeScanning (6.0.0):
+    - GoogleMLKit/MLKitCore
+    - MLKitBarcodeScanning (~> 5.0.0)
+  - GoogleMLKit/MLKitCore (6.0.0):
+    - MLKitCommon (~> 11.0.0)
+  - GoogleToolboxForMac/Defines (4.2.1)
+  - GoogleToolboxForMac/Logger (4.2.1):
+    - GoogleToolboxForMac/Defines (= 4.2.1)
+  - "GoogleToolboxForMac/NSData+zlib (4.2.1)":
+    - GoogleToolboxForMac/Defines (= 4.2.1)
+  - GoogleUtilities/Environment (7.13.3):
+    - GoogleUtilities/Privacy
+    - PromisesObjC (< 3.0, >= 1.2)
+  - GoogleUtilities/Logger (7.13.3):
+    - GoogleUtilities/Environment
+    - GoogleUtilities/Privacy
+  - GoogleUtilities/Privacy (7.13.3)
+  - GoogleUtilities/UserDefaults (7.13.3):
+    - GoogleUtilities/Logger
+    - GoogleUtilities/Privacy
+  - GoogleUtilitiesComponents (1.1.0):
+    - GoogleUtilities/Logger
+  - GTMSessionFetcher/Core (3.5.0)
+  - image_picker_ios (0.0.1):
+    - Flutter
+  - MLImage (1.0.0-beta5)
+  - MLKitBarcodeScanning (5.0.0):
+    - MLKitCommon (~> 11.0)
+    - MLKitVision (~> 7.0)
+  - MLKitCommon (11.0.0):
+    - GoogleDataTransport (< 10.0, >= 9.4.1)
+    - GoogleToolboxForMac/Logger (< 5.0, >= 4.2.1)
+    - "GoogleToolboxForMac/NSData+zlib (< 5.0, >= 4.2.1)"
+    - GoogleUtilities/UserDefaults (< 8.0, >= 7.13.0)
+    - GoogleUtilitiesComponents (~> 1.0)
+    - GTMSessionFetcher/Core (< 4.0, >= 3.3.2)
+  - MLKitVision (7.0.0):
+    - GoogleToolboxForMac/Logger (< 5.0, >= 4.2.1)
+    - "GoogleToolboxForMac/NSData+zlib (< 5.0, >= 4.2.1)"
+    - GTMSessionFetcher/Core (< 4.0, >= 3.3.2)
+    - MLImage (= 1.0.0-beta5)
+    - MLKitCommon (~> 11.0)
+  - mobile_scanner (5.2.3):
+    - Flutter
+    - GoogleMLKit/BarcodeScanning (~> 6.0.0)
+  - nanopb (2.30910.0):
+    - nanopb/decode (= 2.30910.0)
+    - nanopb/encode (= 2.30910.0)
+  - nanopb/decode (2.30910.0)
+  - nanopb/encode (2.30910.0)
+  - objective_c (0.0.1):
+    - Flutter
+  - permission_handler_apple (9.3.0):
+    - Flutter
+  - PromisesObjC (2.4.0)
+  - SDWebImage (5.21.1):
+    - SDWebImage/Core (= 5.21.1)
+  - SDWebImage/Core (5.21.1)
+  - sqlite3 (3.50.4):
+    - sqlite3/common (= 3.50.4)
+  - sqlite3/common (3.50.4)
+  - sqlite3/dbstatvtab (3.50.4):
+    - sqlite3/common
+  - sqlite3/fts5 (3.50.4):
+    - sqlite3/common
+  - sqlite3/math (3.50.4):
+    - sqlite3/common
+  - sqlite3/perf-threadsafe (3.50.4):
+    - sqlite3/common
+  - sqlite3/rtree (3.50.4):
+    - sqlite3/common
+  - sqlite3/session (3.50.4):
+    - sqlite3/common
+  - sqlite3_flutter_libs (0.0.1):
+    - Flutter
+    - FlutterMacOS
+    - sqlite3 (~> 3.50.4)
+    - sqlite3/dbstatvtab
+    - sqlite3/fts5
+    - sqlite3/math
+    - sqlite3/perf-threadsafe
+    - sqlite3/rtree
+    - sqlite3/session
+  - SwiftyGif (5.4.5)
+
+DEPENDENCIES:
+  - audioplayers_darwin (from `.symlinks/plugins/audioplayers_darwin/darwin`)
+  - bonsoir_darwin (from `.symlinks/plugins/bonsoir_darwin/darwin`)
+  - file_picker (from `.symlinks/plugins/file_picker/ios`)
+  - Flutter (from `Flutter`)
+  - image_picker_ios (from `.symlinks/plugins/image_picker_ios/ios`)
+  - mobile_scanner (from `.symlinks/plugins/mobile_scanner/ios`)
+  - objective_c (from `.symlinks/plugins/objective_c/ios`)
+  - permission_handler_apple (from `.symlinks/plugins/permission_handler_apple/ios`)
+  - sqlite3_flutter_libs (from `.symlinks/plugins/sqlite3_flutter_libs/darwin`)
+
+SPEC REPOS:
+  trunk:
+    - DKImagePickerController
+    - DKPhotoGallery
+    - GoogleDataTransport
+    - GoogleMLKit
+    - GoogleToolboxForMac
+    - GoogleUtilities
+    - GoogleUtilitiesComponents
+    - GTMSessionFetcher
+    - MLImage
+    - MLKitBarcodeScanning
+    - MLKitCommon
+    - MLKitVision
+    - nanopb
+    - PromisesObjC
+    - SDWebImage
+    - sqlite3
+    - SwiftyGif
+
+EXTERNAL SOURCES:
+  audioplayers_darwin:
+    :path: ".symlinks/plugins/audioplayers_darwin/darwin"
+  bonsoir_darwin:
+    :path: ".symlinks/plugins/bonsoir_darwin/darwin"
+  file_picker:
+    :path: ".symlinks/plugins/file_picker/ios"
+  Flutter:
+    :path: Flutter
+  image_picker_ios:
+    :path: ".symlinks/plugins/image_picker_ios/ios"
+  mobile_scanner:
+    :path: ".symlinks/plugins/mobile_scanner/ios"
+  objective_c:
+    :path: ".symlinks/plugins/objective_c/ios"
+  permission_handler_apple:
+    :path: ".symlinks/plugins/permission_handler_apple/ios"
+  sqlite3_flutter_libs:
+    :path: ".symlinks/plugins/sqlite3_flutter_libs/darwin"
+
+SPEC CHECKSUMS:
+  audioplayers_darwin: 4027b33a8f471d996c13f71cb77f0b1583b5d923
+  bonsoir_darwin: e3b8526c42ca46a885142df84229131dfabea842
+  DKImagePickerController: 946cec48c7873164274ecc4624d19e3da4c1ef3c
+  DKPhotoGallery: b3834fecb755ee09a593d7c9e389d8b5d6deed60
+  file_picker: 15fd9539e4eb735dc54bae8c0534a7a9511a03de
+  Flutter: cabc95a1d2626b1b06e7179b784ebcf0c0cde467
+  GoogleDataTransport: 6c09b596d841063d76d4288cc2d2f42cc36e1e2a
+  GoogleMLKit: 97ac7af399057e99182ee8edfa8249e3226a4065
+  GoogleToolboxForMac: d1a2cbf009c453f4d6ded37c105e2f67a32206d8
+  GoogleUtilities: ea963c370a38a8069cc5f7ba4ca849a60b6d7d15
+  GoogleUtilitiesComponents: 679b2c881db3b615a2777504623df6122dd20afe
+  GTMSessionFetcher: 5aea5ba6bd522a239e236100971f10cb71b96ab6
+  image_picker_ios: 4f2f91b01abdb52842a8e277617df877e40f905b
+  MLImage: 1824212150da33ef225fbd3dc49f184cf611046c
+  MLKitBarcodeScanning: 10ca0845a6d15f2f6e911f682a1998b68b973e8b
+  MLKitCommon: afec63980417d29ffbb4790529a1b0a2291699e1
+  MLKitVision: e858c5f125ecc288e4a31127928301eaba9ae0c1
+  mobile_scanner: 96e91f2e1fb396bb7df8da40429ba8dfad664740
+  nanopb: 438bc412db1928dac798aa6fd75726007be04262
+  objective_c: 77e887b5ba1827970907e10e832eec1683f3431d
+  permission_handler_apple: 9878588469a2b0d0fc1e048d9f43605f92e6cec2
+  PromisesObjC: f5707f49cb48b9636751c5b2e7d227e43fba9f47
+  SDWebImage: f29024626962457f3470184232766516dee8dfea
+  sqlite3: 73513155ec6979715d3904ef53a8d68892d4032b
+  sqlite3_flutter_libs: 86f82662868ee26ff3451f73cac9c5fc2a1f57fa
+  SwiftyGif: 706c60cf65fa2bc5ee0313beece843c8eb8194d4
+
+PODFILE CHECKSUM: 3c63482e143d1b91d2d2560aee9fb04ecc74ac7e
+
+COCOAPODS: 1.16.2
diff --git a/apps/app/ios/Runner.xcodeproj/project.pbxproj b/apps/app/ios/Runner.xcodeproj/project.pbxproj
index 32b3a8e..0a663ea 100644
--- a/apps/app/ios/Runner.xcodeproj/project.pbxproj
+++ b/apps/app/ios/Runner.xcodeproj/project.pbxproj
@@ -10,6 +10,8 @@
 		1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */ = {isa = PBXBuildFile; fileRef = 1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */; };
 		331C808B294A63AB00263BE5 /* RunnerTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 331C807B294A618700263BE5 /* RunnerTests.swift */; };
 		3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */ = {isa = PBXBuildFile; fileRef = 3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */; };
+		51DBF7C9342CCC1E84264FAF /* Pods_RunnerTests.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 57CE06CA7580196D1806764B /* Pods_RunnerTests.framework */; };
+		576F22A04C2FA735A59CCB8C /* Pods_Runner.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 8D742755804ABA6F6EFA09B0 /* Pods_Runner.framework */; };
 		74858FAF1ED2DC5600515810 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 74858FAE1ED2DC5600515810 /* AppDelegate.swift */; };
 		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
 		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
@@ -44,10 +46,16 @@
 		1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratedPluginRegistrant.m; sourceTree = "<group>"; };
 		331C807B294A618700263BE5 /* RunnerTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RunnerTests.swift; sourceTree = "<group>"; };
 		331C8081294A63A400263BE5 /* RunnerTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = RunnerTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
+		34B441CD4D8D7C51D92293E3 /* Pods-Runner.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.debug.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"; sourceTree = "<group>"; };
 		3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = AppFrameworkInfo.plist; path = Flutter/AppFrameworkInfo.plist; sourceTree = "<group>"; };
+		4E75157E0476F57C9A36AAFF /* Pods-RunnerTests.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.release.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.release.xcconfig"; sourceTree = "<group>"; };
+		57CE06CA7580196D1806764B /* Pods_RunnerTests.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_RunnerTests.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "Runner-Bridging-Header.h"; sourceTree = "<group>"; };
 		74858FAE1ED2DC5600515810 /* AppDelegate.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = Release.xcconfig; path = Flutter/Release.xcconfig; sourceTree = "<group>"; };
+		7CAA68E8ECB59955A38AF698 /* Pods-RunnerTests.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.profile.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.profile.xcconfig"; sourceTree = "<group>"; };
+		7DB0FB06F75F1BDF46E6C95B /* Pods-RunnerTests.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-RunnerTests.debug.xcconfig"; path = "Target Support Files/Pods-RunnerTests/Pods-RunnerTests.debug.xcconfig"; sourceTree = "<group>"; };
+		8D742755804ABA6F6EFA09B0 /* Pods_Runner.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Runner.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		9740EEB21CF90195004384FC /* Debug.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Debug.xcconfig; path = Flutter/Debug.xcconfig; sourceTree = "<group>"; };
 		9740EEB31CF90195004384FC /* Generated.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Generated.xcconfig; path = Flutter/Generated.xcconfig; sourceTree = "<group>"; };
 		97C146EE1CF9000F007C117D /* Runner.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Runner.app; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -55,13 +63,24 @@
 		97C146FD1CF9000F007C117D /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		97C147001CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
 		97C147021CF9000F007C117D /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		D4D50D0F4B952368E1319826 /* Pods-Runner.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.profile.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig"; sourceTree = "<group>"; };
+		F6B684F378DF7FE6F2C3CABC /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
+		373154A272D279F7BAD56A3D /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				51DBF7C9342CCC1E84264FAF /* Pods_RunnerTests.framework in Frameworks */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		97C146EB1CF9000F007C117D /* Frameworks */ = {
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				576F22A04C2FA735A59CCB8C /* Pods_Runner.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -76,6 +95,15 @@
 			path = RunnerTests;
 			sourceTree = "<group>";
 		};
+		86E8FF9E84BDE142E9B2A7E5 /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				8D742755804ABA6F6EFA09B0 /* Pods_Runner.framework */,
+				57CE06CA7580196D1806764B /* Pods_RunnerTests.framework */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
 		9740EEB11CF90186004384FC /* Flutter */ = {
 			isa = PBXGroup;
 			children = (
@@ -94,6 +122,8 @@
 				97C146F01CF9000F007C117D /* Runner */,
 				97C146EF1CF9000F007C117D /* Products */,
 				331C8082294A63A400263BE5 /* RunnerTests */,
+				A70DA976E0448863AE3AAB92 /* Pods */,
+				86E8FF9E84BDE142E9B2A7E5 /* Frameworks */,
 			);
 			sourceTree = "<group>";
 		};
@@ -121,6 +151,20 @@
 			path = Runner;
 			sourceTree = "<group>";
 		};
+		A70DA976E0448863AE3AAB92 /* Pods */ = {
+			isa = PBXGroup;
+			children = (
+				34B441CD4D8D7C51D92293E3 /* Pods-Runner.debug.xcconfig */,
+				F6B684F378DF7FE6F2C3CABC /* Pods-Runner.release.xcconfig */,
+				D4D50D0F4B952368E1319826 /* Pods-Runner.profile.xcconfig */,
+				7DB0FB06F75F1BDF46E6C95B /* Pods-RunnerTests.debug.xcconfig */,
+				4E75157E0476F57C9A36AAFF /* Pods-RunnerTests.release.xcconfig */,
+				7CAA68E8ECB59955A38AF698 /* Pods-RunnerTests.profile.xcconfig */,
+			);
+			name = Pods;
+			path = Pods;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -128,8 +172,10 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 331C8087294A63A400263BE5 /* Build configuration list for PBXNativeTarget "RunnerTests" */;
 			buildPhases = (
+				72139F7C55C8F7C501C7B164 /* [CP] Check Pods Manifest.lock */,
 				331C807D294A63A400263BE5 /* Sources */,
 				331C807F294A63A400263BE5 /* Resources */,
+				373154A272D279F7BAD56A3D /* Frameworks */,
 			);
 			buildRules = (
 			);
@@ -145,12 +191,15 @@
 			isa = PBXNativeTarget;
 			buildConfigurationList = 97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */;
 			buildPhases = (
+				88859AD75AFEC32170AD0FCA /* [CP] Check Pods Manifest.lock */,
 				9740EEB61CF901F6004384FC /* Run Script */,
 				97C146EA1CF9000F007C117D /* Sources */,
 				97C146EB1CF9000F007C117D /* Frameworks */,
 				97C146EC1CF9000F007C117D /* Resources */,
 				9705A1C41CF9048500538489 /* Embed Frameworks */,
 				3B06AD1E1E4923F5004D2608 /* Thin Binary */,
+				9DCF60722691A8C657DDBEC4 /* [CP] Embed Pods Frameworks */,
+				AB0501777866B4369253924C /* [CP] Copy Pods Resources */,
 			);
 			buildRules = (
 			);
@@ -238,6 +287,50 @@
 			shellPath = /bin/sh;
 			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" embed_and_thin";
 		};
+		72139F7C55C8F7C501C7B164 /* [CP] Check Pods Manifest.lock */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+				"${PODS_PODFILE_DIR_PATH}/Podfile.lock",
+				"${PODS_ROOT}/Manifest.lock",
+			);
+			name = "[CP] Check Pods Manifest.lock";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+				"$(DERIVED_FILE_DIR)/Pods-RunnerTests-checkManifestLockResult.txt",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
+			showEnvVarsInLog = 0;
+		};
+		88859AD75AFEC32170AD0FCA /* [CP] Check Pods Manifest.lock */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+				"${PODS_PODFILE_DIR_PATH}/Podfile.lock",
+				"${PODS_ROOT}/Manifest.lock",
+			);
+			name = "[CP] Check Pods Manifest.lock";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+				"$(DERIVED_FILE_DIR)/Pods-Runner-checkManifestLockResult.txt",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
+			showEnvVarsInLog = 0;
+		};
 		9740EEB61CF901F6004384FC /* Run Script */ = {
 			isa = PBXShellScriptBuildPhase;
 			alwaysOutOfDate = 1;
@@ -253,6 +346,40 @@
 			shellPath = /bin/sh;
 			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" build";
 		};
+		9DCF60722691A8C657DDBEC4 /* [CP] Embed Pods Frameworks */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks-${CONFIGURATION}-input-files.xcfilelist",
+			);
+			name = "[CP] Embed Pods Frameworks";
+			outputFileListPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks-${CONFIGURATION}-output-files.xcfilelist",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
+		AB0501777866B4369253924C /* [CP] Copy Pods Resources */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-resources-${CONFIGURATION}-input-files.xcfilelist",
+			);
+			name = "[CP] Copy Pods Resources";
+			outputFileListPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-resources-${CONFIGURATION}-output-files.xcfilelist",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-resources.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
 /* End PBXShellScriptBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
@@ -379,6 +506,7 @@
 		};
 		331C8088294A63A400263BE5 /* Debug */ = {
 			isa = XCBuildConfiguration;
+			baseConfigurationReference = 7DB0FB06F75F1BDF46E6C95B /* Pods-RunnerTests.debug.xcconfig */;
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
@@ -396,6 +524,7 @@
 		};
 		331C8089294A63A400263BE5 /* Release */ = {
 			isa = XCBuildConfiguration;
+			baseConfigurationReference = 4E75157E0476F57C9A36AAFF /* Pods-RunnerTests.release.xcconfig */;
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
@@ -411,6 +540,7 @@
 		};
 		331C808A294A63A400263BE5 /* Profile */ = {
 			isa = XCBuildConfiguration;
+			baseConfigurationReference = 7CAA68E8ECB59955A38AF698 /* Pods-RunnerTests.profile.xcconfig */;
 			buildSettings = {
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
diff --git a/apps/app/ios/Runner.xcworkspace/contents.xcworkspacedata b/apps/app/ios/Runner.xcworkspace/contents.xcworkspacedata
index 1d526a1..21a3cc1 100644
--- a/apps/app/ios/Runner.xcworkspace/contents.xcworkspacedata
+++ b/apps/app/ios/Runner.xcworkspace/contents.xcworkspacedata
@@ -4,4 +4,7 @@
    <FileRef
       location = "group:Runner.xcodeproj">
    </FileRef>
+   <FileRef
+      location = "group:Pods/Pods.xcodeproj">
+   </FileRef>
 </Workspace>
diff --git a/apps/app/ios/Runner/Info.plist b/apps/app/ios/Runner/Info.plist
index 97f115d..a7e47ac 100644
--- a/apps/app/ios/Runner/Info.plist
+++ b/apps/app/ios/Runner/Info.plist
@@ -45,5 +45,23 @@
 	<true/>
 	<key>UIApplicationSupportsIndirectInputEvents</key>
 	<true/>
+	<key>NSLocalNetworkUsageDescription</key>
+	<string>주변 친구들과 게임을 하기 위해 로컬 네트워크 권한이 필요합니다.</string>
+	<key>NSBonjourServices</key>
+	<array>
+		<string>_playwith._tcp</string>
+	</array>
+	<key>GADApplicationIdentifier</key>
+		<string>ca-app-pub-3940256099942544~1458002511</string>
+	<key>NSCameraUsageDescription</key>
+		<string>QR 코드를 스캔하여 방에 접속하기 위해 카메라 권한이 필요합니다.</string>
+	<key>NSPhotoLibraryUsageDescription</key>
+    <string>채팅방에 사진을 공유하기 위해 갤러리 접근 권한이 필요합니다.</string>
+    
+    <key>NSCameraUsageDescription</key>
+    <string>사진을 찍어 공유하기 위해 카메라 권한이 필요합니다.</string>
+    
+    <key>NSMicrophoneUsageDescription</key>
+    <string>동영상 촬영을 위해 마이크 권한이 필요합니다.</string>
 </dict>
 </plist>
diff --git a/apps/app/lib/intro_screen.dart b/apps/app/lib/intro_screen.dart
index 029db0b..8351fd9 100644
--- a/apps/app/lib/intro_screen.dart
+++ b/apps/app/lib/intro_screen.dart
@@ -1,5 +1,7 @@
+import 'dart:io'; // Platform 확인용
 import 'package:flutter/material.dart';
-import 'package:playwith_core/playwith_core.dart'; // Core 패키지 import
+import 'package:permission_handler/permission_handler.dart';
+import 'package:playwith_core/playwith_core.dart';
 import 'lobby_screen.dart';
 
 class IntroScreen extends StatefulWidget {
@@ -12,13 +14,47 @@ class IntroScreen extends StatefulWidget {
 class _IntroScreenState extends State<IntroScreen> {
   final _nicknameController = TextEditingController();
 
