feat: dark theme

Signed-off-by: Kingtous <kingtous@qq.com>

flutter/lib/desktop/pages/connection_page.dart

@@ -16,7 +16,6 @@ import '../../mobile/pages/home_page.dart';
 import '../../mobile/pages/scan_page.dart';
 import '../../mobile/pages/settings_page.dart';
 import '../../models/model.dart';
-import '../../models/peer_model.dart';
 
 enum RemoteType { recently, favorite, discovered, addressBook }
 
@@ -60,7 +59,7 @@ class _ConnectionPageState extends State<ConnectionPage> {
   Widget build(BuildContext context) {
     if (_idController.text.isEmpty) _idController.text = gFFI.getId();
     return Container(
-      decoration: BoxDecoration(color: MyTheme.grayBg),
+      decoration: BoxDecoration(color: isDarkTheme() ? null : MyTheme.grayBg),
       child: Column(
           mainAxisAlignment: MainAxisAlignment.start,
           mainAxisSize: MainAxisSize.max,
@@ -83,7 +82,6 @@ class _ConnectionPageState extends State<ConnectionPage> {
                     crossAxisAlignment: CrossAxisAlignment.start,
                     children: [
                       TabBar(
-                          labelColor: Colors.black87,
                           isScrollable: true,
                           indicatorSize: TabBarIndicatorSize.label,
                           tabs: [
@@ -205,7 +203,7 @@ class _ConnectionPageState extends State<ConnectionPage> {
       width: 500,
       padding: EdgeInsets.symmetric(horizontal: 16, vertical: 24),
       decoration: BoxDecoration(
-        color: MyTheme.white,
+        color: isDarkTheme() ? null : MyTheme.white,
         borderRadius: const BorderRadius.all(Radius.circular(13)),
       ),
       child: Ink(
@@ -235,13 +233,11 @@ class _ConnectionPageState extends State<ConnectionPage> {
                         helperStyle: TextStyle(
                           fontWeight: FontWeight.bold,
                           fontSize: 16,
-                          color: MyTheme.dark,
                         ),
                         labelStyle: TextStyle(
                           fontWeight: FontWeight.w600,
                           fontSize: 26,
                           letterSpacing: 0.2,
-                          color: MyTheme.dark,
                         ),
                       ),
                       controller: _idController,
@@ -269,7 +265,6 @@ class _ConnectionPageState extends State<ConnectionPage> {
                         translate(
                           "Transfer File",
                         ),
-                        style: TextStyle(color: MyTheme.dark),
                       ),
                     ),
                   ),
@@ -528,7 +523,6 @@ class _ConnectionPageState extends State<ConnectionPage> {
           shape: RoundedRectangleBorder(
               borderRadius: BorderRadius.circular(20),
               side: BorderSide(color: MyTheme.grayBg)),
-          color: Colors.white,
           child: Container(
             width: 200,
             height: double.infinity,

flutter/lib/desktop/pages/desktop_home_page.dart

@@ -10,6 +10,7 @@ import 'package:flutter_hbb/desktop/widgets/titlebar_widget.dart';
 import 'package:flutter_hbb/models/model.dart';
 import 'package:get/get.dart';
 import 'package:provider/provider.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 import 'package:tray_manager/tray_manager.dart';
 import 'package:url_launcher/url_launcher_string.dart';
 
@@ -64,7 +65,6 @@ class _DesktopHomePageState extends State<DesktopHomePage> with TrayListener {
     return ChangeNotifierProvider.value(
       value: gFFI.serverModel,
       child: Container(
-        decoration: BoxDecoration(color: MyTheme.white),
         child: Column(
           children: [
             buildTip(context),
@@ -339,13 +339,24 @@ class _DesktopHomePageState extends State<DesktopHomePage> with TrayListener {
     super.dispose();
   }
 
+  void changeTheme(String choice) async {
+    if (choice == "Y") {
+      Get.changeTheme(MyTheme.darkTheme);
+    } else {
+      Get.changeTheme(MyTheme.lightTheme);
+    }
+    Get.find<SharedPreferences>().setString("darkTheme", choice);
+  }
+
   void onSelectMenu(String value) {
     if (value.startsWith('enable-')) {
       final option = gFFI.getOption(value);
       gFFI.setOption(value, option == "N" ? "" : "N");
     } else if (value.startsWith('allow-')) {
       final option = gFFI.getOption(value);
-      gFFI.setOption(value, option == "Y" ? "" : "Y");
+      final choice = option == "Y" ? "" : "Y";
+      gFFI.setOption(value, choice);
+      changeTheme(choice);
     } else if (value == "stop-service") {
       final option = gFFI.getOption(value);
       gFFI.setOption(value, option == "Y" ? "" : "Y");
@@ -367,9 +378,8 @@ class _DesktopHomePageState extends State<DesktopHomePage> with TrayListener {
   }
 
   PopupMenuItem<String> genEnablePopupMenuItem(String label, String value) {
-    final isEnable = label.startsWith('enable-')
-        ? gFFI.getOption(value) != "N"
-        : gFFI.getOption(value) != "Y";
+    final v = gFFI.getOption(value);
+    final isEnable = value.startsWith('enable-') ? v != "N" : v == "Y";
     return PopupMenuItem(
       child: Row(
         children: [

flutter/lib/desktop/pages/file_manager_page.dart

@@ -72,7 +72,7 @@ class _FileManagerPageState extends State<FileManagerPage>
                 return false;
               },
               child: Scaffold(
-                backgroundColor: MyTheme.grayBg,
+                backgroundColor: isDarkTheme() ? MyTheme.dark : MyTheme.grayBg,
                 body: Row(
                   children: [
                     Flexible(flex: 3, child: body(isLocal: true)),