feat(lite): add opt-in tun ipv6 mode

lite/rrpp_ui/dialogs.py

@@ -933,6 +933,7 @@ class SettingsServices:
     get_port: object
     get_system_pac: object
     get_dns: object
+    get_ipv6_enabled: object
     get_update_via_proxy: object
     get_skip_update_check: object
     get_node_display_mode: object
@@ -941,6 +942,7 @@ class SettingsServices:
     set_port: object
     set_system_pac: object
     set_dns: object
+    set_ipv6_enabled: object
     set_update_via_proxy: object
     set_skip_update_check: object
     set_node_display_mode: object
@@ -1114,6 +1116,18 @@ class SettingsDialog(QDialog):
         dns_row.addWidget(self.ed_dns)
         left_col.addLayout(dns_row)
 
+        ipv6_row = QHBoxLayout()
+        ipv6_label = QLabel("启用 IPv6 模式 (虚拟网卡)")
+        ipv6_label.setStyleSheet(f"color: {C_SUBTEXT}; font-size: 12px;")
+        ipv6_label.setToolTip("TUN 模式安装 IPv6 地址和默认路由；默认关闭")
+        ipv6_row.addWidget(ipv6_label)
+        ipv6_row.addStretch()
+        get_ipv6_enabled = getattr(services, "get_ipv6_enabled", lambda: False)
+        self.cb_ipv6 = ToggleSwitch(checked=bool(get_ipv6_enabled()))
+        self.cb_ipv6.setToolTip("仅虚拟网卡模式使用；系统代理模式忽略此项")
+        ipv6_row.addWidget(self.cb_ipv6)
+        left_col.addLayout(ipv6_row)
+
         update_row = QHBoxLayout()
         update_label = QLabel("使用代理更新")
         update_label.setStyleSheet(f"color: {C_SUBTEXT}; font-size: 12px;")
@@ -1266,6 +1280,8 @@ class SettingsDialog(QDialog):
         self.ed_port.setText(str(self._services.get_port()))
         self.cb_system_pac.setChecked(self._services.get_system_pac())
         self.ed_dns.setText(", ".join(self._services.get_dns()))
+        get_ipv6_enabled = getattr(self._services, "get_ipv6_enabled", lambda: False)
+        self.cb_ipv6.setChecked(bool(get_ipv6_enabled()))
         self.cb_update_proxy.setChecked(self._services.get_update_via_proxy())
         self.cb_skip_update.setChecked(self._services.get_skip_update_check())
         self.btn_node_domain.setChecked(True)
@@ -1287,6 +1303,8 @@ class SettingsDialog(QDialog):
             return
         self._services.set_port(port)
         self._services.set_system_pac(bool(self.cb_system_pac.isChecked()))
+        set_ipv6_enabled = getattr(self._services, "set_ipv6_enabled", lambda _value: None)
+        set_ipv6_enabled(bool(self.cb_ipv6.isChecked()))
         self._services.set_update_via_proxy(bool(self.cb_update_proxy.isChecked()))
         self._services.set_skip_update_check(bool(self.cb_skip_update.isChecked()))
         self._services.set_node_display_mode(