-  void _enterLobby() {
-    if (_nicknameController.text.trim().isEmpty) return;
+  Future<void> _enterLobby() async {
+    if (_nicknameController.text.trim().isEmpty) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(content: Text("닉네임을 입력해주세요.")),
+      );
+      return;
+    }
 
-    // 1. Core 패키지의 NetworkManager 초기화
+    // [수정됨] 플랫폼별 권한 분기 처리
+    if (Platform.isAndroid) {
+      // 🤖 안드로이드: 명시적 권한 요청 필요
+      Map<Permission, PermissionStatus> statuses = await [
+        Permission.location, // 안드로이드 12 이하
+        Permission.nearbyWifiDevices, // 안드로이드 13 이상
+      ].request();
+
+      // 로그 확인용
+      bool isNearby = statuses[Permission.nearbyWifiDevices]?.isGranted ?? false;
+      bool isLocation = statuses[Permission.location]?.isGranted ?? false;
+      print("Android 권한 Check: Nearby=$isNearby, Location=$isLocation");
+
+      // 둘 다 거부되면 진행 불가 (단, 버전에 따라 하나만 있어도 됨)
+      // 여기서는 "둘 다 false일 때만" 막는 것으로 완화
+      if (!isNearby && !isLocation) {
+        if (!mounted) return;
+        ScaffoldMessenger.of(context).showSnackBar(
+          const SnackBar(content: Text("❌ 안드로이드는 권한이 필요합니다.")),
+        );
+        return;
+      }
+    } else if (Platform.isIOS) {
+      // 🍎 iOS: 별도 요청 불필요
+      // Info.plist에 설정만 잘 되어 있다면, 
+      // NetworkManager가 start() 될 때 시스템이 알아서 물어봅니다.
+      print("iOS는 권한 체크를 건너뜁니다. (실행 시 자동 팝업됨)");
+    }
+
+    // 초기화 및 입장
     NetworkManager().initialize(nickname: _nicknameController.text.trim());
 
-    // 2. 로비 화면으로 이동
+    if (!mounted) return;
     Navigator.push(
       context,
       MaterialPageRoute(builder: (_) => const LobbyScreen()),
diff --git a/apps/app/lib/lobby_screen.dart b/apps/app/lib/lobby_screen.dart
index 4d22394..ef8cb69 100644
--- a/apps/app/lib/lobby_screen.dart
+++ b/apps/app/lib/lobby_screen.dart
@@ -1,6 +1,10 @@
+import 'dart:convert';
 import 'package:bonsoir/bonsoir.dart';
 import 'package:flutter/material.dart';
-import 'package:playwith_core/playwith_core.dart';
+import 'package:mobile_scanner/mobile_scanner.dart';
+import 'package:playwith_core/playwith_core.dart'; // GameChatOverlay 포함됨
+import 'package:playwith_game_quiz/quiz_game.dart';
+import 'package:qr_flutter/qr_flutter.dart';
 
 class LobbyScreen extends StatefulWidget {
   const LobbyScreen({super.key});
@@ -10,174 +14,470 @@ class LobbyScreen extends StatefulWidget {
 }
 
 class _LobbyScreenState extends State<LobbyScreen> {
-  final _net = NetworkManager(); // Singleton 인스턴스
+  final _net = NetworkManager();
+  final List<String> _logs = [];
+  final ScrollController _scrollController = ScrollController();
+
+  @override
+  void initState() {
+    super.initState();
+    
+    _net.logStream.listen((log) {
+      if (!mounted) return;
+      setState(() {
+        _logs.add(log);
+        if (_logs.length > 100) _logs.removeAt(0);
+      });
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        if (_scrollController.hasClients) {
+          _scrollController.animateTo(
+            _scrollController.position.maxScrollExtent,
+            duration: const Duration(milliseconds: 200),
+            curve: Curves.easeOut,
+          );
+        }
+      });
+    });
+
+    _net.messageStream.listen((data) {
+      if (data['type'] == 'GAME_START') {
+        final String gameId = data['gameId'];
+        if (gameId == 'quiz_ox') {
+          _startGameAndNavigate(QuizGame());
+        }
+      }
+    });
+  }
+
+  // [핵심] 채팅 오버레이 적용
+  void _startGameAndNavigate(BaseGame game) {
+    if (!mounted) return;
+    
+    game.onStart();
+
+    Navigator.push(
+      context,
+      MaterialPageRoute(builder: (context) {
+        Widget gameView;
+        if (_net.role == NetworkRole.host) {
+          gameView = game.buildHostView(context);
+        } else {
+          gameView = game.buildGuestView(context);
+        }
+
+        // 플랫폼 구조: 게임 화면 위에 채팅창 오버레이
+        return Stack(
+          children: [
+            gameView, // 1. 게임 화면
+            const SafeArea(
+              child: GameChatOverlay(), // 2. 채팅창 (Core 제공)
+            ),
+          ],
+        );
+      }),
+    );
+  }
 
   @override
   Widget build(BuildContext context) {
-    // NetworkManager의 상태(notifyListeners)가 변경될 때마다 화면 다시 그림
     return ListenableBuilder(
       listenable: _net,
       builder: (context, child) {
         return Scaffold(
           appBar: AppBar(
-            title: Text('안녕하세요, ${_net.me.nickname}님'),
+            title: Text('대기실: ${_net.me.nickname}'),
             actions: [
+              if (_net.role == NetworkRole.host)
+                IconButton(
+                  icon: const Icon(Icons.qr_code, size: 30),
+                  onPressed: () => _showHostQRDialog(),
+                ),
+              
               if (_net.role != NetworkRole.none)
                 IconButton(
-                  icon: const Icon(Icons.close),
-                  onPressed: () => _net.stopNetwork(), // 연결 끊기
+                  icon: const Icon(Icons.exit_to_app),
+                  onPressed: () => _net.stopNetwork(),
                 )
             ],
           ),
-          body: _buildBody(),
+          body: Column(
+            children: [
+              Expanded(flex: 3, child: _buildBody()),
+              const Divider(thickness: 2, color: Colors.grey),
+              _buildDebugConsole(),
+            ],
+          ),
         );
       },
     );
   }
 
-  Widget _buildBody() {
-    // 1. 아무 역할도 없을 때 -> 선택 화면
-    if (_net.role == NetworkRole.none) {
-      return Center(
-        child: Row(
-          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
-          children: [
-            _BigButton(
-              title: "방 만들기\n(Host)",
-              color: Colors.blue[100]!,
-              onTap: () => _net.startHosting("${_net.me.nickname}의 방"),
-            ),
-            _BigButton(
-              title: "방 찾기\n(Guest)",
-              color: Colors.green[100]!,
-              onTap: () => _showRoomListDialog(),
-            ),
-          ],
+  Widget _buildDebugConsole() {
+    return Column(
+      children: [
+        Container(
+          width: double.infinity,
+          padding: const EdgeInsets.all(8.0),
+          color: Colors.black87,
+          child: const Text("DEBUG LOGS", style: TextStyle(color: Colors.white, fontWeight: FontWeight.bold)),
         ),
-      );
-    }
-
-    // 2. Host 상태일 때 -> 대기실 화면
-    if (_net.role == NetworkRole.host) {
-      return Center(
-        child: Column(
-          mainAxisAlignment: MainAxisAlignment.center,
-          children: [
-            const Text("👑 방장입니다", style: TextStyle(fontSize: 24)),
-            const SizedBox(height: 20),
-            const CircularProgressIndicator(),
-            const SizedBox(height: 20),
-            const Text("참가자를 기다리는 중..."),
-            // TODO: 여기에 접속한 게스트 목록 표시 예정
-          ],
-        ),
-      );
-    }
-
-    // 3. Guest 상태일 때 -> 대기실 화면
-    if (_net.role == NetworkRole.guest) {
-      return const Center(
-        child: Column(
-          mainAxisAlignment: MainAxisAlignment.center,
-          children: [
-            Text("✅ 접속 완료!", style: TextStyle(fontSize: 24)),
-            SizedBox(height: 20),
-            Text("방장이 게임을 시작하기를 기다리세요."),
-          ],
-        ),
-      );
-    }
-
-    return const SizedBox();
-  }
-
-  // [Guest용] 방 목록 팝업
-  void _showRoomListDialog() {
-    showDialog(
-      context: context,
-      builder: (context) {
-        return AlertDialog(
-          title: const Text("방 찾는 중..."),
-          content: SizedBox(
-            width: double.maxFinite,
-            height: 300,
-            child: StreamBuilder<List<BonsoirService>>(
-              stream: _net.discoverRooms(), // Core의 방 찾기 스트림
-              builder: (context, snapshot) {
-                if (!snapshot.hasData || snapshot.data!.isEmpty) {
-                  return const Center(child: Text("발견된 방이 없습니다.\n(같은 와이파이인지 확인하세요)"));
-                }
-
-                final services = snapshot.data!;
-                return ListView.builder(
-                  itemCount: services.length,
-                  itemBuilder: (context, index) {
-                    final service = services[index];
-                    // 이름 포맷: "방이름#ID" -> "방이름"만 파싱
-                    final displayName = service.name.split('#').first;
-
-                    return ListTile(
-                      leading: const Icon(Icons.meeting_room),
-                      title: Text(displayName),
-                      subtitle: Text(service.host ?? "IP 정보 없음"),
-                      onTap: () async {
-                        Navigator.pop(context); // 다이얼로그 닫기
-                        // 해당 방으로 접속 시도 (IP는 service.attributes나 resolve 과정 필요)
-                        // Bonsoir는 service.host에 호스트네임이 들어오므로 resolve 필요
-                        // MVP 단계에서는 간단히:
-                         await _resolveAndJoin(service);
-                      },
-                    );
-                  },
+        SizedBox(
+          height: 150, 
+          child: Container(
+            color: Colors.black,
+            child: ListView.builder(
+              controller: _scrollController,
+              itemCount: _logs.length,
+              itemBuilder: (context, index) {
+                return Padding(
+                  padding: const EdgeInsets.symmetric(horizontal: 8.0, vertical: 2.0),
+                  child: Text(
+                    _logs[index],
+                    style: const TextStyle(color: Colors.greenAccent, fontSize: 12, fontFamily: 'Courier'),
+                  ),
                 );
               },
             ),
           ),
-        );
-      },
+        ),
+      ],
     );
   }
 
-  // Bonsoir Service Resolve (IP 주소 알아내기)
-  Future<void> _resolveAndJoin(BonsoirService service) async {
-     // 실제로는 service.resolve() 호출 후 IP 획득 과정을 거쳐야 함.
-     // Bonsoir 패키지 특성상 resolve가 비동기로 돔.
-     // MVP 간소화를 위해 service에 host 정보가 있다고 가정하거나
-     // Broadcast 시점에 attributes에 IP를 넣는 방식을 추천하지만,
-     // 일단 resolve 시도:
-     if (service is BonsoirBroadcast) {
-       // 이미 broadcast 객체라면 바로 정보가 있음 (내가 만든 방)
-     } else {
-       await service.resolve(service.resolveRealService);
-     }
-     
-     // IP가 ipv4 형태인지 확인 필요. 보통 service.ip 나 attributes 사용
-     // 여기선 port만 확실하므로, 실제 IP 획득은 Bonsoir 예제 참고 필요
-     // (테스트 환경에서는 보통 service.attributes에 {'ip': '192.168...'} 넣어서 보냄)
-     
-     // *중요*: 실제 구현 시 NetworkManager.startHosting에서 attributes에 IP를 넣어주는게 가장 확실함.
-     // 일단 현재 코드는 로직 흐름만 잡음.
-     
-     // _net.joinRoom('192.168.0.xxx', service.port); 
+  Widget _buildBody() {
+    if (_net.role == NetworkRole.none) {
+      return Center(
+        child: SingleChildScrollView(
+          child: Column(
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: [
+              Row(
+                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+                children: [
+                  _BigButton(
+                    title: "방 만들기\n(Host)",
+                    color: Colors.blue[100]!,
+                    icon: Icons.add_home_work,
+                    onTap: () {
+                      _net.startHosting("${_net.me.nickname}의 방");
+                      Future.delayed(const Duration(milliseconds: 500), () {
+                        if (mounted && _net.role == NetworkRole.host) _showHostQRDialog();
+                      });
+                    },
+                  ),
+                  _BigButton(
+                    title: "방 찾기\n(Guest)",
+                    color: Colors.green[100]!,
+                    icon: Icons.search,
+                    onTap: () => _showRoomListDialog(),
+                  ),
+                ],
+              ),
+              const SizedBox(height: 30),
+              ElevatedButton.icon(
+                icon: const Icon(Icons.qr_code_scanner, size: 28),
+                label: const Text("QR 코드로 접속하기"),
+                style: ElevatedButton.styleFrom(
+                  padding: const EdgeInsets.symmetric(horizontal: 30, vertical: 15),
+                ),
+                onPressed: () => _openQRScanner(),
+              ),
+              const SizedBox(height: 10),
+              TextButton(
+                 onPressed: () => _showManualJoinDialog(),
+                 child: const Text("IP 주소 직접 입력 (비상용)", style: TextStyle(color: Colors.grey)),
+              ),
+            ],
+          ),
+        ),
+      );
+    }
+
+    return Column(
+      children: [
+        Container(
+          padding: const EdgeInsets.all(20.0),
+          color: Colors.grey[100],
+          width: double.infinity,
+          child: Column(
+            children: [
+              Row(
+                mainAxisAlignment: MainAxisAlignment.center,
+                children: [
+                  Icon(_net.role == NetworkRole.host ? Icons.wifi_tethering : Icons.wifi, color: Colors.blue),
+                  const SizedBox(width: 10),
+                  Text(
+                    _net.role == NetworkRole.host ? "👑 방장 (나)" : "참가자 (나)",
+                    style: const TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
+                  ),
+                ],
+              ),
+              
+              if (_net.role == NetworkRole.host) ...[
+                 const SizedBox(height: 10),
+                 Row(
+                   mainAxisAlignment: MainAxisAlignment.center,
+                   children: [
+                     SelectableText(
+                       "IP: ${_net.hostIp}  /  Port: ${_net.hostPort}", 
+                       style: const TextStyle(fontWeight: FontWeight.bold, fontSize: 16),
+                     ),
+                     const SizedBox(width: 10),
+                     InkWell(
+                       onTap: () => _showHostQRDialog(),
+                       child: const Icon(Icons.qr_code, color: Colors.black87),
+                     )
+                   ],
+                 ),
+                 const SizedBox(height: 5),
+                 const Text("QR 버튼을 눌러 친구들을 초대하세요!", style: TextStyle(fontSize: 12, color: Colors.grey)),
+              ],
+            ],
+          ),
+        ),
+
+        const Divider(height: 1),
+
+        Expanded(
+          child: ListView(
+            padding: const EdgeInsets.all(16),
+            children: [
+              const Text("참가자 목록", style: TextStyle(color: Colors.grey)),
+              const SizedBox(height: 10),
+              _buildUserTile(_net.me),
+              ..._net.guestList.map((guest) => _buildUserTile(guest)),
+              
+              if (_net.guestList.isEmpty && _net.role == NetworkRole.host)
+                const Padding(
+                  padding: EdgeInsets.all(40.0),
+                  child: Center(child: Text("참가자를 기다리는 중...\nQR 코드를 보여주세요.", textAlign: TextAlign.center, style: TextStyle(color: Colors.grey))),
+                ),
+            ],
+          ),
+        ),
+
+        _buildReadyButton(),
+      ],
+    );
+  }
+
+  Widget _buildUserTile(UserInfo user) {
+    bool isMe = user.id == _net.me.id;
+    return Card(
+      elevation: 2,
+      color: user.isReady ? Colors.green[50] : Colors.white,
+      margin: const EdgeInsets.symmetric(vertical: 6),
+      child: ListTile(
+        leading: CircleAvatar(
+          backgroundColor: Color(user.colorValue),
+          child: Text(user.nickname[0], style: const TextStyle(color: Colors.white, fontWeight: FontWeight.bold)),
+        ),
+        title: Text(
+          user.nickname + (isMe ? " (나)" : ""),
+          style: const TextStyle(fontWeight: FontWeight.bold),
+        ),
+        trailing: user.isReady
+            ? const Icon(Icons.check_circle, color: Colors.green, size: 32)
+            : const Icon(Icons.hourglass_empty, color: Colors.grey, size: 32),
+      ),
+    );
+  }
+
+  Widget _buildReadyButton() {
+    bool isReady = _net.me.isReady;
+    bool canReady = _net.role == NetworkRole.host 
+        ? _net.guestList.isNotEmpty 
+        : true; 
+
+    return Container(
+      width: double.infinity,
+      padding: const EdgeInsets.all(20),
+      decoration: BoxDecoration(
+        color: Colors.white,
+        boxShadow: [BoxShadow(color: Colors.black12, blurRadius: 10, offset: const Offset(0, -5))],
+      ),
+      child: ElevatedButton(
+        onPressed: canReady 
+            ? () => _net.toggleReady()
+            : () {
+                ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text("참가자가 들어와야 게임을 시작할 수 있습니다.")));
+              },
+        style: ElevatedButton.styleFrom(
+          backgroundColor: !canReady 
+              ? Colors.grey 
+              : (isReady ? Colors.redAccent : Colors.blueAccent),
+          padding: const EdgeInsets.symmetric(vertical: 18),
+          shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
+          elevation: canReady ? 5 : 0,
+        ),
+        child: Text(
+          isReady ? "준비 취소 (WAIT)" : "준비 완료 (READY)",
+          style: const TextStyle(fontSize: 20, fontWeight: FontWeight.bold, color: Colors.white),
+        ),
+      ),
+    );
+  }
+
+  void _showHostQRDialog() {
+    if (_net.hostIp == null || _net.hostPort == null) return;
+    final qrData = jsonEncode({'ip': _net.hostIp, 'port': _net.hostPort});
+    showDialog(
+      context: context,
+      builder: (context) => Dialog(
+        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(20)),
+        child: Padding(
+          padding: const EdgeInsets.all(24.0),
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              const Text("초대 QR 코드", style: TextStyle(fontSize: 22, fontWeight: FontWeight.bold)),
+              const SizedBox(height: 20),
+              Container(
+                padding: const EdgeInsets.all(10),
+                decoration: BoxDecoration(border: Border.all(color: Colors.black12), borderRadius: BorderRadius.circular(10)),
+                child: QrImageView(data: qrData, version: QrVersions.auto, size: 220.0),
+              ),
+              const SizedBox(height: 20),
+              Text("IP: ${_net.hostIp}  /  Port: ${_net.hostPort}", style: const TextStyle(color: Colors.grey)),
+              const SizedBox(height: 20),
+              ElevatedButton(onPressed: () => Navigator.pop(context), child: const Text("닫기"))
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+
+  void _openQRScanner() {
+    bool isScanCompleted = false;
+    Navigator.of(context).push(MaterialPageRoute(
+      builder: (context) => Scaffold(
+        appBar: AppBar(title: const Text("QR 코드 스캔")),
+        body: MobileScanner(
+          onDetect: (capture) {
+            if (isScanCompleted) return;
+            final List<Barcode> barcodes = capture.barcodes;
+            for (final barcode in barcodes) {
+              final String? code = barcode.rawValue;
+              if (code != null) {
+                try {
+                  final data = jsonDecode(code);
+                  if (data['ip'] != null && data['port'] != null) {
+                    isScanCompleted = true;
+                    Navigator.pop(context);
+                    ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text("QR 인식 성공! 접속 중...")));
+                    _net.joinRoom(data['ip'], data['port']);
+                    return;
+                  }
+                } catch (e) {}
+              }
+            }
+          },
+        ),
+      ),
+    ));
+  }
+
+  void _showRoomListDialog() {
+    showDialog(
+      context: context,
+      builder: (context) => AlertDialog(
+        title: const Text("방 찾는 중..."),
+        content: SizedBox(
+          width: double.maxFinite,
+          height: 300,
+          child: StreamBuilder<List<BonsoirService>>(
+            stream: _net.discoverRooms(),
+            builder: (context, snapshot) {
+              if (!snapshot.hasData || snapshot.data!.isEmpty) {
+                return const Center(child: Text("검색 중... (로그를 확인하세요)"));
+              }
+              final services = snapshot.data!;
+              return ListView.builder(
+                itemCount: services.length,
+                itemBuilder: (context, index) {
+                  final service = services[index];
+                  final displayName = service.name.split('#').first;
+                  final ip = service.attributes?['ip'] ?? '알 수 없음';
+                  return ListTile(
+                    leading: const Icon(Icons.meeting_room),
+                    title: Text(displayName),
+                    subtitle: Text("IP: $ip"),
+                    onTap: () {
+                       Navigator.pop(context);
+                       if (service.attributes != null && service.attributes!['ip'] != null) {
+                         _net.joinRoom(service.attributes!['ip']!, service.port);
+                       }
+                    },
+                  );
+                },
+              );
+            },
+          ),
+        ),
+        actions: [TextButton(onPressed: () => Navigator.pop(context), child: const Text("닫기"))],
+      ),
+    );
+  }
+
+  void _showManualJoinDialog() {
+    final ipController = TextEditingController(text: "192.168.");
+    final portController = TextEditingController();
+    showDialog(
+      context: context,
+      builder: (context) => AlertDialog(
+        title: const Text("수동 접속"),
+        content: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            const Text("방장 화면의 IP/Port를 입력하세요."),
+            TextField(controller: ipController, decoration: const InputDecoration(labelText: "IP")),
+            TextField(controller: portController, decoration: const InputDecoration(labelText: "Port")),
+          ],
+        ),
+        actions: [
+          TextButton(onPressed: () => Navigator.pop(context), child: const Text("취소")),
+          ElevatedButton(
+            onPressed: () {
+              final ip = ipController.text.trim();
+              final port = int.tryParse(portController.text.trim());
+              if (ip.isNotEmpty && port != null) {
+                Navigator.pop(context);
+                _net.joinRoom(ip, port);
+              }
+            },
+            child: const Text("접속"),
+          ),
+        ],
+      ),
+    );
   }
 }
 
 class _BigButton extends StatelessWidget {
   final String title;
   final Color color;
+  final IconData icon;
   final VoidCallback onTap;
-
-  const _BigButton({required this.title, required this.color, required this.onTap});
-
+  const _BigButton({required this.title, required this.color, required this.icon, required this.onTap});
   @override
   Widget build(BuildContext context) {
     return GestureDetector(
       onTap: onTap,
       child: Container(
-        width: 150,
-        height: 150,
-        decoration: BoxDecoration(color: color, borderRadius: BorderRadius.circular(20)),
-        child: Center(child: Text(title, textAlign: TextAlign.center, style: const TextStyle(fontSize: 20, fontWeight: FontWeight.bold))),
+        width: 140, height: 140,
+        decoration: BoxDecoration(
+          color: color, borderRadius: BorderRadius.circular(20),
+          boxShadow: [BoxShadow(color: Colors.black12, blurRadius: 10, offset: const Offset(0, 5))],
+        ),
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: [
+            Icon(icon, size: 40, color: Colors.black54),
+            const SizedBox(height: 10),
+            Text(title, textAlign: TextAlign.center, style: const TextStyle(fontSize: 18, fontWeight: FontWeight.bold)),
+          ],
+        ),
       ),
     );
   }
diff --git a/apps/app/lib/main.dart b/apps/app/lib/main.dart
index 9439b20..4d6d894 100644
--- a/apps/app/lib/main.dart
+++ b/apps/app/lib/main.dart
@@ -1,13 +1,61 @@
 import 'package:flutter/material.dart';
+import 'package:playwith_core/playwith_core.dart';
+import 'package:playwith_game_quiz/quiz_game.dart'; // 퀴즈 모듈 import
 import 'intro_screen.dart';
 
 void main() {
+  // 1. 플러터 바인딩 초기화
+  WidgetsFlutterBinding.ensureInitialized();
+
+  // 2. 사운드 리소스 주입 (여기가 핵심!)
+  // AssetSource는 'assets/' 접두어를 자동으로 붙이므로 그 하위 경로만 적습니다.
+  SoundManager().initialize(soundPaths: {
+    SoundKey.bgm: 'audio/bgm.mp3',
+    SoundKey.correct: 'audio/correct.mp3',
+    SoundKey.wrong: 'audio/wrong.mp3',
+    SoundKey.win: 'audio/win.mp3',
+  });
+
   runApp(const PlayWithApp());
 }
 
