style(client): toast 跟随明暗主题(1.0.25)

真相源/主题里原无 toast 定义,SnackBar 用 Material 默认黑底,明亮主题下突兀。
PangolinTheme 加 snackBarTheme:surface 底 + fg1 字 + 描边圆角(与卡片同风格)、floating,
浅色得浅 toast、深色得深 toast。自动连接的 toast 随之适配。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

client/lib/pangolin_theme.dart

@@ -289,6 +289,19 @@ class PangolinTheme {
           borderRadius: BorderRadius.circular(PangolinRadius.lg),
         ),
       ),
+      // toast / SnackBar:跟随明暗主题(surface 底 + fg1 字 + 描边圆角,与卡片同风格),
+      // 不再用 Material 默认的突兀黑底。
+      snackBarTheme: SnackBarThemeData(
+        backgroundColor: s.surface,
+        contentTextStyle: PangolinFonts.manrope(fontWeight: FontWeight.w600, fontSize: 14)
+            .copyWith(color: s.fg1),
+        behavior: SnackBarBehavior.floating,
+        elevation: 6,
+        shape: RoundedRectangleBorder(
+          side: BorderSide(color: s.border),
+          borderRadius: BorderRadius.circular(PangolinRadius.md),
+        ),
+      ),
       inputDecorationTheme: InputDecorationTheme(
         filled: true,
         fillColor: s.bg,

client/pubspec.yaml

@@ -1,7 +1,7 @@
 name: pangolin_vpn
 description: 穿山甲 · Pangolin — 极简、稳定、跨平台网络加速客户端。
 publish_to: "none"
-version: 1.0.24+25
+version: 1.0.25+26
 
 environment:
   sdk: ^3.5.0

client/windows/installer/pangolin.iss

@@ -3,7 +3,7 @@
 ; 前置: 先在 client/ 跑 `flutter build windows`(Release),产物在
 ;       ..\..\build\windows\x64\runner\Release
 #define MyAppName "穿山甲 Pangolin"
-#define MyAppVersion "1.0.24"
+#define MyAppVersion "1.0.25"
 #define MyAppPublisher "Pangolin"
 #define MyAppExeName "pangolin_vpn.exe"
 #define BuildDir "..\..\build\windows\x64\runner\Release"