对话页面新增，实现最最基础的部分

pubspec.yaml

@@ -1,5 +1,5 @@
 name: mydearest
-description: "A new Flutter project."
+description: "A Live2D AI chat app (multi-platform Flutter project)."
 # The following line prevents the package from being accidentally published to
 # pub.dev using `flutter pub publish`. This is preferred for private packages.
 publish_to: 'none' # Remove this line if you wish to publish to pub.dev
@@ -31,19 +31,30 @@ dependencies:
   flutter:
     sdk: flutter
 
-  # The following adds the Cupertino Icons font to your application.
-  # Use with the CupertinoIcons class for iOS style icons.
+  # UI / state
   cupertino_icons: ^1.0.8
+  get: ^4.7.3
+
+  # Networking
+  dio: ^5.2.0
+  web_socket_channel: ^2.3.0
+
+  # Chat UI
+  flutter_chat_core: ^2.9.0
+  flutter_chat_ui: ^2.11.1
+
+  # Live2D via WebView
+  webview_flutter: ^4.0.7
+
+  # Local storage
+  hive: ^2.2.3
+  hive_flutter: ^1.1.0
+  path_provider: ^2.0.15
+  shared_preferences: ^2.1.1
 
 dev_dependencies:
   flutter_test:
     sdk: flutter
-
-  # The "flutter_lints" package below contains a set of recommended lints to
-  # encourage good coding practices. The lint set provided by the package is
-  # activated in the `analysis_options.yaml` file located at the root of your
-  # package. See that file for information about deactivating specific lint
-  # rules and activating additional ones.
   flutter_lints: ^5.0.0
 
 # For information on the generic Dart part of this file, see the
@@ -64,6 +75,8 @@ flutter:
   assets:
     - lib/assets/images/
     - lib/assets/icons/
+    - assets/web/
+    - assets/live2d/
 
   # An image asset can refer to one or more resolution-specific "variants", see
   # https://flutter.dev/to/resolution-aware-images