-class PlayWithApp extends StatelessWidget {
+class PlayWithApp extends StatefulWidget {
   const PlayWithApp({super.key});
 
+  @override
+  State<PlayWithApp> createState() => _PlayWithAppState();
+}
+
+class _PlayWithAppState extends State<PlayWithApp> {
+  final _net = NetworkManager();
+
+  // 등록된 게임 목록
+  final List<BaseGame> _games = [
+    QuizGame(), // 여기서 등록!
+  ];
+
+  @override
+  void initState() {
+    super.initState();
+    
+    // [전역 라우팅] 네트워크 메시지를 감시하다가 'GAME_START'가 오면 해당 게임 실행
+    _net.messageStream.listen((data) {
+      if (data['type'] == 'GAME_START') {
+        final String gameId = data['gameId'];
+        
+        // ID에 맞는 게임 찾기
+        final game = _games.firstWhere(
+          (g) => g.id == gameId, 
+          orElse: () => throw Exception("Game not found: $gameId")
+        );
+
+        // 게임 화면으로 이동 (네비게이터 키를 안 쓰고 있어서 간단히 처리 불가, 아래 설명 참조)
+        // 실제로는 GlobalKey<NavigatorState>를 쓰거나, 현재 context를 찾아야 함.
+        // MVP에서는 LobbyScreen 내부에서 처리하는 것이 안전함.
+      }
+    });
+  }
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
diff --git a/apps/app/linux/flutter/generated_plugin_registrant.cc b/apps/app/linux/flutter/generated_plugin_registrant.cc
index e71a16d..b0cb8c8 100644
--- a/apps/app/linux/flutter/generated_plugin_registrant.cc
+++ b/apps/app/linux/flutter/generated_plugin_registrant.cc
@@ -6,6 +6,18 @@
 
 #include "generated_plugin_registrant.h"
 
+#include <audioplayers_linux/audioplayers_linux_plugin.h>
+#include <file_selector_linux/file_selector_plugin.h>
+#include <sqlite3_flutter_libs/sqlite3_flutter_libs_plugin.h>
 
 void fl_register_plugins(FlPluginRegistry* registry) {
+  g_autoptr(FlPluginRegistrar) audioplayers_linux_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "AudioplayersLinuxPlugin");
+  audioplayers_linux_plugin_register_with_registrar(audioplayers_linux_registrar);
+  g_autoptr(FlPluginRegistrar) file_selector_linux_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "FileSelectorPlugin");
+  file_selector_plugin_register_with_registrar(file_selector_linux_registrar);
+  g_autoptr(FlPluginRegistrar) sqlite3_flutter_libs_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "Sqlite3FlutterLibsPlugin");
+  sqlite3_flutter_libs_plugin_register_with_registrar(sqlite3_flutter_libs_registrar);
 }
diff --git a/apps/app/linux/flutter/generated_plugins.cmake b/apps/app/linux/flutter/generated_plugins.cmake
index 2e1de87..af61658 100644
--- a/apps/app/linux/flutter/generated_plugins.cmake
+++ b/apps/app/linux/flutter/generated_plugins.cmake
@@ -3,6 +3,9 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
+  audioplayers_linux
+  file_selector_linux
+  sqlite3_flutter_libs
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST
diff --git a/apps/app/macos/Flutter/GeneratedPluginRegistrant.swift b/apps/app/macos/Flutter/GeneratedPluginRegistrant.swift
index 6726dd8..8460a12 100644
--- a/apps/app/macos/Flutter/GeneratedPluginRegistrant.swift
+++ b/apps/app/macos/Flutter/GeneratedPluginRegistrant.swift
@@ -5,8 +5,16 @@
 import FlutterMacOS
 import Foundation
 
+import audioplayers_darwin
 import bonsoir_darwin
+import file_selector_macos
+import mobile_scanner
+import sqlite3_flutter_libs
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
+  AudioplayersDarwinPlugin.register(with: registry.registrar(forPlugin: "AudioplayersDarwinPlugin"))
   SwiftBonsoirPlugin.register(with: registry.registrar(forPlugin: "SwiftBonsoirPlugin"))
+  FileSelectorPlugin.register(with: registry.registrar(forPlugin: "FileSelectorPlugin"))
+  MobileScannerPlugin.register(with: registry.registrar(forPlugin: "MobileScannerPlugin"))
+  Sqlite3FlutterLibsPlugin.register(with: registry.registrar(forPlugin: "Sqlite3FlutterLibsPlugin"))
 }
diff --git a/apps/app/pubspec.lock b/apps/app/pubspec.lock
index 2e41c6b..af01178 100644
--- a/apps/app/pubspec.lock
+++ b/apps/app/pubspec.lock
@@ -1,6 +1,14 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
+  args:
+    dependency: transitive
+    description:
+      name: args
+      sha256: d0481093c50b1da8910eb0bb301626d4d8eb7284aa739614d2b394ee09e3ea04
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.7.0"
   async:
     dependency: transitive
     description:
@@ -9,38 +17,110 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.13.0"
+  audioplayers:
+    dependency: "direct main"
+    description:
+      name: audioplayers
+      sha256: "5441fa0ceb8807a5ad701199806510e56afde2b4913d9d17c2f19f2902cf0ae4"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.5.1"
+  audioplayers_android:
+    dependency: transitive
+    description:
+      name: audioplayers_android
+      sha256: "60a6728277228413a85755bd3ffd6fab98f6555608923813ce383b190a360605"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.2.1"
+  audioplayers_darwin:
+    dependency: transitive
+    description:
+      name: audioplayers_darwin
+      sha256: "0811d6924904ca13f9ef90d19081e4a87f7297ddc19fc3d31f60af1aaafee333"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.3.0"
+  audioplayers_linux:
+    dependency: transitive
+    description:
+      name: audioplayers_linux
+      sha256: f75bce1ce864170ef5e6a2c6a61cd3339e1a17ce11e99a25bae4474ea491d001
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.2.1"
+  audioplayers_platform_interface:
+    dependency: transitive
+    description:
+      name: audioplayers_platform_interface
+      sha256: "0e2f6a919ab56d0fec272e801abc07b26ae7f31980f912f24af4748763e5a656"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.1.1"
+  audioplayers_web:
+    dependency: transitive
+    description:
+      name: audioplayers_web
+      sha256: "1c0f17cec68455556775f1e50ca85c40c05c714a99c5eb1d2d57cc17ba5522d7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.1.1"
+  audioplayers_windows:
+    dependency: transitive
+    description:
+      name: audioplayers_windows
+      sha256: "4048797865105b26d47628e6abb49231ea5de84884160229251f37dfcbe52fd7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.2.1"
   bonsoir:
     dependency: transitive
     description:
       name: bonsoir
-      sha256: d5b0cb2d38ac8b0057990e3046ef0e4552b63f6d636284c7e57ac2b257e2000a
+      sha256: "15de9d734708ccce1484ea9bbc750e364af88cb30fe6392368dc0cf233ddee5e"
       url: "https://pub.dev"
     source: hosted
-    version: "2.2.0+1"
+    version: "6.0.1"
   bonsoir_android:
     dependency: transitive
     description:
       name: bonsoir_android
-      sha256: "21c38f707df0755b5bedd05c5fd52cb5e9fa9f4a4efbcef94cb9669029c73d75"
+      sha256: e19728f94a0d9813abf9e2edf644fede008e58ef539865a1be86ac5d8994154e
       url: "https://pub.dev"
     source: hosted
-    version: "2.2.0"
+    version: "6.0.1"
   bonsoir_darwin:
     dependency: transitive
     description:
       name: bonsoir_darwin
-      sha256: fe36cb2acec37c175213364a91ae1b2866a47e061f18b11322ac8e0ca39d5e61
+      sha256: e242a03a019fd474be657715826cfc13e43d02c88e46ec5611a20b9d4f72854d
       url: "https://pub.dev"
     source: hosted
-    version: "2.2.0+1"
+    version: "6.0.1"
+  bonsoir_linux:
+    dependency: transitive
+    description:
+      name: bonsoir_linux
+      sha256: "5f40f8fa6dc79245ddde38f4440bc0f49cd25ee6be04a4e56fe9fca0d2be7998"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.0.1"
   bonsoir_platform_interface:
     dependency: transitive
     description:
       name: bonsoir_platform_interface
-      sha256: "97081d861ff2e7b45edd9e17ae1b35530d5a7ec561e3377e00da2e0cfae500dc"
+      sha256: "3fa0c46b30eb2a2f48be6fa53591a5c0425bf00520be761b61763e58b51814ff"
       url: "https://pub.dev"
     source: hosted
-    version: "2.2.0"
+    version: "6.0.1"
+  bonsoir_windows:
+    dependency: transitive
+    description:
+      name: bonsoir_windows
+      sha256: "34c54802baaa2f00e3c4ab7ea46888f2a829876753778e2f40e3f273c3382d34"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.0.1"
   boolean_selector:
     dependency: transitive
     description:
@@ -73,6 +153,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.19.1"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      sha256: b30acd5944035672bc15c6b7a8b47d773e41e2f17de064350988c5d02adb1c68
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.2"
+  cross_file:
+    dependency: transitive
+    description:
+      name: cross_file
+      sha256: "701dcfc06da0882883a2657c445103380e53e647060ad8d9dfb710c100996608"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.3.5+1"
   crypto:
     dependency: transitive
     description:
@@ -81,6 +177,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.0.7"
+  dbus:
+    dependency: transitive
+    description:
+      name: dbus
+      sha256: "79e0c23480ff85dc68de79e2cd6334add97e48f7f4865d17686dd6ea81a47e8c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.11"
+  drift:
+    dependency: transitive
+    description:
+      name: drift
+      sha256: "83290a32ae006a7535c5ecf300722cb77177250d9df4ee2becc5fa8a36095114"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.29.0"
   equatable:
     dependency: transitive
     description:
@@ -97,6 +209,62 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.3.3"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      sha256: "289279317b4b16eb2bb7e271abccd4bf84ec9bdcbe999e278a94b804f5630418"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.4"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: a3b4f84adafef897088c160faf7dfffb7696046cb13ae90b508c2cbc95d3b8d4
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.1"
+  file_picker:
+    dependency: transitive
+    description:
+      name: file_picker
+      sha256: "1bbf65dd997458a08b531042ec3794112a6c39c07c37ff22113d2e7e4f81d4e4"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.2.1"
+  file_selector_linux:
+    dependency: transitive
+    description:
+      name: file_selector_linux
+      sha256: "2567f398e06ac72dcf2e98a0c95df2a9edd03c2c2e0cacd4780f20cdf56263a0"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.4"
+  file_selector_macos:
+    dependency: transitive
+    description:
+      name: file_selector_macos
+      sha256: "5e0bbe9c312416f1787a68259ea1505b52f258c587f12920422671807c4d618a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.5"
+  file_selector_platform_interface:
+    dependency: transitive
+    description:
+      name: file_selector_platform_interface
+      sha256: "35e0bd61ebcdb91a3505813b055b09b79dfdc7d0aee9c09a7ba59ae4bb13dc85"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.7.0"
+  file_selector_windows:
+    dependency: transitive
+    description:
+      name: file_selector_windows
+      sha256: "62197474ae75893a62df75939c777763d39c2bc5f73ce5b88497208bc269abfd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.3+5"
   fixnum:
     dependency: transitive
     description:
@@ -118,11 +286,104 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "5.0.0"
+  flutter_plugin_android_lifecycle:
+    dependency: transitive
+    description:
+      name: flutter_plugin_android_lifecycle
+      sha256: ee8068e0e1cd16c4a82714119918efdeed33b3ba7772c54b5d094ab53f9b7fd1
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.33"
   flutter_test:
     dependency: "direct dev"
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_web_plugins:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  http:
+    dependency: transitive
+    description:
+      name: http
+      sha256: "87721a4a50b19c7f1d49001e51409bddc46303966ce89a65af4f4e6004896412"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.6.0"
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      sha256: "178d74305e7866013777bab2c3d8726205dc5a4dd935297175b19a23a2e66571"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.1.2"
+  image_picker:
+    dependency: transitive
+    description:
+      name: image_picker
+      sha256: "784210112be18ea55f69d7076e2c656a4e24949fa9e76429fe53af0c0f4fa320"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.1"
+  image_picker_android:
+    dependency: transitive
+    description:
+      name: image_picker_android
+      sha256: "5e9bf126c37c117cf8094215373c6d561117a3cfb50ebc5add1a61dc6e224677"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.8.13+10"
+  image_picker_for_web:
+    dependency: transitive
+    description:
+      name: image_picker_for_web
+      sha256: "66257a3191ab360d23a55c8241c91a6e329d31e94efa7be9cf7a212e65850214"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.1"
+  image_picker_ios:
+    dependency: transitive
+    description:
+      name: image_picker_ios
+      sha256: "997d100ce1dda5b1ba4085194c5e36c9f8a1fb7987f6a36ab677a344cd2dc986"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.8.13+2"
+  image_picker_linux:
+    dependency: transitive
+    description:
+      name: image_picker_linux
+      sha256: "1f81c5f2046b9ab724f85523e4af65be1d47b038160a8c8deed909762c308ed4"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.2"
+  image_picker_macos:
+    dependency: transitive
+    description:
+      name: image_picker_macos
+      sha256: "86f0f15a309de7e1a552c12df9ce5b59fe927e71385329355aec4776c6a8ec91"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.2+1"
+  image_picker_platform_interface:
+    dependency: transitive
+    description:
+      name: image_picker_platform_interface
+      sha256: "567e056716333a1647c64bb6bd873cff7622233a5c3f694be28a583d4715690c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.11.1"
+  image_picker_windows:
+    dependency: transitive
+    description:
+      name: image_picker_windows
+      sha256: d248c86554a72b5495a31c56f060cf73a41c7ff541689327b1a7dbccc33adfae
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.2"
   leak_tracker:
     dependency: transitive
     description:
@@ -179,6 +440,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.16.0"
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      sha256: "41a20518f0cb1256669420fdba0cd90d21561e560ac240f26ef8322e45bb7ed6"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.0"
+  mobile_scanner:
+    dependency: "direct main"
+    description:
+      name: mobile_scanner
+      sha256: d234581c090526676fd8fab4ada92f35c6746e3fb4f05a399665d75a399fb760
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.2.3"
+  objective_c:
+    dependency: transitive
+    description:
+      name: objective_c
+      sha256: "1f81ed9e41909d44162d7ec8663b2c647c202317cc0b56d3d56f6a13146a0b64"
+      url: "https://pub.dev"
+    source: hosted
+    version: "9.1.0"
   path:
     dependency: transitive
     description:
@@ -187,6 +472,118 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.9.1"
+  path_provider:
+    dependency: transitive
+    description:
+      name: path_provider
+      sha256: "50c5dd5b6e1aaf6fb3a78b33f6aa3afca52bf903a8a5298f53101fdaee55bbcd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.5"
+  path_provider_android:
+    dependency: transitive
+    description:
+      name: path_provider_android
+      sha256: f2c65e21139ce2c3dad46922be8272bb5963516045659e71bb16e151c93b580e
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.22"
+  path_provider_foundation:
+    dependency: transitive
+    description:
+      name: path_provider_foundation
+      sha256: "6192e477f34018ef1ea790c56fffc7302e3bc3efede9e798b934c252c8c105ba"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.5.0"
+  path_provider_linux:
+    dependency: transitive
+    description:
+      name: path_provider_linux
+      sha256: f7a1fe3a634fe7734c8d3f2766ad746ae2a2884abe22e241a8b301bf5cac3279
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.1"
+  path_provider_platform_interface:
+    dependency: transitive
+    description:
+      name: path_provider_platform_interface
+      sha256: "88f5779f72ba699763fa3a3b06aa4bf6de76c8e5de842cf6f29e2e06476c2334"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  path_provider_windows:
+    dependency: transitive
+    description:
+      name: path_provider_windows
+      sha256: bd6f00dbd873bfb70d0761682da2b3a2c2fccc2b9e84c495821639601d81afe7
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.0"
+  permission_handler:
+    dependency: "direct main"
+    description:
+      name: permission_handler
+      sha256: "59adad729136f01ea9e35a48f5d1395e25cba6cea552249ddbe9cf950f5d7849"
+      url: "https://pub.dev"
+    source: hosted
+    version: "11.4.0"
+  permission_handler_android:
+    dependency: transitive
+    description:
+      name: permission_handler_android
+      sha256: d3971dcdd76182a0c198c096b5db2f0884b0d4196723d21a866fc4cdea057ebc
+      url: "https://pub.dev"
+    source: hosted
+    version: "12.1.0"
+  permission_handler_apple:
+    dependency: transitive
+    description:
+      name: permission_handler_apple
+      sha256: f000131e755c54cf4d84a5d8bd6e4149e262cc31c5a8b1d698de1ac85fa41023
+      url: "https://pub.dev"
+    source: hosted
+    version: "9.4.7"
+  permission_handler_html:
+    dependency: transitive
+    description:
+      name: permission_handler_html
+      sha256: "38f000e83355abb3392140f6bc3030660cfaef189e1f87824facb76300b4ff24"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.3+5"
+  permission_handler_platform_interface:
+    dependency: transitive
+    description:
+      name: permission_handler_platform_interface
+      sha256: eb99b295153abce5d683cac8c02e22faab63e50679b937fa1bf67d58bb282878
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.3.0"
+  permission_handler_windows:
+    dependency: transitive
+    description:
+      name: permission_handler_windows
+      sha256: "1a790728016f79a41216d88672dbc5df30e686e811ad4e698bfc51f76ad91f1e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.1"
+  petitparser:
+    dependency: transitive
+    description:
+      name: petitparser
+      sha256: "1a97266a94f7350d30ae522c0af07890c70b8e62c71e8e3920d1db4d23c057d1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.1"
+  platform:
+    dependency: transitive
+    description:
+      name: platform
+      sha256: "5d6b1b0036a5f331ebc77c850ebc8506cbc1e9416c27e59b439f917a902a4984"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.6"
   playwith_core:
     dependency: "direct main"
     description:
@@ -209,6 +606,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.8"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      sha256: "5bfcf68ca79ef689f8990d1160781b4bad40a3bd5e5218ad4076ddb7f4081585"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.0"
+  qr:
+    dependency: transitive
+    description:
+      name: qr
+      sha256: "5a1d2586170e172b8a8c8470bbbffd5eb0cd38a66c0d77155ea138d3af3a4445"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.2"
+  qr_flutter:
+    dependency: "direct main"
+    description:
+      name: qr_flutter
+      sha256: "5095f0fc6e3f71d08adef8feccc8cea4f12eec18a2e31c2e8d82cb6019f4b097"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.1.0"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -222,6 +643,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.10.1"
+  sqlite3:
+    dependency: transitive
+    description:
+      name: sqlite3
+      sha256: "3145bd74dcdb4fd6f5c6dda4d4e4490a8087d7f286a14dee5d37087290f0f8a2"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.9.4"
+  sqlite3_flutter_libs:
+    dependency: transitive
+    description:
+      name: sqlite3_flutter_libs
+      sha256: "69c80d812ef2500202ebd22002cbfc1b6565e9ff56b2f971e757fac5d42294df"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.5.40"
   stack_trace:
     dependency: transitive
     description:
@@ -246,6 +683,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.1"
+  synchronized:
+    dependency: transitive
+    description:
+      name: synchronized
+      sha256: c254ade258ec8282947a0acbbc90b9575b4f19673533ee46f2f6e9b3aeefd7c0
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.4.0"
   term_glyph:
     dependency: transitive
     description:
@@ -294,6 +739,38 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "15.0.2"
+  web:
+    dependency: transitive
+    description:
+      name: web
+      sha256: "868d88a33d8a87b18ffc05f9f030ba328ffefba92d6c127917a2ba740f9cfe4a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
+  win32:
+    dependency: transitive
+    description:
+      name: win32
+      sha256: d7cb55e04cd34096cd3a79b3330245f54cb96a370a1c27adb3c84b917de8b08e
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.15.0"
+  xdg_directories:
+    dependency: transitive
+    description:
+      name: xdg_directories
+      sha256: "7a3f37b05d989967cdddcbb571f1ea834867ae2faa29725fd085180e0883aa15"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
+  xml:
+    dependency: transitive
+    description:
+      name: xml
+      sha256: "971043b3a0d3da28727e40ed3e0b5d18b742fa5a68665cca88e74b7876d5e025"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.6.1"
 sdks:
   dart: ">=3.9.2 <4.0.0"
-  flutter: ">=3.18.0-18.0.pre.54"
+  flutter: ">=3.35.0"
diff --git a/apps/app/pubspec.yaml b/apps/app/pubspec.yaml
index 62795d3..ca3020e 100644
--- a/apps/app/pubspec.yaml
+++ b/apps/app/pubspec.yaml
@@ -35,6 +35,11 @@ dependencies:
     path: ../../packages/core
   playwith_game_quiz:
     path: ../../packages/games/quiz
+  permission_handler: ^11.0.0
+  qr_flutter: ^4.1.0
+  mobile_scanner: ^5.1.0
+  audioplayers: ^6.0.0
+
 
 dev_dependencies:
   flutter_test:
@@ -52,39 +57,6 @@ dev_dependencies:
 
 # The following section is specific to Flutter packages.
 flutter:
-
-  # The following line ensures that the Material Icons font is
-  # included with your application, so that you can use the icons in
-  # the material Icons class.
   uses-material-design: true
-
-  # To add assets to your application, add an assets section, like this:
-  # assets:
-  #   - images/a_dot_burr.jpeg
-  #   - images/a_dot_ham.jpeg
-
-  # An image asset can refer to one or more resolution-specific "variants", see
-  # https://flutter.dev/to/resolution-aware-images
-
-  # For details regarding adding assets from package dependencies, see
-  # https://flutter.dev/to/asset-from-package
-
-  # To add custom fonts to your application, add a fonts section here,
-  # in this "flutter" section. Each entry in this list should have a
-  # "family" key with the font family name, and a "fonts" key with a
-  # list giving the asset and other descriptors for the font. For
-  # example:
-  # fonts:
-  #   - family: Schyler
-  #     fonts:
-  #       - asset: fonts/Schyler-Regular.ttf
-  #       - asset: fonts/Schyler-Italic.ttf
-  #         style: italic
-  #   - family: Trajan Pro
-  #     fonts:
-  #       - asset: fonts/TrajanPro.ttf
-  #       - asset: fonts/TrajanPro_Bold.ttf
-  #         weight: 700
-  #
-  # For details regarding fonts from package dependencies,
-  # see https://flutter.dev/to/font-from-package
+  assets:
+    - assets/audio/
\ No newline at end of file
diff --git a/apps/app/windows/flutter/generated_plugin_registrant.cc b/apps/app/windows/flutter/generated_plugin_registrant.cc
index 8b6d468..ede831a 100644
--- a/apps/app/windows/flutter/generated_plugin_registrant.cc
+++ b/apps/app/windows/flutter/generated_plugin_registrant.cc
@@ -6,6 +6,21 @@
 
 #include "generated_plugin_registrant.h"
 
+#include <audioplayers_windows/audioplayers_windows_plugin.h>
+#include <bonsoir_windows/bonsoir_windows_plugin_c_api.h>
+#include <file_selector_windows/file_selector_windows.h>
+#include <permission_handler_windows/permission_handler_windows_plugin.h>
+#include <sqlite3_flutter_libs/sqlite3_flutter_libs_plugin.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
+  AudioplayersWindowsPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("AudioplayersWindowsPlugin"));
+  BonsoirWindowsPluginCApiRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("BonsoirWindowsPluginCApi"));
+  FileSelectorWindowsRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("FileSelectorWindows"));
+  PermissionHandlerWindowsPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("PermissionHandlerWindowsPlugin"));
+  Sqlite3FlutterLibsPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("Sqlite3FlutterLibsPlugin"));
 }
diff --git a/apps/app/windows/flutter/generated_plugins.cmake b/apps/app/windows/flutter/generated_plugins.cmake
index b93c4c3..2935c24 100644
--- a/apps/app/windows/flutter/generated_plugins.cmake
+++ b/apps/app/windows/flutter/generated_plugins.cmake
@@ -3,6 +3,11 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
+  audioplayers_windows
+  bonsoir_windows
+  file_selector_windows
+  permission_handler_windows
+  sqlite3_flutter_libs
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST
diff --git a/packages/core/lib/database/ephemeral_database.dart b/packages/core/lib/database/ephemeral_database.dart
new file mode 100644
index 0000000..e58cb89
--- /dev/null
+++ b/packages/core/lib/database/ephemeral_database.dart
@@ -0,0 +1,47 @@
+import 'dart:io';
+import 'package:drift/drift.dart';
+import 'package:drift/native.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:path/path.dart' as p;
+
+part 'ephemeral_database.g.dart'; // (나중에 생성될 파일)
+
+// 테이블 정의: 미디어 메타데이터
+class MediaItems extends Table {
+  TextColumn get id => text()(); // UUID
+  TextColumn get senderId => text()();
+  TextColumn get senderName => text()();
+  TextColumn get type => text()(); // 'IMAGE', 'VIDEO', 'AUDIO'
+  TextColumn get filePath => text()(); // 로컬 저장 경로
+  DateTimeColumn get createdAt => dateTime().withDefault(currentDateAndTime)();
+  
+  @override
+  Set<Column> get primaryKey => {id};
+}
+
+@DriftDatabase(tables: [MediaItems])
+class EphemeralDatabase extends _$EphemeralDatabase {
+  // 싱글톤이 아닌 인스턴스로 관리 (방 만들 때 생성, 나갈 때 close)
+  EphemeralDatabase(QueryExecutor e) : super(e);
+
+  @override
+  int get schemaVersion => 1;
+
+  // 팩토리: 파일 기반 DB 생성
+  static Future<EphemeralDatabase> create(String roomName) async {
+    final dbFolder = await getApplicationDocumentsDirectory();
+    // 방 이름이나 ID로 파일명 구분
+    final file = File(p.join(dbFolder.path, 'room_$roomName.sqlite'));
+    return EphemeralDatabase(NativeDatabase(file));
+  }
+
+  // CRUD 쿼리
+  Future<List<MediaItem>> getAllMedia() => select(mediaItems).get();
+  Future<int> insertMedia(MediaItemsCompanion entry) => into(mediaItems).insert(entry);
+  
+  // [핵심] 방 폭파 시 데이터 삭제
+  Future<void> wipeData() async {
+    await close(); // DB 연결 종료
+    // 실제 파일 삭제 로직은 Manager에서 수행 (DB 파일 자체를 날림)
+  }
+}
\ No newline at end of file
diff --git a/packages/core/lib/database/ephemeral_database.g.dart b/packages/core/lib/database/ephemeral_database.g.dart
new file mode 100644
index 0000000..dd6ccb7
--- /dev/null
+++ b/packages/core/lib/database/ephemeral_database.g.dart
@@ -0,0 +1,557 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'ephemeral_database.dart';
+
+// ignore_for_file: type=lint
+class $MediaItemsTable extends MediaItems
+    with TableInfo<$MediaItemsTable, MediaItem> {
+  @override
+  final GeneratedDatabase attachedDatabase;
+  final String? _alias;
+  $MediaItemsTable(this.attachedDatabase, [this._alias]);
+  static const VerificationMeta _idMeta = const VerificationMeta('id');
+  @override
+  late final GeneratedColumn<String> id = GeneratedColumn<String>(
+      'id', aliasedName, false,
+      type: DriftSqlType.string, requiredDuringInsert: true);
+  static const VerificationMeta _senderIdMeta =
+      const VerificationMeta('senderId');
+  @override
+  late final GeneratedColumn<String> senderId = GeneratedColumn<String>(
+      'sender_id', aliasedName, false,
+      type: DriftSqlType.string, requiredDuringInsert: true);
+  static const VerificationMeta _senderNameMeta =
+      const VerificationMeta('senderName');
+  @override
+  late final GeneratedColumn<String> senderName = GeneratedColumn<String>(
+      'sender_name', aliasedName, false,
+      type: DriftSqlType.string, requiredDuringInsert: true);
+  static const VerificationMeta _typeMeta = const VerificationMeta('type');
+  @override
+  late final GeneratedColumn<String> type = GeneratedColumn<String>(
+      'type', aliasedName, false,
+      type: DriftSqlType.string, requiredDuringInsert: true);
+  static const VerificationMeta _filePathMeta =
+      const VerificationMeta('filePath');
+  @override
+  late final GeneratedColumn<String> filePath = GeneratedColumn<String>(
+      'file_path', aliasedName, false,
+      type: DriftSqlType.string, requiredDuringInsert: true);
+  static const VerificationMeta _createdAtMeta =
+      const VerificationMeta('createdAt');
+  @override
+  late final GeneratedColumn<DateTime> createdAt = GeneratedColumn<DateTime>(
+      'created_at', aliasedName, false,
+      type: DriftSqlType.dateTime,
+      requiredDuringInsert: false,
+      defaultValue: currentDateAndTime);
+  @override
+  List<GeneratedColumn> get $columns =>
+      [id, senderId, senderName, type, filePath, createdAt];
+  @override
+  String get aliasedName => _alias ?? actualTableName;
+  @override
+  String get actualTableName => $name;
+  static const String $name = 'media_items';
+  @override
+  VerificationContext validateIntegrity(Insertable<MediaItem> instance,
+      {bool isInserting = false}) {
+    final context = VerificationContext();
+    final data = instance.toColumns(true);
+    if (data.containsKey('id')) {
+      context.handle(_idMeta, id.isAcceptableOrUnknown(data['id']!, _idMeta));
+    } else if (isInserting) {
+      context.missing(_idMeta);
+    }
+    if (data.containsKey('sender_id')) {
+      context.handle(_senderIdMeta,
+          senderId.isAcceptableOrUnknown(data['sender_id']!, _senderIdMeta));
+    } else if (isInserting) {
+      context.missing(_senderIdMeta);
+    }
+    if (data.containsKey('sender_name')) {
+      context.handle(
+          _senderNameMeta,
+          senderName.isAcceptableOrUnknown(
+              data['sender_name']!, _senderNameMeta));
+    } else if (isInserting) {
+      context.missing(_senderNameMeta);
+    }
+    if (data.containsKey('type')) {
+      context.handle(
+          _typeMeta, type.isAcceptableOrUnknown(data['type']!, _typeMeta));
+    } else if (isInserting) {
+      context.missing(_typeMeta);
+    }
+    if (data.containsKey('file_path')) {
+      context.handle(_filePathMeta,
+          filePath.isAcceptableOrUnknown(data['file_path']!, _filePathMeta));
+    } else if (isInserting) {
+      context.missing(_filePathMeta);
+    }
+    if (data.containsKey('created_at')) {
+      context.handle(_createdAtMeta,
+          createdAt.isAcceptableOrUnknown(data['created_at']!, _createdAtMeta));
+    }
+    return context;
+  }
+
+  @override
+  Set<GeneratedColumn> get $primaryKey => {id};
+  @override
+  MediaItem map(Map<String, dynamic> data, {String? tablePrefix}) {
+    final effectivePrefix = tablePrefix != null ? '$tablePrefix.' : '';
+    return MediaItem(
+      id: attachedDatabase.typeMapping
+          .read(DriftSqlType.string, data['${effectivePrefix}id'])!,
+      senderId: attachedDatabase.typeMapping
+          .read(DriftSqlType.string, data['${effectivePrefix}sender_id'])!,
+      senderName: attachedDatabase.typeMapping
+          .read(DriftSqlType.string, data['${effectivePrefix}sender_name'])!,
+      type: attachedDatabase.typeMapping
+          .read(DriftSqlType.string, data['${effectivePrefix}type'])!,
+      filePath: attachedDatabase.typeMapping
+          .read(DriftSqlType.string, data['${effectivePrefix}file_path'])!,
+      createdAt: attachedDatabase.typeMapping
+          .read(DriftSqlType.dateTime, data['${effectivePrefix}created_at'])!,
+    );
+  }
+
+  @override
+  $MediaItemsTable createAlias(String alias) {
+    return $MediaItemsTable(attachedDatabase, alias);
+  }
+}
+
+class MediaItem extends DataClass implements Insertable<MediaItem> {
+  final String id;
+  final String senderId;
+  final String senderName;
+  final String type;
+  final String filePath;
+  final DateTime createdAt;
+  const MediaItem(
+      {required this.id,
+      required this.senderId,
+      required this.senderName,
+      required this.type,
+      required this.filePath,
+      required this.createdAt});
+  @override
+  Map<String, Expression> toColumns(bool nullToAbsent) {
+    final map = <String, Expression>{};
+    map['id'] = Variable<String>(id);
+    map['sender_id'] = Variable<String>(senderId);
+    map['sender_name'] = Variable<String>(senderName);
+    map['type'] = Variable<String>(type);
+    map['file_path'] = Variable<String>(filePath);
+    map['created_at'] = Variable<DateTime>(createdAt);
+    return map;
+  }
+
+  MediaItemsCompanion toCompanion(bool nullToAbsent) {
+    return MediaItemsCompanion(
+      id: Value(id),
+      senderId: Value(senderId),
+      senderName: Value(senderName),
+      type: Value(type),
+      filePath: Value(filePath),
+      createdAt: Value(createdAt),
+    );
+  }
+
+  factory MediaItem.fromJson(Map<String, dynamic> json,
+      {ValueSerializer? serializer}) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return MediaItem(
+      id: serializer.fromJson<String>(json['id']),
+      senderId: serializer.fromJson<String>(json['senderId']),
+      senderName: serializer.fromJson<String>(json['senderName']),
+      type: serializer.fromJson<String>(json['type']),
+      filePath: serializer.fromJson<String>(json['filePath']),
+      createdAt: serializer.fromJson<DateTime>(json['createdAt']),
+    );
+  }
+  @override
+  Map<String, dynamic> toJson({ValueSerializer? serializer}) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return <String, dynamic>{
+      'id': serializer.toJson<String>(id),
+      'senderId': serializer.toJson<String>(senderId),
+      'senderName': serializer.toJson<String>(senderName),
+      'type': serializer.toJson<String>(type),
+      'filePath': serializer.toJson<String>(filePath),
+      'createdAt': serializer.toJson<DateTime>(createdAt),
+    };
+  }
+
+  MediaItem copyWith(
+          {String? id,
+          String? senderId,
+          String? senderName,
+          String? type,
+          String? filePath,
+          DateTime? createdAt}) =>
+      MediaItem(
+        id: id ?? this.id,
+        senderId: senderId ?? this.senderId,
+        senderName: senderName ?? this.senderName,
+        type: type ?? this.type,
+        filePath: filePath ?? this.filePath,
+        createdAt: createdAt ?? this.createdAt,
+      );
+  MediaItem copyWithCompanion(MediaItemsCompanion data) {
+    return MediaItem(
+      id: data.id.present ? data.id.value : this.id,
+      senderId: data.senderId.present ? data.senderId.value : this.senderId,
+      senderName:
+          data.senderName.present ? data.senderName.value : this.senderName,
+      type: data.type.present ? data.type.value : this.type,
+      filePath: data.filePath.present ? data.filePath.value : this.filePath,
+      createdAt: data.createdAt.present ? data.createdAt.value : this.createdAt,
+    );
+  }
+
+  @override
+  String toString() {
+    return (StringBuffer('MediaItem(')
+          ..write('id: $id, ')
+          ..write('senderId: $senderId, ')
+          ..write('senderName: $senderName, ')
+          ..write('type: $type, ')
+          ..write('filePath: $filePath, ')
+          ..write('createdAt: $createdAt')
+          ..write(')'))
+        .toString();
+  }
+
+  @override
+  int get hashCode =>
+      Object.hash(id, senderId, senderName, type, filePath, createdAt);
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      (other is MediaItem &&
+          other.id == this.id &&
+          other.senderId == this.senderId &&
+          other.senderName == this.senderName &&
+          other.type == this.type &&
+          other.filePath == this.filePath &&
+          other.createdAt == this.createdAt);
+}
+
+class MediaItemsCompanion extends UpdateCompanion<MediaItem> {
+  final Value<String> id;
+  final Value<String> senderId;
+  final Value<String> senderName;
+  final Value<String> type;
+  final Value<String> filePath;
+  final Value<DateTime> createdAt;
+  final Value<int> rowid;
+  const MediaItemsCompanion({
+    this.id = const Value.absent(),
+    this.senderId = const Value.absent(),
+    this.senderName = const Value.absent(),
+    this.type = const Value.absent(),
+    this.filePath = const Value.absent(),
+    this.createdAt = const Value.absent(),
+    this.rowid = const Value.absent(),
+  });
+  MediaItemsCompanion.insert({
+    required String id,
+    required String senderId,
+    required String senderName,
+    required String type,
+    required String filePath,
+    this.createdAt = const Value.absent(),
+    this.rowid = const Value.absent(),
+  })  : id = Value(id),
+        senderId = Value(senderId),
+        senderName = Value(senderName),
+        type = Value(type),
+        filePath = Value(filePath);
+  static Insertable<MediaItem> custom({
+    Expression<String>? id,
+    Expression<String>? senderId,
+    Expression<String>? senderName,
+    Expression<String>? type,
+    Expression<String>? filePath,
+    Expression<DateTime>? createdAt,
+    Expression<int>? rowid,
+  }) {
+    return RawValuesInsertable({
+      if (id != null) 'id': id,
+      if (senderId != null) 'sender_id': senderId,
+      if (senderName != null) 'sender_name': senderName,
+      if (type != null) 'type': type,
+      if (filePath != null) 'file_path': filePath,
+      if (createdAt != null) 'created_at': createdAt,
+      if (rowid != null) 'rowid': rowid,
+    });
+  }
+
+  MediaItemsCompanion copyWith(
+      {Value<String>? id,
+      Value<String>? senderId,
+      Value<String>? senderName,
+      Value<String>? type,
+      Value<String>? filePath,
+      Value<DateTime>? createdAt,
+      Value<int>? rowid}) {
+    return MediaItemsCompanion(
+      id: id ?? this.id,
+      senderId: senderId ?? this.senderId,
+      senderName: senderName ?? this.senderName,
+      type: type ?? this.type,
+      filePath: filePath ?? this.filePath,
+      createdAt: createdAt ?? this.createdAt,
+      rowid: rowid ?? this.rowid,
+    );
+  }
+
+  @override
+  Map<String, Expression> toColumns(bool nullToAbsent) {
+    final map = <String, Expression>{};
+    if (id.present) {
+      map['id'] = Variable<String>(id.value);
+    }
+    if (senderId.present) {
+      map['sender_id'] = Variable<String>(senderId.value);
+    }
+    if (senderName.present) {
+      map['sender_name'] = Variable<String>(senderName.value);
+    }
+    if (type.present) {
+      map['type'] = Variable<String>(type.value);
+    }
+    if (filePath.present) {
+      map['file_path'] = Variable<String>(filePath.value);
+    }
+    if (createdAt.present) {
+      map['created_at'] = Variable<DateTime>(createdAt.value);
+    }
+    if (rowid.present) {
+      map['rowid'] = Variable<int>(rowid.value);
+    }
+    return map;
+  }
+
+  @override
+  String toString() {
+    return (StringBuffer('MediaItemsCompanion(')
+          ..write('id: $id, ')
+          ..write('senderId: $senderId, ')
+          ..write('senderName: $senderName, ')
+          ..write('type: $type, ')
+          ..write('filePath: $filePath, ')
+          ..write('createdAt: $createdAt, ')
+          ..write('rowid: $rowid')
+          ..write(')'))
+        .toString();
+  }
+}
+
+abstract class _$EphemeralDatabase extends GeneratedDatabase {
+  _$EphemeralDatabase(QueryExecutor e) : super(e);
+  $EphemeralDatabaseManager get managers => $EphemeralDatabaseManager(this);
+  late final $MediaItemsTable mediaItems = $MediaItemsTable(this);
+  @override
+  Iterable<TableInfo<Table, Object?>> get allTables =>
+      allSchemaEntities.whereType<TableInfo<Table, Object?>>();
+  @override
+  List<DatabaseSchemaEntity> get allSchemaEntities => [mediaItems];
+}
+
+typedef $$MediaItemsTableCreateCompanionBuilder = MediaItemsCompanion Function({
+  required String id,
+  required String senderId,
+  required String senderName,
+  required String type,
+  required String filePath,
+  Value<DateTime> createdAt,
+  Value<int> rowid,
+});
+typedef $$MediaItemsTableUpdateCompanionBuilder = MediaItemsCompanion Function({
+  Value<String> id,
+  Value<String> senderId,
+  Value<String> senderName,
+  Value<String> type,
+  Value<String> filePath,
+  Value<DateTime> createdAt,
+  Value<int> rowid,
+});
+
+class $$MediaItemsTableFilterComposer
+    extends Composer<_$EphemeralDatabase, $MediaItemsTable> {
+  $$MediaItemsTableFilterComposer({
+    required super.$db,
+    required super.$table,
+    super.joinBuilder,
+    super.$addJoinBuilderToRootComposer,
+    super.$removeJoinBuilderFromRootComposer,
+  });
+  ColumnFilters<String> get id => $composableBuilder(
+      column: $table.id, builder: (column) => ColumnFilters(column));
+
+  ColumnFilters<String> get senderId => $composableBuilder(
+      column: $table.senderId, builder: (column) => ColumnFilters(column));
+
+  ColumnFilters<String> get senderName => $composableBuilder(
+      column: $table.senderName, builder: (column) => ColumnFilters(column));
+
+  ColumnFilters<String> get type => $composableBuilder(
+      column: $table.type, builder: (column) => ColumnFilters(column));
+
+  ColumnFilters<String> get filePath => $composableBuilder(
+      column: $table.filePath, builder: (column) => ColumnFilters(column));
+
+  ColumnFilters<DateTime> get createdAt => $composableBuilder(
+      column: $table.createdAt, builder: (column) => ColumnFilters(column));
+}
+
+class $$MediaItemsTableOrderingComposer
+    extends Composer<_$EphemeralDatabase, $MediaItemsTable> {
+  $$MediaItemsTableOrderingComposer({
+    required super.$db,
+    required super.$table,
+    super.joinBuilder,
+    super.$addJoinBuilderToRootComposer,
+    super.$removeJoinBuilderFromRootComposer,
+  });
+  ColumnOrderings<String> get id => $composableBuilder(
+      column: $table.id, builder: (column) => ColumnOrderings(column));
+
+  ColumnOrderings<String> get senderId => $composableBuilder(
+      column: $table.senderId, builder: (column) => ColumnOrderings(column));
+
+  ColumnOrderings<String> get senderName => $composableBuilder(
+      column: $table.senderName, builder: (column) => ColumnOrderings(column));
+
+  ColumnOrderings<String> get type => $composableBuilder(
+      column: $table.type, builder: (column) => ColumnOrderings(column));
+
+  ColumnOrderings<String> get filePath => $composableBuilder(
+      column: $table.filePath, builder: (column) => ColumnOrderings(column));
+
+  ColumnOrderings<DateTime> get createdAt => $composableBuilder(
+      column: $table.createdAt, builder: (column) => ColumnOrderings(column));
+}
+
+class $$MediaItemsTableAnnotationComposer
+    extends Composer<_$EphemeralDatabase, $MediaItemsTable> {
+  $$MediaItemsTableAnnotationComposer({
+    required super.$db,
+    required super.$table,
+    super.joinBuilder,
+    super.$addJoinBuilderToRootComposer,
+    super.$removeJoinBuilderFromRootComposer,
+  });
+  GeneratedColumn<String> get id =>
+      $composableBuilder(column: $table.id, builder: (column) => column);
+
+  GeneratedColumn<String> get senderId =>
+      $composableBuilder(column: $table.senderId, builder: (column) => column);
+
+  GeneratedColumn<String> get senderName => $composableBuilder(
+      column: $table.senderName, builder: (column) => column);
+
+  GeneratedColumn<String> get type =>
+      $composableBuilder(column: $table.type, builder: (column) => column);
+
+  GeneratedColumn<String> get filePath =>
+      $composableBuilder(column: $table.filePath, builder: (column) => column);
+
+  GeneratedColumn<DateTime> get createdAt =>
+      $composableBuilder(column: $table.createdAt, builder: (column) => column);
+}
+
+class $$MediaItemsTableTableManager extends RootTableManager<
+    _$EphemeralDatabase,
+    $MediaItemsTable,
+    MediaItem,
+    $$MediaItemsTableFilterComposer,
+    $$MediaItemsTableOrderingComposer,
+    $$MediaItemsTableAnnotationComposer,
+    $$MediaItemsTableCreateCompanionBuilder,
+    $$MediaItemsTableUpdateCompanionBuilder,
+    (
+      MediaItem,
+      BaseReferences<_$EphemeralDatabase, $MediaItemsTable, MediaItem>
+    ),
+    MediaItem,
+    PrefetchHooks Function()> {
+  $$MediaItemsTableTableManager(_$EphemeralDatabase db, $MediaItemsTable table)
+      : super(TableManagerState(
+          db: db,
+          table: table,
+          createFilteringComposer: () =>
+              $$MediaItemsTableFilterComposer($db: db, $table: table),
+          createOrderingComposer: () =>
+              $$MediaItemsTableOrderingComposer($db: db, $table: table),
+          createComputedFieldComposer: () =>
+              $$MediaItemsTableAnnotationComposer($db: db, $table: table),
+          updateCompanionCallback: ({
+            Value<String> id = const Value.absent(),
+            Value<String> senderId = const Value.absent(),
+            Value<String> senderName = const Value.absent(),
+            Value<String> type = const Value.absent(),
+            Value<String> filePath = const Value.absent(),
+            Value<DateTime> createdAt = const Value.absent(),
+            Value<int> rowid = const Value.absent(),
+          }) =>
+              MediaItemsCompanion(
+            id: id,
+            senderId: senderId,
+            senderName: senderName,
+            type: type,
+            filePath: filePath,
+            createdAt: createdAt,
+            rowid: rowid,
+          ),
+          createCompanionCallback: ({
+            required String id,
+            required String senderId,
+            required String senderName,
+            required String type,
+            required String filePath,
+            Value<DateTime> createdAt = const Value.absent(),
+            Value<int> rowid = const Value.absent(),
+          }) =>
+              MediaItemsCompanion.insert(
+            id: id,
+            senderId: senderId,
+            senderName: senderName,
+            type: type,
+            filePath: filePath,
+            createdAt: createdAt,
+            rowid: rowid,
+          ),
+          withReferenceMapper: (p0) => p0
+              .map((e) => (e.readTable(table), BaseReferences(db, table, e)))
+              .toList(),
+          prefetchHooksCallback: null,
+        ));
+}
+
+typedef $$MediaItemsTableProcessedTableManager = ProcessedTableManager<
+    _$EphemeralDatabase,
+    $MediaItemsTable,
+    MediaItem,
+    $$MediaItemsTableFilterComposer,
+    $$MediaItemsTableOrderingComposer,
+    $$MediaItemsTableAnnotationComposer,
+    $$MediaItemsTableCreateCompanionBuilder,
+    $$MediaItemsTableUpdateCompanionBuilder,
+    (
+      MediaItem,
+      BaseReferences<_$EphemeralDatabase, $MediaItemsTable, MediaItem>
+    ),
+    MediaItem,
+    PrefetchHooks Function()>;
+
+class $EphemeralDatabaseManager {
+  final _$EphemeralDatabase _db;
+  $EphemeralDatabaseManager(this._db);
+  $$MediaItemsTableTableManager get mediaItems =>
+      $$MediaItemsTableTableManager(_db, _db.mediaItems);
+}
diff --git a/packages/core/lib/game/base_game.dart b/packages/core/lib/game/base_game.dart
index 28ef21a..36eab3a 100644
--- a/packages/core/lib/game/base_game.dart
+++ b/packages/core/lib/game/base_game.dart
@@ -1,31 +1,53 @@
-// lib/game/base_game.dart
+import 'dart:async';
 import 'package:flutter/material.dart';
+import '../network/network_manager.dart';
+import '../model/play_packet.dart';
 
-/// 모든 미니게임의 부모 클래스
+/// 모든 게임의 부모 클래스 (자동 패킷 리스닝 기능 탑재)
 abstract class BaseGame {
-  /// 게임 고유 ID (예: 'quiz', 'bomb') - 패킷 라우팅용
   String get id;
-
-  /// 게임 이름 (로비 표시용)
   String get name;
-
-  /// 게임 설명
   String get description;
 
-  /// [Host] 방장이 보는 게임 화면 빌드
-  Widget buildHostView(BuildContext context);
+  // 네트워크 구독 관리자 (private)
+  StreamSubscription? _internalSubscription;
 
-  /// [Guest] 참가자가 보는 게임 화면 빌드
-  Widget buildGuestView(BuildContext context);
+  /// [Core] 게임 시작 시 자동 호출 (super.onStart() 필수 호출)
+  @mustCallSuper
+  void onStart() {
+    print("[$name] Game Engine Started");
+    
+    // 네트워크 스트림 자동 구독
+    _internalSubscription = NetworkManager().messageStream.listen((payload) {
+      // 1. PlayPacket으로 변환 시도 (구조화된 데이터)
+      if (payload.containsKey('type') && payload.containsKey('payload')) {
+        try {
+          // 만약 패킷 타입이 'game'이라면 onGamePacketReceived 호출
+          // (여기서는 단순화를 위해 모든 JSON을 자식에게 넘기되, 자식이 알아서 필터링하게 하거나
+          //  PlayPacket 구조를 강제할 수 있습니다. 현재는 하위 호환성을 위해 raw data 전달)
+          onMessageReceived("", payload); 
+        } catch (e) {
+          print("Packet Error: $e");
+        }
+      } else {
+        // 레거시 데이터 처리
+        onMessageReceived("", payload);
+      }
+    });
+  }
 
-  /// 게임이 시작될 때 초기화 로직 (변수 초기화 등)
-  void onStart();
+  /// [Core] 게임 종료 시 자동 호출 (super.onDispose() 필수 호출)
+  @mustCallSuper
+  void onDispose() {
+    print("[$name] Game Engine Disposed");
+    _internalSubscription?.cancel();
+  }
 
-  /// 네트워크 메시지 수신 처리
-  /// [senderId]: 보낸 사람 ID
-  /// [payload]: 수신된 데이터 (JSON)
+  /// [Abstract] 자식 클래스가 구현해야 할 데이터 처리 메서드
+  /// Core가 메시지를 받으면 이 함수를 실행시켜 줍니다.
   void onMessageReceived(String senderId, Map<String, dynamic> payload);
 
-  /// 게임 종료 및 메모리 정리
-  void onDispose();
+  // UI 빌더
+  Widget buildHostView(BuildContext context);
+  Widget buildGuestView(BuildContext context);
 }
\ No newline at end of file
diff --git a/packages/core/lib/manager/global_chat_manager.dart b/packages/core/lib/manager/global_chat_manager.dart
new file mode 100644
index 0000000..6373c20
--- /dev/null
+++ b/packages/core/lib/manager/global_chat_manager.dart
@@ -0,0 +1,70 @@
+import 'dart:async';
+import '../network/network_manager.dart';
+import '../model/play_packet.dart';
+
+class ChatMessage {
+  final String senderName;
+  final String text;
+  final bool isMe;
+  final DateTime timestamp;
+  
+  ChatMessage(this.senderName, this.text, this.isMe) : timestamp = DateTime.now();
+}
+
+class GlobalChatManager {
+  static final GlobalChatManager _instance = GlobalChatManager._internal();
+  factory GlobalChatManager() => _instance;
+  GlobalChatManager._internal();
+
+  // UI가 구독할 스트림
+  final _messageController = StreamController<List<ChatMessage>>.broadcast();
+  Stream<List<ChatMessage>> get messageStream => _messageController.stream;
+
+  final List<ChatMessage> _messages = [];
+
+  /// [NetworkManager]로부터 패킷을 전달받음
+  void onPacketReceived(PlayPacket packet) {
+    if (packet.type != PacketType.chat) return;
+
+    final data = packet.payload as Map<String, dynamic>;
+    final senderName = data['senderName'];
+    final text = data['text'];
+    final isMe = packet.senderId == NetworkManager().me.id;
+
+    final chatMsg = ChatMessage(senderName, text, isMe);
+    _messages.add(chatMsg);
+    
+    // UI 갱신
+    _messageController.add(List.from(_messages));
+  }
+
+  /// 메시지 전송
+  void sendMessage(String text) {
+    if (text.trim().isEmpty) return;
+
+    final myInfo = NetworkManager().me;
+    
+    // 1. 내 화면에 즉시 추가 (나한테는 네트워크로 안 돌아오므로)
+    final myMsg = ChatMessage(myInfo.nickname, text, true);
+    _messages.add(myMsg);
+    _messageController.add(List.from(_messages));
+
+    // 2. 네트워크 전송 (PlayPacket 포장)
+    final packet = PlayPacket(
+      type: PacketType.chat,
+      senderId: myInfo.id,
+      payload: {
+        'senderName': myInfo.nickname,
+        'text': text,
+      },
+      timestamp: DateTime.now().millisecondsSinceEpoch,
+    );
+    
+    NetworkManager().sendPacket(packet);
+  }
+  
+  void clearMessages() {
+    _messages.clear();
+    _messageController.add([]);
+  }
+}
\ No newline at end of file
diff --git a/packages/core/lib/manager/media_manager.dart b/packages/core/lib/manager/media_manager.dart
new file mode 100644
index 0000000..5877feb
--- /dev/null
+++ b/packages/core/lib/manager/media_manager.dart
@@ -0,0 +1,149 @@
+import 'dart:convert';
+import 'dart:io';
+import 'dart:async';
+import 'dart:typed_data';
+
+import 'package:drift/drift.dart' as drift;
+import 'package:path_provider/path_provider.dart';
+import 'package:uuid/uuid.dart';
+
+import '../database/ephemeral_database.dart';
+import '../network/network_manager.dart';
+import '../model/play_packet.dart';
+
+class MediaManager {
+  static final MediaManager _instance = MediaManager._internal();
+  factory MediaManager() => _instance;
+  MediaManager._internal();
+
+  EphemeralDatabase? _db;
+  String? _currentRoomId;
+
+  // UI에서 갤러리 변경을 감지하기 위한 스트림 (DB 변경 시 자동 발동)
+  Stream<List<MediaItem>> get galleryStream {
+    if (_db == null) return const Stream.empty();
+    return _db!.select(_db!.mediaItems).watch(); // watch()는 데이터 변경 시 자동 업데이트됨
+  }
+
+  // ---------------------------------------------------------------------------
+  // [1] 초기화 및 정리 (Lifecycle)
+  // ---------------------------------------------------------------------------
+  
+  /// 방 생성/입장 시 호출 (DB 생성)
+  Future<void> initialize(String roomId) async {
+    // 기존 DB가 열려있다면 정리
+    await cleanup();
+    
+    _currentRoomId = roomId;
+    _db = await EphemeralDatabase.create(roomId);
+    print("[MediaManager] DB Initialized for Room: $roomId");
+  }
+
+  /// 방 나갈 때 호출 (데이터 파괴)
+  Future<void> cleanup() async {
+    if (_db != null) {
+      await _db!.close();
+      _db = null;
+    }
+    
+    // DB 파일 삭제 (흔적 지우기)
+    if (_currentRoomId != null) {
+      try {
+        final dbFolder = await getApplicationDocumentsDirectory();
+        // EphemeralDatabase.create에서 만든 파일명과 동일해야 함
+        final file = File('${dbFolder.path}/room_$_currentRoomId.sqlite');
+        
+        if (await file.exists()) {
+          await file.delete();
+          print("[MediaManager] DB File Deleted 🔥");
+        }
+      } catch (e) {
+        print("[MediaManager] Cleanup Error: $e");
+      }
+      _currentRoomId = null;
+    }
+  }
+
+  // ---------------------------------------------------------------------------
+  // [2] 미디어 전송 (Send)
+  // ---------------------------------------------------------------------------
+  Future<void> sendMedia({
+    required String filePath, 
+    required String type, // 'IMAGE', 'AUDIO'
+  }) async {
+    if (_db == null) return;
+
+    final myInfo = NetworkManager().me;
+    final mediaId = const Uuid().v4();
+    
+    // A. 내 로컬 DB에 먼저 저장 (내가 보낸 것도 보여야 하니까)
+    await _db!.insertMedia(MediaItemsCompanion(
+      id: drift.Value(mediaId),
+      senderId: drift.Value(myInfo.id),
+      senderName: drift.Value(myInfo.nickname),
+      type: drift.Value(type),
+      filePath: drift.Value(filePath),
+      createdAt: drift.Value(DateTime.now()),
+    ));
+
+    // B. 파일 읽기 및 인코딩 (MVP: Base64)
+    // 주의: 대용량 동영상은 이 방식으로 보내면 앱 멈춤. (추후 Chunk 방식 개선 필요)
+    final file = File(filePath);
+    final fileBytes = await file.readAsBytes();
+    final base64Data = base64Encode(fileBytes);
+    final fileName = filePath.split('/').last;
+
+    // C. 패킷 전송
+    final packet = PlayPacket(
+      type: PacketType.media,
+      senderId: myInfo.id,
+      payload: {
+        'id': mediaId,
+        'senderName': myInfo.nickname,
+        'type': type,
+        'data': base64Data,
+        'fileName': fileName,
+      },
+      timestamp: DateTime.now().millisecondsSinceEpoch,
+    );
+    
+    NetworkManager().sendPacket(packet);
+    print("[MediaManager] Sent media: $fileName");
+  }
+
+  // ---------------------------------------------------------------------------
+  // [3] 미디어 수신 (Receive)
+  // ---------------------------------------------------------------------------
+  Future<void> onMediaReceived(PlayPacket packet) async {
+    if (_db == null) return;
+
+    try {
+      final data = packet.payload as Map<String, dynamic>;
+      final String base64Data = data['data'];
+      final String fileName = data['fileName'];
+      
+      // A. 임시 폴더에 파일 저장
+      final tempDir = await getTemporaryDirectory();
+      // 파일명 충돌 방지를 위해 UUID나 Timestamp 붙여도 됨
+      final savePath = '${tempDir.path}/${const Uuid().v4()}_$fileName';
+      
+      final bytes = base64Decode(base64Data);
+      await File(savePath).writeAsBytes(bytes);
+
+      // B. DB에 메타데이터 저장 -> watch() 중인 UI가 자동 업데이트됨
+      await _db!.insertMedia(MediaItemsCompanion(
+        id: drift.Value(data['id']),
+        senderId: drift.Value(packet.senderId),
+        senderName: drift.Value(data['senderName']),
+        type: drift.Value(data['type']),
+        filePath: drift.Value(savePath),
+        createdAt: drift.Value(DateTime.fromMillisecondsSinceEpoch(packet.timestamp)),
+      ));
+      
+      print("[MediaManager] File Saved: $savePath");
+      
+    } catch (e) {
+      print("[MediaManager] Receive Error: $e");
+    }
+  }
+}
\ No newline at end of file
diff --git a/packages/core/lib/model/play_packet.dart b/packages/core/lib/model/play_packet.dart
new file mode 100644
index 0000000..1b66965
--- /dev/null
+++ b/packages/core/lib/model/play_packet.dart
@@ -0,0 +1,52 @@
+import 'dart:convert';
+
+/// 패킷의 종류 (라우팅 기준)
+enum PacketType {
+  system, // 시스템 (레디, 시작, 종료, 핸드셰이크 등)
+  chat,   // 채팅 (GlobalChatManager로 전달)
+  game,   // 게임 로직 (GameController로 전달)
+  media,
+  unknown
+}
+
+class PlayPacket {
+  final PacketType type;
+  final String senderId; // 보낸 사람 ID
+  final dynamic payload; // 실제 데이터 (Map, List, String 등)
+  final int timestamp;
+
+  PlayPacket({
+    required this.type,
+    required this.senderId,
+    required this.payload,
+    required this.timestamp,
+  });
+
+  // JSON -> 객체
+  factory PlayPacket.fromJson(Map<String, dynamic> json) {
+    return PlayPacket(
+      type: _parseType(json['type']),
+      senderId: json['senderId'] ?? 'unknown',
+      payload: json['payload'],
+      timestamp: json['timestamp'] ?? DateTime.now().millisecondsSinceEpoch,
+    );
+  }
+
+  // 객체 -> JSON
+  Map<String, dynamic> toJson() {
+    return {
+      'type': type.name, // enum을 문자열로 ('chat', 'game'...)
+      'senderId': senderId,
+      'payload': payload,
+      'timestamp': timestamp,
+    };
+  }
+
+  static PacketType _parseType(String? typeStr) {
+    for (var t in PacketType.values) {
+      if (t.name == typeStr) return t;
+    }
+    // 호환성: 기존 레거시 메시지(PING, ANSWER_SUBMIT 등)는 'unknown'이나 별도 처리
+    return PacketType.unknown;
+  }
+}
\ No newline at end of file
diff --git a/packages/core/lib/model/user_info.dart b/packages/core/lib/model/user_info.dart
index 6c84105..bb3f73b 100644
--- a/packages/core/lib/model/user_info.dart
+++ b/packages/core/lib/model/user_info.dart
@@ -3,51 +3,54 @@ import 'package:equatable/equatable.dart';
 class UserInfo extends Equatable {
   final String id;
   final String nickname;
-  final int avatarIndex; // 프로필 이미지 대신 사용할 아바타 번호 (0~9 등)
-  final int colorValue;  // 유저 고유 컬러 (ARGB int)
+  final int avatarIndex;
+  final int colorValue;
+  final bool isReady; // [추가] 준비 상태
 
   const UserInfo({
     required this.id,
     required this.nickname,
     this.avatarIndex = 0,
-    this.colorValue = 0xFF2196F3, // 기본값 Blue
+    this.colorValue = 0xFF2196F3,
+    this.isReady = false, // 기본값 false
   });
 
-  /// JSON -> Object 변환 (네트워크 수신 시)
   factory UserInfo.fromJson(Map<String, dynamic> json) {
     return UserInfo(
       id: json['id'] as String,
       nickname: json['nickname'] as String,
       avatarIndex: json['avatarIndex'] as int? ?? 0,
       colorValue: json['colorValue'] as int? ?? 0xFF2196F3,
+      isReady: json['isReady'] as bool? ?? false, // JSON 파싱 추가
     );
   }
 
-  /// Object -> JSON 변환 (네트워크 전송 시)
   Map<String, dynamic> toJson() {
     return {
       'id': id,
       'nickname': nickname,
       'avatarIndex': avatarIndex,
       'colorValue': colorValue,
+      'isReady': isReady, // JSON 변환 추가
     };
   }
 
-  /// 복사본 생성 (불변 객체 수정용)
   UserInfo copyWith({
     String? id,
     String? nickname,
     int? avatarIndex,
     int? colorValue,
+    bool? isReady, // copyWith 추가
   }) {
     return UserInfo(
       id: id ?? this.id,
       nickname: nickname ?? this.nickname,
       avatarIndex: avatarIndex ?? this.avatarIndex,
       colorValue: colorValue ?? this.colorValue,
+      isReady: isReady ?? this.isReady,
     );
   }
 
   @override
-  List<Object?> get props => [id, nickname, avatarIndex, colorValue];
+  List<Object?> get props => [id, nickname, avatarIndex, colorValue, isReady];
 }
\ No newline at end of file
diff --git a/packages/core/lib/network/network_manager.dart b/packages/core/lib/network/network_manager.dart
index daf9195..d13caf0 100644
--- a/packages/core/lib/network/network_manager.dart
+++ b/packages/core/lib/network/network_manager.dart
@@ -3,121 +3,180 @@ import 'dart:convert';
 import 'dart:io';
 import 'dart:typed_data';
 
-import 'package:bonsoir/bonsoir.dart'; // mDNS 패키지
+import 'package:bonsoir/bonsoir.dart';
 import 'package:flutter/foundation.dart';
+import 'package:flutter/widgets.dart';
 import 'package:uuid/uuid.dart';
 
 import '../model/user_info.dart';
+import '../model/play_packet.dart';
+import '../manager/global_chat_manager.dart';
+import '../manager/media_manager.dart'; // [New] 미디어 매니저
 
-/// 현재 네트워크 상태 (역할)
 enum NetworkRole { none, host, guest }
 
-/// P2P 네트워크 통신을 담당하는 싱글톤 매니저
-class NetworkManager extends ChangeNotifier {
-  // ------------------------------------------------------------------------
-  // 1. Singleton & Initialization
-  // ------------------------------------------------------------------------
+class NetworkManager extends ChangeNotifier with WidgetsBindingObserver {
   static final NetworkManager _instance = NetworkManager._internal();
   factory NetworkManager() => _instance;
-  NetworkManager._internal();
 
-  /// 내 정보 (앱 시작 시 initialize 호출 필수)
-  late UserInfo me;
-
-  /// 현재 내 역할
-  NetworkRole role = NetworkRole.none;
-
-  /// 초기화 메서드 (닉네임 설정 및 ID 생성)
-  void initialize({required String nickname}) {
-    // 8자리 랜덤 ID 생성
-    final uuid = const Uuid().v4().substring(0, 8);
-    // 랜덤 컬러 (간단하게 해시코드로 생성 예시)
-    final randomColor = 0xFF000000 | (nickname.hashCode & 0xFFFFFF);
-    
-    me = UserInfo(
-      id: uuid,
-      nickname: nickname,
-      colorValue: randomColor,
-    );
-    print('[Network] Initialized User: ${me.nickname} (${me.id})');
+  NetworkManager._internal() {
+    WidgetsBinding.instance.addObserver(this);
   }
 
   // ------------------------------------------------------------------------
-  // 2. Variables & Streams
+  // 상태 변수
   // ------------------------------------------------------------------------
-  
-  // 소켓
-  ServerSocket? _serverSocket; // (Host용)
-  Socket? _clientSocket;       // (Guest용)
-  final List<Socket> _connectedGuests = []; // (Host가 관리하는 게스트 목록)
+  late UserInfo me;
+  NetworkRole role = NetworkRole.none;
+
+  String? hostIp;
+  int? hostPort;
+
+  ServerSocket? _serverSocket;
+  Socket? _clientSocket;
+  
+  // 소켓과 유저 정보를 1:1 매핑
+  final Map<Socket, UserInfo?> _connectedGuests = {};
+  
+  // UI 표시용 게스트 명단
+  final List<UserInfo> guestList = [];
 
-  // mDNS (방 찾기/만들기)
   BonsoirService? _bonsoirService;
   BonsoirBroadcast? _bonsoirBroadcast;
   BonsoirDiscovery? _bonsoirDiscovery;
 
-  // 수신된 데이터를 앱(GameManager)으로 전달하는 스트림
+  // 게임 데이터 스트림
   final _messageController = StreamController<Map<String, dynamic>>.broadcast();
   Stream<Map<String, dynamic>> get messageStream => _messageController.stream;
 
-  // ------------------------------------------------------------------------
-  // 3. Host Logic (방장)
-  // ------------------------------------------------------------------------
-  
-  /// 방 만들기
-  Future<void> startHosting(String roomName) async {
-    stopNetwork(); // 기존 연결 정리
-    role = NetworkRole.host;
+  // 로그 스트림
+  final _logController = StreamController<String>.broadcast();
+  Stream<String> get logStream => _logController.stream;
 
-    try {
-      // A. TCP 서버 소켓 오픈 (Port 0 = 시스템 자동 할당)
-      _serverSocket = await ServerSocket.bind(InternetAddress.anyIPv4, 0);
-      int port = _serverSocket!.port;
-      print('[Host] Server opened on port: $port');
+  // 하트비트 & 재접속
+  Timer? _heartbeatTimer;
+  Timer? _disconnectWaitTimer;
+  DateTime? _lastPongTime;
+  bool _isReconnecting = false;
 
-final interfaces = await NetworkInterface.list(type: InternetAddressType.IPv4);
-  String myIp = '127.0.0.1';
-  try {
-    // 보통 wlan0 혹은 en0가 와이파이 인터페이스
-    myIp = interfaces.firstWhere((i) => i.name != 'lo').addresses.first.address;
-  } catch (e) {
-    print('IP search failed: $e');
+  static const int HEARTBEAT_INTERVAL_SEC = 3;
+  static const int TIMEOUT_SEC = 10;
+  static const int RECONNECT_WAIT_SEC = 5;
+
+  // ------------------------------------------------------------------------
+  // 초기화
+  // ------------------------------------------------------------------------
+  void initialize({required String nickname}) {
+    final uuid = const Uuid().v4().substring(0, 8);
+    final randomColor = 0xFF000000 | (nickname.hashCode & 0xFFFFFF);
+    me = UserInfo(id: uuid, nickname: nickname, colorValue: randomColor);
+    _log("초기화 완료: ${me.nickname}");
   }
 
-      // B. 게스트 접속 대기
+  void _log(String msg) {
+    final timestamp = DateTime.now().toIso8601String().split('T').last.substring(0, 8);
+    print("[$timestamp] $msg");
+    _logController.add("[$timestamp] $msg");
+  }
+
+  @override
+  void didChangeAppLifecycleState(AppLifecycleState state) {
+    if (state == AppLifecycleState.resumed) {
+      if (role == NetworkRole.guest && _clientSocket == null && hostIp != null) {
+        _attemptReconnection();
+      }
+    }
+  }
+
+  // ------------------------------------------------------------------------
+  // 레디 시스템
+  // ------------------------------------------------------------------------
+  void toggleReady() {
+    me = me.copyWith(isReady: !me.isReady);
+    notifyListeners();
+
+    final payload = {
+      'type': 'TOGGLE_READY',
+      'userId': me.id,
+      'isReady': me.isReady,
+    };
+    sendMessage(payload);
+
+    if (role == NetworkRole.host) {
+      _checkAllReadyAndStart();
+    }
+  }
+
+  void _checkAllReadyAndStart() {
+    if (guestList.isEmpty) return;
+    if (!me.isReady) return;
+
+    bool allGuestsReady = guestList.every((u) => u.isReady);
+
+    if (allGuestsReady) {
+      _log("🚀 전원 준비 완료! 3초 후 게임 시작...");
+      Future.delayed(const Duration(seconds: 1), () {
+        final startPayload = {'type': 'GAME_START', 'gameId': 'quiz_ox'};
+        sendMessage(startPayload);
+        _messageController.add(startPayload);
+        _resetAllReadyState();
+      });
+    }
+  }
+
+  void _resetAllReadyState() {
+    me = me.copyWith(isReady: false);
+    for (int i = 0; i < guestList.length; i++) {
+      guestList[i] = guestList[i].copyWith(isReady: false);
+    }
+    notifyListeners();
+  }
+
+  // ------------------------------------------------------------------------
+  // Host Logic
+  // ------------------------------------------------------------------------
+  Future<void> startHosting(String roomName) async {
+    stopNetwork(force: true);
+    role = NetworkRole.host;
+    
+    try {
+      _serverSocket = await ServerSocket.bind(InternetAddress.anyIPv4, 0);
+      int port = _serverSocket!.port;
+      this.hostPort = port;
+
+      String? myIp = await _getWifiIp();
+      this.hostIp = myIp ?? '127.0.0.1';
+      _log("✅ 방 생성: $hostIp : $port");
+
       _serverSocket!.listen((Socket client) {
         _handleNewGuest(client);
       });
 
-      // C. mDNS로 방 광고 (Broadcast)
-      // 서비스 타입은 고유해야 함 (_playwith._tcp)
-      // 이름 포맷: "방이름#호스트ID" (중복 방지 및 식별용)
       _bonsoirService = BonsoirService(
-        name: '$roomName#${me.id}', 
+        name: '$roomName#${me.id}',
         type: '_playwith._tcp',
         port: port,
-        attributes: {'ip': myIp},
+        attributes: {'ip': hostIp!}, 
       );
-
       _bonsoirBroadcast = BonsoirBroadcast(service: _bonsoirService!);
-      await _bonsoirBroadcast!.ready;
       await _bonsoirBroadcast!.start();
       
-      print('[Host] Start advertising room: $roomName');
+      // [NEW] 미디어 DB 초기화 (Host)
+      await MediaManager().initialize(roomName);
+
+      _startHeartbeat();
       notifyListeners();
 
     } catch (e) {
-      print('[Host] Error starting host: $e');
-      stopNetwork();
+      _log("❌ 방 생성 실패: $e");
+      stopNetwork(force: true);
     }
   }
 
-  /// 새로운 게스트가 접속했을 때
   void _handleNewGuest(Socket client) {
-    print('[Host] New guest connected: ${client.remoteAddress.address}');
-    _connectedGuests.add(client);
-
-    // 데이터 수신 리스너 부착
+    _log("🎉 연결됨: ${client.remoteAddress.address}");
+    _connectedGuests[client] = null;
+    
     client.listen(
       (Uint8List data) => _onDataReceived(client, data),
       onError: (e) => _removeGuest(client),
@@ -126,163 +185,289 @@ final interfaces = await NetworkInterface.list(type: InternetAddressType.IPv4);
   }
 
   void _removeGuest(Socket client) {
-    print('[Host] Guest disconnected');
+    final UserInfo? user = _connectedGuests[client];
+    if (user != null) {
+      _log("👋 퇴장: ${user.nickname}");
+      guestList.removeWhere((u) => u.id == user.id);
+    }
     _connectedGuests.remove(client);
     client.close();
     notifyListeners();
   }
 
   // ------------------------------------------------------------------------
-  // 4. Guest Logic (참가자)
+  // Guest Logic
   // ------------------------------------------------------------------------
-
-  /// 주변 방 찾기 (mDNS Discovery)
   Stream<List<BonsoirService>> discoverRooms() {
-    // 리스트를 계속 갱신해서 내보내기 위한 컨트롤러
     final controller = StreamController<List<BonsoirService>>();
     final List<BonsoirService> foundServices = [];
+    _bonsoirDiscovery?.stop();
 
-    _bonsoirDiscovery = BonsoirDiscovery(type: '_playwith._tcp');
-    
-    _bonsoirDiscovery!.ready.then((_) {
-      _bonsoirDiscovery!.start();
-      
-      _bonsoirDiscovery!.eventStream!.listen((event) {
-        if (event.type == BonsoirDiscoveryEventType.discoveryServiceFound) {
-          if (event.service != null) {
-            foundServices.add(event.service!);
-            controller.add(List.from(foundServices));
-          }
-        } else if (event.type == BonsoirDiscoveryEventType.discoveryServiceLost) {
-          if (event.service != null) {
-            foundServices.removeWhere((s) => s.name == event.service!.name);
-            controller.add(List.from(foundServices));
-          }
+    Future(() async {
+      try {
+        _bonsoirDiscovery = BonsoirDiscovery(type: '_playwith._tcp');
+        await _bonsoirDiscovery!.start();
+        
+        if (_bonsoirDiscovery?.eventStream != null) {
+          _bonsoirDiscovery!.eventStream!.listen((dynamic event) {
+            final String type = event.type.toString();
+            if (event.service == null) return;
+
+            if (type.contains('Found')) {
+              foundServices.removeWhere((s) => s.name == event.service!.name);
+              foundServices.add(event.service!);
+              controller.add(List.from(foundServices));
+            } else if (type.contains('Lost')) {
+              foundServices.removeWhere((s) => s.name == event.service!.name);
+              controller.add(List.from(foundServices));
+            }
+          });
         }
-      });
+      } catch (e) {
+        _log("스캔 실패: $e");
+      }
     });
-
     return controller.stream;
   }
 
-  /// 방 접속하기
   Future<void> joinRoom(String ip, int port) async {
-    stopNetwork(); // 기존 연결 정리
+    if (role != NetworkRole.guest) stopNetwork(force: true);
     role = NetworkRole.guest;
+    hostIp = ip;
+    hostPort = port;
 
     try {
-      print('[Guest] Connecting to $ip:$port...');
-      _clientSocket = await Socket.connect(ip, port);
-      print('[Guest] Connected!');
+      _log("🚀 접속 시도: $ip:$port");
+      _clientSocket = await Socket.connect(ip, port, timeout: const Duration(seconds: 5));
+      _log("✅ 접속 성공!");
 
-      // 접속 성공 시 즉시 내 정보 전송 (Handshake)
-      sendMessage({
-        'type': 'HANDSHAKE',
-        'senderId': me.id,
-        'payload': me.toJson(),
-      });
+      sendMessage({'type': 'HANDSHAKE', 'payload': me.toJson()});
+      
+      // [NEW] 미디어 DB 초기화 (Guest는 임시 ID 사용)
+      await MediaManager().initialize("guest_${ip.replaceAll('.', '_')}");
+
+      _lastPongTime = DateTime.now();
+      _startHeartbeat();
+      _cancelDisconnectTimer(); 
 
-      // 데이터 수신 리스너
       _clientSocket!.listen(
         (Uint8List data) => _onDataReceived(_clientSocket!, data),
-        onError: (e) {
-          print('[Guest] Connection error: $e');
-          stopNetwork();
-        },
-        onDone: () {
-          print('[Guest] Disconnected by host');
-          stopNetwork();
-        },
+        onError: (e) => _handleConnectionLost(e),
+        onDone: () => _handleConnectionLost("Socket Closed"),
       );
-      
       notifyListeners();
 
     } catch (e) {
-      print('[Guest] Failed to join: $e');
-      role = NetworkRole.none;
-      notifyListeners();
-      rethrow; // UI에서 에러 처리할 수 있게 던짐
+      _log("❌ 접속 실패: $e");
+      if (!_isReconnecting) stopNetwork(force: true);
+      rethrow;
     }
   }
 
   // ------------------------------------------------------------------------
-  // 5. Common Logic (데이터 송수신)
+  // 데이터 송수신 & 라우팅 (핵심)
   // ------------------------------------------------------------------------
+  void sendPacket(PlayPacket packet) {
+    sendMessage(packet.toJson());
+  }
 
-  /// 메시지 전송
   void sendMessage(Map<String, dynamic> messageMap) {
-    try {
-      // JSON 변환
-      final jsonString = jsonEncode(messageMap);
-      // 패킷 경계 처리를 위해 끝에 줄바꿈(\n) 추가 (가장 간단한 delimiter)
-      final List<int> data = utf8.encode('$jsonString\n');
+     if (role == NetworkRole.guest && _clientSocket == null) return;
 
-      if (role == NetworkRole.host) {
-        // Host는 모든 Guest에게 브로드캐스트
-        for (var socket in _connectedGuests) {
-          socket.add(data);
-        }
-      } else if (role == NetworkRole.guest) {
-        // Guest는 Host에게 전송
-        _clientSocket?.add(data);
-      }
-    } catch (e) {
-      print('[Network] Send Error: $e');
-    }
+     final jsonString = jsonEncode(messageMap);
+     // 로그 필터링
+     if (messageMap['type'] != 'PING' && messageMap['type'] != 'PONG') {
+       if (messageMap['type'] == 'chat') {
+          _log("📤 전송: [CHAT]");
+       } else if (messageMap['type'] == 'media') {
+          _log("📤 전송: [MEDIA]");
+       } else {
+          _log("📤 전송: $jsonString");
+       }
+     }
+     
+     final List<int> data = utf8.encode('$jsonString\n');
+     if (role == NetworkRole.host) {
+       for (var socket in _connectedGuests.keys) {
+         socket.add(data);
+       }
+     } else {
+       _clientSocket?.add(data);
+     }
   }
 
-  /// 데이터 수신 처리
   void _onDataReceived(Socket socket, Uint8List data) {
-    // 들어온 데이터를 String으로 변환
     final String rawString = utf8.decode(data);
-
-    // TCP 패킷이 뭉쳐서 올 수 있으므로 \n으로 쪼갬
     final List<String> splitMessages = rawString.split('\n');
-
+    
     for (var msg in splitMessages) {
       if (msg.trim().isEmpty) continue;
-
+      
       try {
-        final Map<String, dynamic> parsedData = jsonDecode(msg);
-        
-        // 1. 앱 로직으로 전달
-        _messageController.add(parsedData);
+        final Map<String, dynamic> jsonMap = jsonDecode(msg);
 
-        // 2. (옵션) Host라면, 받은 메시지를 다른 Guest들에게도 전달(Relay)해야 할 수 있음
-        // 게임 로직에 따라 다르지만 보통 Host가 중계자 역할을 함
-        // if (role == NetworkRole.host) { sendMessage(parsedData); }
+        // 1. 시스템 메시지 (Ping/Pong)
+        if (jsonMap['type'] == 'PING') {
+          sendMessage({'type': 'PONG'});
+          _lastPongTime = DateTime.now();
+          return;
+        }
+        if (jsonMap['type'] == 'PONG') {
+          _lastPongTime = DateTime.now();
+          return;
+        }
+        
+        // 2. 핸드셰이크
+        if (jsonMap['type'] == 'HANDSHAKE') {
+          final guestInfo = UserInfo.fromJson(jsonMap['payload']);
+          _connectedGuests[socket] = guestInfo;
+          guestList.removeWhere((u) => u.id == guestInfo.id);
+          guestList.add(guestInfo);
+          notifyListeners();
+          _messageController.add(jsonMap);
+          return;
+        }
+
+        // 3. 레디 토글
+        if (jsonMap['type'] == 'TOGGLE_READY') {
+          final String userId = jsonMap['userId'];
+          final bool isReady = jsonMap['isReady'];
+
+          final index = guestList.indexWhere((u) => u.id == userId);
+          if (index != -1) {
+            guestList[index] = guestList[index].copyWith(isReady: isReady);
+            notifyListeners();
+          }
+
+          if (role == NetworkRole.host) {
+            sendMessage(jsonMap); 
+            _checkAllReadyAndStart();
+          }
+          _messageController.add(jsonMap);
+          return;
+        }
+        
+        // 4. 게임 시작
+        if (jsonMap['type'] == 'GAME_START') {
+           _resetAllReadyState();
+           _messageController.add(jsonMap);
+           return;
+        }
+
+        // 5. 패킷 라우팅 (Chat, Media, Game)
+        if (jsonMap.containsKey('payload') && jsonMap.containsKey('senderId')) {
+           final packet = PlayPacket.fromJson(jsonMap);
+           
+           // [라우팅] 채팅 -> GlobalChatManager
+           if (packet.type == PacketType.chat) {
+             GlobalChatManager().onPacketReceived(packet);
+             return;
+           }
+           
+           // [라우팅] 미디어 -> MediaManager
+           if (packet.type == PacketType.media) {
+             MediaManager().onMediaReceived(packet);
+             return;
+           }
+        }
+
+        // 6. 그 외 게임 데이터
+        _messageController.add(jsonMap);
 
       } catch (e) {
-        print('[Network] Parse Error: $e\nMessage: $msg');
+        _log("파싱 에러: $e");
       }
     }
   }
 
   // ------------------------------------------------------------------------
-  // 6. Cleanup
+  // 연결 관리
   // ------------------------------------------------------------------------
-
-  /// 네트워크 종료 및 리소스 정리
-  void stopNetwork() {
-    print('[Network] Stopping network...');
+  void _handleConnectionLost(dynamic reason) {
+    if (role != NetworkRole.guest) return;
+    _log("⚠️ 연결 끊김: $reason");
     
-    // mDNS 중지
+    _clientSocket?.destroy();
+    _clientSocket = null;
+
+    if (_disconnectWaitTimer != null && _disconnectWaitTimer!.isActive) return;
+
+    _disconnectWaitTimer = Timer(const Duration(seconds: RECONNECT_WAIT_SEC), () {
+       _log("💀 복구 실패. 종료.");
+       stopNetwork(force: true);
+    });
+    _attemptReconnection();
+  }
+
+  Future<void> _attemptReconnection() async {
+    if (hostIp == null || hostPort == null) return;
+    _isReconnecting = true;
+    while (_disconnectWaitTimer != null && _disconnectWaitTimer!.isActive) {
+      try {
+        await joinRoom(hostIp!, hostPort!);
+        _log("✅ 재접속 성공!");
+        _isReconnecting = false;
+        return;
+      } catch (e) {
+        await Future.delayed(const Duration(seconds: 1));
+      }
+    }
+    _isReconnecting = false;
+  }
+
+  void _cancelDisconnectTimer() {
+    _disconnectWaitTimer?.cancel();
+    _disconnectWaitTimer = null;
+  }
+
+  void _startHeartbeat() {
+    _heartbeatTimer?.cancel();
+    _heartbeatTimer = Timer.periodic(const Duration(seconds: HEARTBEAT_INTERVAL_SEC), (timer) {
+      try { sendMessage({'type': 'PING'}); } catch (_) {}
+      if (role == NetworkRole.guest && _lastPongTime != null) {
+        if (DateTime.now().difference(_lastPongTime!).inSeconds > TIMEOUT_SEC) {
+          _handleConnectionLost("Heartbeat Timeout");
+        }
+      }
+    });
+  }
+
+  Future<String?> _getWifiIp() async {
+    try {
+      for (var interface in await NetworkInterface.list()) {
+        if (interface.name.contains('wlan') || interface.name.contains('en') || interface.name.contains('ap')) {
+          for (var addr in interface.addresses) {
+            if (addr.type == InternetAddressType.IPv4 && !addr.isLoopback) {
+              return addr.address;
+            }
+          }
+        }
+      }
+    } catch (e) {/**/}
+    return null;
+  }
+
+  void stopNetwork({bool force = false}) {
+    if (!force && _disconnectWaitTimer != null) return;
+    
+    _log("🛑 종료");
+    // [NEW] 미디어 DB 정리
+    MediaManager().cleanup();
+
+    _heartbeatTimer?.cancel();
+    _disconnectWaitTimer?.cancel();
+    _disconnectWaitTimer = null;
     _bonsoirBroadcast?.stop();
     _bonsoirDiscovery?.stop();
-    
-    // 소켓 닫기
     _serverSocket?.close();
     _clientSocket?.close();
-    
-    for (var socket in _connectedGuests) {
-      socket.close();
-    }
+    for (var s in _connectedGuests.keys) s.close();
     _connectedGuests.clear();
-
+    guestList.clear();
     role = NetworkRole.none;
     _serverSocket = null;
     _clientSocket = null;
-    
+    if (force) { hostIp = null; hostPort = null; }
     notifyListeners();
   }
 }
\ No newline at end of file
diff --git a/packages/core/lib/playwith_core.dart b/packages/core/lib/playwith_core.dart
index 386e68f..96e7a8d 100644
--- a/packages/core/lib/playwith_core.dart
+++ b/packages/core/lib/playwith_core.dart
@@ -1,7 +1,14 @@
-// lib/playwith_core.dart
-
 library playwith_core;
 
 export 'game/base_game.dart';
 export 'network/network_manager.dart';
-export 'model/user_info.dart';
\ No newline at end of file
+export 'model/user_info.dart';
+export 'model/play_packet.dart';
+export 'utils/sound_manager.dart';
+export 'manager/global_chat_manager.dart';
+export 'widgets/game_chat_overlay.dart';
+
+// [추가] DB 관련 (Drift가 생성한 데이터 클래스들도 쓰기 위해)
+export 'database/ephemeral_database.dart';
+// Drift의 기본 타입(Value 등)을 쓰려면 아래 줄도 필요할 수 있음 (선택)
+export 'package:drift/drift.dart' show Value;
\ No newline at end of file
diff --git a/packages/core/lib/utils/sound_manager.dart b/packages/core/lib/utils/sound_manager.dart
new file mode 100644
index 0000000..b4826fd
--- /dev/null
+++ b/packages/core/lib/utils/sound_manager.dart
@@ -0,0 +1,65 @@
+import 'package:audioplayers/audioplayers.dart';
+
+/// 사운드 키 상수 (오타 방지용)
+class SoundKey {
+  static const String bgm = 'bgm';
+  static const String correct = 'correct';
+  static const String wrong = 'wrong';
+  static const String win = 'win';
+  static const String click = 'click';
+}
+
+class SoundManager {
+  static final SoundManager _instance = SoundManager._internal();
+  factory SoundManager() => _instance;
+  SoundManager._internal();
+
+  final AudioPlayer _bgmPlayer = AudioPlayer();
+  final AudioPlayer _sfxPlayer = AudioPlayer();
+
+  // [핵심] 키-경로 매핑 저장소
+  final Map<String, String> _soundPaths = {};
+  bool _isInitialized = false;
+
+  /// 앱 시작 시 사운드 경로 주입 (Dependency Injection)
+  void initialize({required Map<String, String> soundPaths}) {
+    _soundPaths.addAll(soundPaths);
+    _isInitialized = true;
+    print('[SoundManager] Initialized with ${_soundPaths.length} sounds');
+  }
+
+  /// BGM 재생
+  Future<void> playBgm(String key) async {
+    if (!_isInitialized) return;
+    final path = _soundPaths[key];
+    
+    if (path != null) {
+      await _bgmPlayer.setReleaseMode(ReleaseMode.loop);
+      await _bgmPlayer.setVolume(0.3);
+      // AssetSource는 'assets/'를 생략하고 그 하위 경로를 입력받습니다.
+      // 예: assets/audio/bgm.mp3 -> AssetSource('audio/bgm.mp3')
+      await _bgmPlayer.play(AssetSource(path));
+    } else {
+      print('[SoundManager] BGM Key not found: $key');
+    }
+  }
+
+  Future<void> stopBgm() async {
+    await _bgmPlayer.stop();
+  }
+
+  /// 효과음 재생
+  Future<void> playSfx(String key) async {
+    if (!_isInitialized) return;
+    final path = _soundPaths[key];
+
+    if (path != null) {
+      // 효과음은 겹칠 수 있으므로 매번 stop 하거나 모드 설정
+      await _sfxPlayer.stop();
+      await _sfxPlayer.setVolume(1.0);
+      await _sfxPlayer.play(AssetSource(path));
+    } else {
+      print('[SoundManager] SFX Key not found: $key');
+    }
+  }
+}
\ No newline at end of file
diff --git a/packages/core/lib/widgets/game_chat_overlay.dart b/packages/core/lib/widgets/game_chat_overlay.dart
new file mode 100644
index 0000000..a1dcf97
--- /dev/null
+++ b/packages/core/lib/widgets/game_chat_overlay.dart
@@ -0,0 +1,229 @@
+import 'dart:io';
+import 'package:flutter/material.dart';
+import 'package:image_picker/image_picker.dart';
+import '../manager/global_chat_manager.dart';
+import '../manager/media_manager.dart'; // 미디어 매니저
+import '../database/ephemeral_database.dart'; // DB 모델
+
+class GameChatOverlay extends StatefulWidget {
+  const GameChatOverlay({super.key});
+
+  @override
+  State<GameChatOverlay> createState() => _GameChatOverlayState();
+}
+
+class _GameChatOverlayState extends State<GameChatOverlay> {
+  final TextEditingController _textController = TextEditingController();
+  final ScrollController _scrollController = ScrollController();
+  bool _isExpanded = false;
+
+  @override
+  Widget build(BuildContext context) {
+    return Align(
+      alignment: Alignment.bottomCenter,
+      child: AnimatedContainer(
+        duration: const Duration(milliseconds: 300),
+        // 높이 조정: 미디어 갤러리가 보일 공간 확보 (펼쳤을 때)
+        height: _isExpanded ? 500 : 60, 
+        margin: const EdgeInsets.all(10),
+        decoration: BoxDecoration(
+          color: Colors.black.withOpacity(0.85),
+          borderRadius: BorderRadius.circular(20),
+          boxShadow: [BoxShadow(color: Colors.black26, blurRadius: 10, spreadRadius: 2)],
+        ),
+        child: Column(
+          children: [
+            // 1. 상단 핸들 (접기/펼치기)
+            GestureDetector(
+              onTap: () => setState(() => _isExpanded = !_isExpanded),
+              behavior: HitTestBehavior.translucent,
+              child: Container(
+                width: double.infinity,
+                height: 30,
+                alignment: Alignment.center,
+                child: Icon(
+                  _isExpanded ? Icons.keyboard_arrow_down : Icons.keyboard_arrow_up,
+                  color: Colors.white,
+                ),
+              ),
+            ),
+
+            // 펼쳤을 때만 보이는 영역
+            if (_isExpanded) ...[
+              
+              // 2. 미디어 갤러리 (가로 스크롤)
+              // DB의 변경사항을 실시간으로 감지(Stream)하여 보여줌
+              SizedBox(
+                height: 100,
+                child: StreamBuilder<List<MediaItem>>(
+                  stream: MediaManager().galleryStream,
+                  builder: (context, snapshot) {
+                    final mediaList = snapshot.data ?? [];
+                    
+                    if (mediaList.isEmpty) {
+                      return const Center(child: Text("공유된 미디어가 없습니다.", style: TextStyle(color: Colors.white54, fontSize: 12)));
+                    }
+
+                    return ListView.builder(
+                      scrollDirection: Axis.horizontal,
+                      padding: const EdgeInsets.symmetric(horizontal: 10),
+                      itemCount: mediaList.length,
+                      itemBuilder: (context, index) {
+                        final item = mediaList[index];
+                        return Padding(
+                          padding: const EdgeInsets.only(right: 8.0),
+                          child: GestureDetector(
+                            onTap: () => _showFullImage(context, item),
+                            child: ClipRRect(
+                              borderRadius: BorderRadius.circular(8),
+                              child: Image.file(
+                                File(item.filePath),
+                                width: 100,
+                                height: 100,
+                                fit: BoxFit.cover,
+                                errorBuilder: (_,__,___) => Container(
+                                  width: 100, height: 100, color: Colors.grey,
+                                  child: const Icon(Icons.broken_image),
+                                ),
+                              ),
+                            ),
+                          ),
+                        );
+                      },
+                    );
+                  },
+                ),
+              ),
+              
+              const Divider(color: Colors.white24),
+
+              // 3. 채팅 리스트
+              Expanded(
+                child: StreamBuilder<List<ChatMessage>>(
+                  stream: GlobalChatManager().messageStream,
+                  builder: (context, snapshot) {
+                    final messages = snapshot.data ?? [];
+                    WidgetsBinding.instance.addPostFrameCallback((_) {
+                      if (_scrollController.hasClients) {
+                        _scrollController.jumpTo(_scrollController.position.maxScrollExtent);
+                      }
+                    });
+                    return ListView.builder(
+                      controller: _scrollController,
+                      padding: const EdgeInsets.symmetric(horizontal: 10),
+                      itemCount: messages.length,
+                      itemBuilder: (context, index) {
+                        final msg = messages[index];
+                        return Padding(
+                          padding: const EdgeInsets.symmetric(vertical: 2),
+                          child: Text(
+                            "${msg.senderName}: ${msg.text}",
+                            style: TextStyle(
+                              color: msg.isMe ? Colors.yellow : Colors.white,
+                              fontSize: 14,
+                            ),
+                          ),
+                        );
+                      },
+                    );
+                  },
+                ),
+              ),
+
+              // 4. 입력창 (+ 미디어 버튼)
+              Padding(
+                padding: const EdgeInsets.all(8.0),
+                child: Row(
+                  children: [
+                    // [추가] 이미지 전송 버튼
+                    IconButton(
+                      icon: const Icon(Icons.add_photo_alternate, color: Colors.blueAccent),
+                      onPressed: _pickAndSendImage,
+                    ),
+                    Expanded(
+                      child: TextField(
+                        controller: _textController,
+                        style: const TextStyle(color: Colors.white),
+                        decoration: const InputDecoration(
+                          hintText: "채팅 입력...",
+                          hintStyle: TextStyle(color: Colors.white54),
+                          border: InputBorder.none,
+                          isDense: true,
+                        ),
+                        onSubmitted: _sendMessage,
+                      ),
+                    ),
+                    IconButton(
+                      icon: const Icon(Icons.send, color: Colors.blue),
+                      onPressed: () => _sendMessage(_textController.text),
+                    ),
+                  ],
+                ),
+              ),
+            ],
+          ],
+        ),
+      ),
+    );
+  }
+
+  void _sendMessage(String text) {
+    if (text.trim().isEmpty) return;
+    GlobalChatManager().sendMessage(text);
+    _textController.clear();
+  }
+
+  // [이미지 선택 및 전송 로직]
+  Future<void> _pickAndSendImage() async {
+    final picker = ImagePicker();
+    // 갤러리에서 이미지 선택 (압축 옵션 추가 권장)
+    final XFile? image = await picker.pickImage(
+      source: ImageSource.gallery,
+      imageQuality: 50, // 전송 속도를 위해 품질 낮춤
+      maxWidth: 800,
+    );
+
+    if (image != null) {
+      // MediaManager를 통해 전송
+      await MediaManager().sendMedia(
+        filePath: image.path,
+        type: 'IMAGE',
+      );
+    }
+  }
+
+  // [이미지 크게 보기 팝업]
+  void _showFullImage(BuildContext context, MediaItem item) {
+    showDialog(
+      context: context,
+      builder: (ctx) => Dialog(
+        backgroundColor: Colors.transparent,
+        insetPadding: EdgeInsets.zero,
+        child: Stack(
+          alignment: Alignment.center,
+          children: [
+            InteractiveViewer(
+              child: Image.file(File(item.filePath)),
+            ),
+            Positioned(
+              top: 40,
+              right: 20,
+              child: IconButton(
+                icon: const Icon(Icons.close, color: Colors.white, size: 30),
+                onPressed: () => Navigator.pop(ctx),
+              ),
+            ),
+            Positioned(
+              bottom: 20,
+              child: Container(
+                padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 5),
+                color: Colors.black54,
+                child: Text("보낸 사람: ${item.senderName}", style: const TextStyle(color: Colors.white)),
+              ),
+            )
+          ],
+        ),
+      ),
+    );
+  }
+}
\ No newline at end of file
diff --git a/packages/core/pubspec.yaml b/packages/core/pubspec.yaml
index ebded68..43f00e6 100644
--- a/packages/core/pubspec.yaml
+++ b/packages/core/pubspec.yaml
@@ -8,9 +8,21 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  # 네트워크 디스커버리 (mDNS)
-  bonsoir: ^2.0.0 
-  # 고유 ID 생성
+  # 기존 ^2.0.0 등을 지우고 최신 버전으로 변경
+  bonsoir: ^6.0.1
   uuid: ^4.0.0
-  # 데이터 비교 및 불변성 (선택사항이지만 추천)
-  equatable: ^2.0.5
\ No newline at end of file
+  equatable: ^2.0.5
+  permission_handler: ^11.0.0
+  # [DB]
+  drift: ^2.13.0
+  sqlite3_flutter_libs: ^0.5.0
+  path_provider: ^2.1.1
+  path: ^1.8.3
+
+  # [파일 피커]
+  image_picker: ^1.0.4
+  file_picker: ^6.1.1
+
+dev_dependencies:
+  drift_dev: ^2.13.0
+  build_runner: ^2.4.6
\ No newline at end of file
diff --git a/packages/games/quiz/lib/quiz_game.dart b/packages/games/quiz/lib/quiz_game.dart
new file mode 100644
index 0000000..4aee447
--- /dev/null
+++ b/packages/games/quiz/lib/quiz_game.dart
@@ -0,0 +1,618 @@
+import 'dart:async';
+import 'package:flutter/material.dart';
+import 'package:playwith_core/playwith_core.dart';
+
+enum PlayerStatus { alive, dead, winner, loser }
+
+class QuizGame extends BaseGame {
+  @override
+  String get id => "quiz_ox";
+
+  @override
+  String get name => "OX 퀴즈 서바이벌";
+
+  @override
+  String get description => "방장도 플레이어! 3초 안에 선택하세요.";
+
+  // ------------------------------------------------------------------------
+  // 상태 변수
+  // ------------------------------------------------------------------------
+  final _gameStateController = StreamController<Map<String, dynamic>>.broadcast();
+  Stream<Map<String, dynamic>> get gameStateStream => _gameStateController.stream;
+  StreamSubscription? _networkSubscription;
+
+  // UI 초기화 지연 방지용 데이터
+  Map<String, dynamic>? _lastState;
+
+  // 게임 데이터
+  final Set<String> _aliveUsers = {};    // 생존자 ID
+  final Set<String> _answeredUsers = {}; // 답변 제출자 ID
+
+  // 나의 상태
+  PlayerStatus _myStatus = PlayerStatus.alive;
+  String? _mySelectedAnswer;
+  bool _isLockedIn = false;
+  Timer? _lockInTimer;
+
+  // 카운트다운 상태
+  bool _isCountingDown = false;
+  int _countdownValue = 3;
+
+  final List<Map<String, dynamic>> _questions = [
+    {"q": "사과는 영어로 Apple이다.", "a": "O"},
+    {"q": "바나나는 길어지면 기차다.", "a": "X"},
+    {"q": "플러터는 구글이 만들었다.", "a": "O"},
+    {"q": "지범님은 천재 개발자다.", "a": "O"},
+    {"q": "북극곰의 피부색은 검은색이다.", "a": "O"},
+    {"q": "타조는 날 수 있다.", "a": "X"},
+  ];
+  
+  int _currentQuestionIndex = -1;
+
+  // ------------------------------------------------------------------------
+  // 라이프사이클
+  // ------------------------------------------------------------------------
+  @override
+  void onStart() {
+    print("Quiz Game Started!");
+    _resetLocalState();
+    _lastState = null;
+    _aliveUsers.clear();
+
+    // 참가자 명단 초기화 (나 + 게스트)
+    _aliveUsers.add(NetworkManager().me.id);
+    for (var guest in NetworkManager().guestList) {
+      _aliveUsers.add(guest.id);
+    }
+
+    _networkSubscription = NetworkManager().messageStream.listen((payload) {
+      onMessageReceived("", payload);
+    });
+
+    // [Host] 잠시 후 카운트다운 시작
+    if (NetworkManager().role == NetworkRole.host) {
+      Future.delayed(const Duration(milliseconds: 1000), () {
+        _startCountdown();
+      });
+    }
+  }
+
+  @override
+  void onDispose() {
+    _lockInTimer?.cancel();
+    _networkSubscription?.cancel();
+    _gameStateController.close();
+  }
+
+  // [Host] 카운트다운
+  void _startCountdown() {
+    if (_currentQuestionIndex != -1) return; 
+
+    Timer.periodic(const Duration(seconds: 1), (timer) {
+      int nextCount = 3 - timer.tick;
+      if (nextCount > 0) {
+        _broadcastState({'type': 'GAME_COUNTDOWN', 'count': nextCount});
+      } else {
+        timer.cancel();
+        _nextQuestion(); // 첫 문제 출제
+      }
+    });
+    _broadcastState({'type': 'GAME_COUNTDOWN', 'count': 3});
+  }
+
+  // ------------------------------------------------------------------------
+  // 메시지 처리 (Logic)
+  // ------------------------------------------------------------------------
+  @override
+  void onMessageReceived(String senderId, Map<String, dynamic> payload) {
+    
+    if (payload['type'] != 'ANSWER_SUBMIT') {
+       _lastState = payload;
+    }
+
+    // 1. [Common] 카운트다운
+    if (payload['type'] == 'GAME_COUNTDOWN') {
+      _isCountingDown = true;
+      _countdownValue = payload['count'];
+      SoundManager().playSfx(SoundKey.click);
+      _gameStateController.add(payload);
+    }
+
+    // 2. [Host Logic] 답변 제출 처리
+    if (payload['type'] == 'ANSWER_SUBMIT') {
+      if (NetworkManager().role != NetworkRole.host) return;
+
+      final String userId = payload['userId'];
+      final String answer = payload['answer'];
+
+      if (!_aliveUsers.contains(userId)) return;
+      if (_answeredUsers.contains(userId)) return;
+
+      _answeredUsers.add(userId);
+
+      // 정답 체크 (결과는 바로 반영하되, 탈락 통보는 결과 화면 때 보냄)
+      final currentAnswer = _questions[_currentQuestionIndex]['a'];
+      bool isCorrect = (answer == currentAnswer);
+
+      if (!isCorrect) {
+        _aliveUsers.remove(userId); // 명단에서는 제거하되, 통보는 나중에
+      }
+
+      // 제출 현황 전파
+      _broadcastState({
+        'type': 'PLAYER_STATUS_UPDATE',
+        'userId': userId,
+        'isSubmitted': true,
+        'isAlive': true // 아직은 살아있는 척 (결과 화면에서 공개)
+      });
+
+      // [핵심 변경] 전원 제출 완료 시 -> 결과 발표 화면으로 이동
+      // (방금 죽은 사람 포함해서 이번 라운드 시작 인원만큼 답변이 왔는지 체크)
+      int currentRoundPlayers = _aliveUsers.length + (isCorrect ? 0 : 1); // 방금 뺀 사람 포함
+      // 더 정확히는: answeredUsers가 이번 라운드 참가자 수에 도달하면 진행
+      // (여기선 간단히 answeredUsers가 더이상 늘어날 수 없을 때로 판단)
+      
+      // 타임아웃 로직이 없으므로, 현재 살아있는 사람들이 다 냈으면 진행
+      // (로직이 복잡해질 수 있으므로, 간단히 '살아있는 사람 수 == 답변 수'가 아니라
+      //  '이번 라운드 시작 시점의 생존자 수'를 별도 변수로 관리하는 게 정석이지만,
+      //  여기서는 생존자 수 + 이번에 틀린 사람 수로 계산)
+      
+      // 간단 로직: 1초 뒤 체크해서 더 낼 사람이 없으면 진행 (혹은 모두 냈으면 바로)
+      Future.delayed(const Duration(milliseconds: 500), () {
+         // 대충 모두 냈다고 판단되면 (추가 보정 필요할 수 있음)
+         if (_answeredUsers.length >= (_aliveUsers.length + (isCorrect?0:1))) {
+            _showRoundResult(); 
+         }
+      });
+    }
+
+    // 3. [Common] 중간 결과 발표 (NEW)
+    if (payload['type'] == 'ROUND_RESULT') {
+      _isCountingDown = false;
+      final bool isSurvived = payload['survivors'].contains(NetworkManager().me.id);
+      
+      // 내 생존 여부 업데이트
+      if (!isSurvived && _myStatus == PlayerStatus.alive) {
+        _handleElimination();
+      }
+      
+      _gameStateController.add(payload);
+    }
+
+    // 4. [Common] 플레이어 상태 업데이트
+    if (payload['type'] == 'PLAYER_STATUS_UPDATE') {
+      final userId = payload['userId'];
+      _answeredUsers.add(userId);
+      _gameStateController.add(payload);
+    }
+
+    // 5. [Common] 새 문제 시작
+    if (payload['type'] == 'GAME_STATE_UPDATE' && payload['status'] == 'QUESTION') {
+      _isCountingDown = false;
+      _resetLocalState();
+      _gameStateController.add(payload);
+    }
+
+    // 6. [Common] 종료
+    if (payload['type'] == 'GAME_OVER' || payload['type'] == 'GAME_EXIT') {
+       if (payload['type'] == 'GAME_OVER') {
+          final winnerId = payload['winnerId'];
+          _myStatus = (winnerId == NetworkManager().me.id) ? PlayerStatus.winner : PlayerStatus.loser;
+          if (_myStatus == PlayerStatus.winner) SoundManager().playSfx(SoundKey.win);
+       }
+       _gameStateController.add(payload);
+    }
+  }
+
+  void _handleElimination() {
+    SoundManager().playSfx(SoundKey.wrong);
+    _myStatus = PlayerStatus.dead;
+  }
+
+  // ------------------------------------------------------------------------
+  // [Host Logic]
+  // ------------------------------------------------------------------------
+  // [NEW] 결과 발표 단계
+  void _showRoundResult() {
+    final currentQ = _questions[_currentQuestionIndex];
+    
+    final resultData = {
+      'type': 'ROUND_RESULT',
+      'status': 'RESULT',
+      'correctAnswer': currentQ['a'],
+      'survivors': _aliveUsers.toList(), // 생존자 명단 전송
+    };
+    
+    _broadcastState(resultData);
+
+    // 3초 뒤 다음 문제로 자동 이동
+    Future.delayed(const Duration(seconds: 3), () {
+      _nextQuestion();
+    });
+  }
+
+  void _nextQuestion() {
+    // 승패 판정
+    int totalStartPlayers = NetworkManager().guestList.length + 1;
+    if ((totalStartPlayers > 1 && _aliveUsers.length <= 1) || _currentQuestionIndex >= _questions.length - 1) {
+       String? winnerId;
+       if (_aliveUsers.isNotEmpty) winnerId = _aliveUsers.first;
+       _finishGame(winnerId: winnerId); 
+       return;
+    }
+
+    _currentQuestionIndex++;
+    final questionData = _questions[_currentQuestionIndex];
+    
+    final stateData = {
+      'type': 'GAME_STATE_UPDATE', 
+      'status': 'QUESTION', 
+      'data': questionData
+    };
+    
+    _resetLocalState();
+    _broadcastState(stateData);
+  }
+
+  void _finishGame({String? winnerId}) {
+    final endData = {
+      'type': 'GAME_OVER', 
+      'winnerId': winnerId ?? 'NONE',
+      'winnerName': _findUserName(winnerId)
+    };
+    _broadcastState(endData);
+  }
+
+  void _broadcastState(Map<String, dynamic> data) {
+    _lastState = data;
+    _gameStateController.add(data);
+    if (NetworkManager().role == NetworkRole.host) {
+      NetworkManager().sendMessage(data);
+    }
+  }
+
+  void _resetLocalState() {
+    _answeredUsers.clear();
+    _mySelectedAnswer = null;
+    _isLockedIn = false;
+    _lockInTimer?.cancel();
+  }
+
+  String _findUserName(String? id) {
+    if (id == null) return '없음';
+    if (id == NetworkManager().me.id) return NetworkManager().me.nickname;
+    return NetworkManager().guestList.firstWhere((u) => u.id == id, orElse: () => UserInfo(id: '', nickname: 'Unknown')).nickname;
+  }
+
+  // ------------------------------------------------------------------------
+  // [UI] Unified View
+  // ------------------------------------------------------------------------
+  @override
+  Widget buildHostView(BuildContext context) => _buildGameScreen(context, isHost: true);
+
+  @override
+  Widget buildGuestView(BuildContext context) => _buildGameScreen(context, isHost: false);
+
+  Widget _buildGameScreen(BuildContext context, {required bool isHost}) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text("OX 서바이벌"),
+        automaticallyImplyLeading: false,
+        actions: [
+          if (isHost) IconButton(icon: const Icon(Icons.power_settings_new), onPressed: () => _confirmExit(context))
+        ],
+      ),
+      body: StreamBuilder<Map<String, dynamic>>(
+        stream: gameStateStream,
+        initialData: _lastState,
+        builder: (context, snapshot) {
+          if (!snapshot.hasData) return _buildWaitingScreen("로딩 중...");
+
+          final data = snapshot.data!;
+          
+          if (data['type'] == 'GAME_COUNTDOWN') {
+             int count = data['count'] ?? 3;
+             return Center(child: Text("$count", style: const TextStyle(fontSize: 120, fontWeight: FontWeight.bold, color: Colors.blueAccent)));
+          }
+
+          if (data['type'] == 'GAME_EXIT') {
+             WidgetsBinding.instance.addPostFrameCallback((_) { if(context.mounted) Navigator.pop(context); });
+             return const Center(child: Text("종료 중..."));
+          }
+          if (data['type'] == 'GAME_OVER') {
+             return _buildResultScreen(context, data['winnerName']);
+          }
+
+          // [NEW] 중간 결과 화면
+          if (data['status'] == 'RESULT') {
+             return _buildRoundResultScreen(data);
+          }
+
+          // 문제 풀이 화면
+          if (data['status'] == 'QUESTION' || _currentQuestionIndex >= 0) {
+             Map<String, dynamic> qData = data['data'] ?? _questions[_currentQuestionIndex];
+             int answered = data['answeredCount'] ?? _answeredUsers.length;
+             // 총인원 계산 (생존자 기준이 아님, 이번 라운드 참여자 기준이어야 함. 여기선 간단히 전체 인원 사용)
+             int total = NetworkManager().guestList.length + 1; 
+
+             return _buildPlayArea(context, qData, answered, total);
+          }
+
+          return _buildWaitingScreen("대기 중...");
+        },
+      ),
+    );
+  }
+
+  // [NEW] 중간 결과 화면 위젯
+  Widget _buildRoundResultScreen(Map<String, dynamic> data) {
+    final String correctAnswer = data['correctAnswer'];
+    final List<dynamic> survivors = data['survivors'] ?? [];
+    final bool amISurvived = survivors.contains(NetworkManager().me.id);
+
+    return Center(
+      child: Column(
+        mainAxisAlignment: MainAxisAlignment.center,
+        children: [
+          const Text("정답은?", style: TextStyle(fontSize: 24, color: Colors.grey)),
+          const SizedBox(height: 20),
+          // 정답 표시
+          Container(
+            width: 150, height: 150,
+            decoration: BoxDecoration(
+              color: correctAnswer == "O" ? Colors.blue : Colors.red,
+              shape: BoxShape.circle,
+            ),
+            child: Center(child: Text(correctAnswer, style: const TextStyle(fontSize: 80, color: Colors.white, fontWeight: FontWeight.bold))),
+          ),
+          const SizedBox(height: 40),
+          
+          // 생존 여부 메시지
+          if (_myStatus == PlayerStatus.dead)
+            const Text("이미 탈락하셨습니다. 👻", style: TextStyle(fontSize: 20, color: Colors.grey))
+          else if (amISurvived)
+            const Text("생존! 다음 라운드 진출! 🎉", style: TextStyle(fontSize: 22, fontWeight: FontWeight.bold, color: Colors.green))
+          else
+            const Text("탈락했습니다... 😭", style: TextStyle(fontSize: 22, fontWeight: FontWeight.bold, color: Colors.red)),
+            
+          const SizedBox(height: 20),
+          Text("잠시 후 다음 문제가 시작됩니다.", style: TextStyle(color: Colors.grey[600])),
+        ],
+      ),
+    );
+  }
+
+  Widget _buildPlayArea(BuildContext context, Map<String, dynamic> qData, int answered, int total) {
+    if (_myStatus == PlayerStatus.dead) {
+      return Center(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: [
+            const Icon(Icons.sentiment_dissatisfied, size: 80, color: Colors.grey),
+            const SizedBox(height: 20),
+            const Text("탈락했습니다 👻", style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold)),
+            const SizedBox(height: 20),
+            Text("관전 중... ($answered명 제출)", style: const TextStyle(fontSize: 18, color: Colors.grey)),
+            const SizedBox(height: 40),
+            Text("문제: ${qData['q']}", style: const TextStyle(color: Colors.grey)),
+          ],
+        ),
+      );
+    }
+
+    return Column(
+      children: [
+        // 상단 현황판
+        _PlayerStatusGrid(aliveUsers: _aliveUsers, answeredUsers: _answeredUsers),
+        const Divider(),
+        
+        Expanded(
+          flex: 4,
+          child: Center(
+            child: Padding(
+              padding: const EdgeInsets.all(24.0),
+              child: Text(
+                qData['q'], 
+                textAlign: TextAlign.center, 
+                style: const TextStyle(fontSize: 32, fontWeight: FontWeight.bold, height: 1.3),
+              ),
+            ),
+          ),
+        ),
+        Expanded(
+          flex: 3,
+          child: _isLockedIn
+              ? _buildLockedUI()
+              : Row(
+                  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+                  children: [
+                    _AnswerBtn(text: "O", color: Colors.blue, isSelected: _mySelectedAnswer == "O", onTap: () => _selectAnswer("O")),
+                    _AnswerBtn(text: "X", color: Colors.red, isSelected: _mySelectedAnswer == "X", onTap: () => _selectAnswer("X")),
+                  ],
+                ),
+        ),
+        SizedBox(
+          height: 60,
+          child: Center(
+            child: _mySelectedAnswer != null && !_isLockedIn
+                ? const Text("3초 후 확정됩니다! (변경 가능)", style: TextStyle(color: Colors.red, fontWeight: FontWeight.bold))
+                : const SizedBox(),
+          ),
+        ),
+      ],
+    );
+  }
+
+  // ... (이하 _buildLockedUI, _selectAnswer 등 기존 함수들 유지) ...
+  
+  Widget _buildLockedUI() {
+    return Center(
+      child: Column(
+        mainAxisAlignment: MainAxisAlignment.center,
+        children: [
+          Icon(
+            _mySelectedAnswer == "O" ? Icons.circle_outlined : Icons.close,
+            size: 80,
+            color: _mySelectedAnswer == "O" ? Colors.blue : Colors.red,
+          ),
+          const SizedBox(height: 20),
+          const Text("제출 완료! 결과를 기다리는 중...", style: TextStyle(fontSize: 20, color: Colors.grey)),
+        ],
+      ),
+    );
+  }
+
+  void _selectAnswer(String answer) {
+    _lockInTimer?.cancel();
+    _mySelectedAnswer = answer;
+    SoundManager().playSfx(SoundKey.click);
+    _updateLocalState({'type': 'UI_REFRESH'}); 
+
+    _lockInTimer = Timer(const Duration(seconds: 3), () {
+      _submitFinalAnswer();
+    });
+  }
+
+  void _submitFinalAnswer() {
+    if (_mySelectedAnswer == null) return;
+    _isLockedIn = true;
+    _updateLocalState({'type': 'UI_REFRESH'});
+
+    final payload = {
+      'type': 'ANSWER_SUBMIT',
+      'answer': _mySelectedAnswer,
+      'userId': NetworkManager().me.id,
+    };
+
+    if (NetworkManager().role == NetworkRole.host) {
+      onMessageReceived("", payload);
+    } else {
+      NetworkManager().sendMessage(payload);
+    }
+  }
+  
+  void _updateLocalState(Map<String, dynamic> data) {
+    _gameStateController.add(data);
+  }
+
+  Widget _buildResultScreen(BuildContext context, String winnerName) {
+    bool amIWinner = _myStatus == PlayerStatus.winner;
+    return Center(
+      child: Column(
+        mainAxisAlignment: MainAxisAlignment.center,
+        children: [
+          Icon(amIWinner ? Icons.emoji_events : Icons.thumb_down, size: 100, color: amIWinner ? Colors.amber : Colors.grey),
+          const SizedBox(height: 20),
+          Text(amIWinner ? "우승!" : "게임 종료", style: const TextStyle(fontSize: 30, fontWeight: FontWeight.bold)),
+          const SizedBox(height: 10),
+          Text("최종 우승자: $winnerName", style: const TextStyle(fontSize: 20)),
+          const SizedBox(height: 50),
+          ElevatedButton(onPressed: () { onDispose(); Navigator.pop(context); }, child: const Text("나가기")),
+        ],
+      ),
+    );
+  }
+
+  Widget _buildWaitingScreen(String msg) => Center(child: Column(mainAxisAlignment: MainAxisAlignment.center, children: [const CircularProgressIndicator(), SizedBox(height: 20), Text(msg)]));
+
+  void _confirmExit(BuildContext context) {
+    showDialog(context: context, builder: (ctx) => AlertDialog(
+      title: const Text("게임 종료"), content: const Text("방을 폭파하시겠습니까?"),
+      actions: [
+        TextButton(onPressed: ()=>Navigator.pop(ctx), child: const Text("취소")),
+        TextButton(onPressed: () {
+          Navigator.pop(ctx);
+          NetworkManager().sendMessage({'type': 'GAME_EXIT'});
+          onDispose();
+          Navigator.pop(context);
+        }, child: const Text("종료", style: TextStyle(color: Colors.red))),
+      ]
+    ));
+  }
+}
+
+// ------------------------------------------------------------------------
+// [Widget] 현황판 (기존 코드와 동일하지만 함께 제공)
+// ------------------------------------------------------------------------
+class _PlayerStatusGrid extends StatelessWidget {
+  final Set<String> aliveUsers;
+  final Set<String> answeredUsers;
+
+  const _PlayerStatusGrid({required this.aliveUsers, required this.answeredUsers});
+
+  @override
+  Widget build(BuildContext context) {
+    final allUsers = [NetworkManager().me, ...NetworkManager().guestList];
+
+    return Container(
+      height: 90,
+      width: double.infinity,
+      padding: const EdgeInsets.all(10),
+      color: Colors.grey[100],
+      child: ListView.builder(
+        scrollDirection: Axis.horizontal,
+        itemCount: allUsers.length,
+        itemBuilder: (context, index) {
+          final user = allUsers[index];
+          final isAlive = aliveUsers.contains(user.id);
+          final isSubmitted = answeredUsers.contains(user.id);
+          final isMe = user.id == NetworkManager().me.id;
+
+          return Padding(
+            padding: const EdgeInsets.symmetric(horizontal: 8.0),
+            child: Column(
+              children: [
+                Stack(
+                  children: [
+                    Container(
+                      width: 50, height: 50,
+                      decoration: BoxDecoration(
+                        shape: BoxShape.circle,
+                        color: isAlive ? Color(user.colorValue) : Colors.grey,
+                        border: isSubmitted ? Border.all(color: Colors.green, width: 3) : null,
+                      ),
+                      child: Center(
+                        child: isAlive 
+                            ? Text(user.nickname[0], style: const TextStyle(color: Colors.white, fontWeight: FontWeight.bold))
+                            : const Icon(Icons.close, color: Colors.white),
+                      ),
+                    ),
+                    if (isMe) Positioned(top:0, right:0, child: Container(width: 10, height: 10, decoration: const BoxDecoration(color: Colors.red, shape: BoxShape.circle))),
+                  ],
+                ),
+                const SizedBox(height: 4),
+                Text(user.nickname, style: TextStyle(fontSize: 10, color: isAlive ? Colors.black : Colors.grey)),
+              ],
+            ),
+          );
+        },
+      ),
+    );
+  }
+}
+
+class _AnswerBtn extends StatelessWidget {
+  final String text;
+  final Color color;
+  final bool isSelected;
+  final VoidCallback onTap;
+  const _AnswerBtn({required this.text, required this.color, required this.isSelected, required this.onTap});
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      onTap: onTap,
+      child: AnimatedContainer(
+        duration: const Duration(milliseconds: 200),
+        width: isSelected ? 140 : 120,
+        height: isSelected ? 140 : 120,
+        decoration: BoxDecoration(
+          color: color.withOpacity(isSelected ? 1.0 : 0.6),
+          shape: BoxShape.circle, 
+          border: isSelected ? Border.all(color: Colors.white, width: 5) : null,
+          boxShadow: [BoxShadow(color: color.withOpacity(0.4), blurRadius: 10, offset: const Offset(0, 6))]
+        ),
+        child: Center(child: Text(text, style: const TextStyle(fontSize: 60, color: Colors.white, fontWeight: FontWeight.bold))),
+      ),
+    );
+  }
+}
\ No newline at end of file
diff --git a/packages/games/quiz/pubspec.yaml b/packages/games/quiz/pubspec.yaml
index 2fd809a..353e287 100644
--- a/packages/games/quiz/pubspec.yaml
+++ b/packages/games/quiz/pubspec.yaml
@@ -1,57 +1,15 @@
 name: playwith_game_quiz
-description: "A new Flutter package project."
+description: A quiz game module.
 version: 0.0.1
-homepage:
+publish_to: 'none'
 
 environment:
-  sdk: ^3.9.2
-  flutter: ">=1.17.0"
+  sdk: ^3.0.0
 
 dependencies:
   flutter:
     sdk: flutter
-  # 코어 패키지 의존성 추가
+  # Core 모듈 연결
   playwith_core:
     path: ../../core
-
-dev_dependencies:
-  flutter_test:
-    sdk: flutter
-  flutter_lints: ^5.0.0
-
-# For information on the generic Dart part of this file, see the
-# following page: https://dart.dev/tools/pub/pubspec
-
-# The following section is specific to Flutter packages.
-flutter:
-
-  # To add assets to your package, add an assets section, like this:
-  # assets:
-  #   - images/a_dot_burr.jpeg
-  #   - images/a_dot_ham.jpeg
-  #
-  # For details regarding assets in packages, see
-  # https://flutter.dev/to/asset-from-package
-  #
-  # An image asset can refer to one or more resolution-specific "variants", see
-  # https://flutter.dev/to/resolution-aware-images
-
-  # To add custom fonts to your package, add a fonts section here,
-  # in this "flutter" section. Each entry in this list should have a
-  # "family" key with the font family name, and a "fonts" key with a
-  # list giving the asset and other descriptors for the font. For
-  # example:
-  # fonts:
-  #   - family: Schyler
-  #     fonts:
-  #       - asset: fonts/Schyler-Regular.ttf
-  #       - asset: fonts/Schyler-Italic.ttf
-  #         style: italic
-  #   - family: Trajan Pro
-  #     fonts:
-  #       - asset: fonts/TrajanPro.ttf
-  #       - asset: fonts/TrajanPro_Bold.ttf
-  #         weight: 700
-  #
-  # For details regarding fonts in packages, see
-  # https://flutter.dev/to/font-from-package
+  audioplayers: ^6.0.0  # 여기로 이동
\ No newline at end of file