新增功能：

- 底部提示行改为：左对齐"请勿二次分发此软件！"+ 右对齐"设置"入口（hover 下划线+手型，与节点标签一致）
- 新增设置弹窗（风格与登录框一致），目前仅含"退出登录"：清除加密凭据与本地节点配置，下次启动/开启代理时要求重新登录

lite/proxy_lite.py

@@ -1139,21 +1139,24 @@ _NL_BASE = f"color: {C_TITLE}; font-size: 12px;"
 _NL_HOVER = _NL_BASE + " text-decoration: underline;"
 
 class NodeLabel(QLabel):
-    """节点标签：hover 显示下划线+手型光标，点击发出 clicked 信号。"""
+    """可点击标签：hover 显示下划线+手型光标，点击发出 clicked 信号。"""
     clicked = pyqtSignal()
 
-    def __init__(self, text=""):
+    def __init__(self, text="", tooltip="点击切换节点", base=None, hover=None):
         super().__init__(text)
-        self.setStyleSheet(_NL_BASE)
+        self._base = base or _NL_BASE
-        self.setToolTip("点击切换节点")
+        self._hover = hover or self._base + " text-decoration: underline;"
+        self.setStyleSheet(self._base)
+        if tooltip:
+            self.setToolTip(tooltip)
 
     def enterEvent(self, e):
-        self.setStyleSheet(_NL_HOVER)
+        self.setStyleSheet(self._hover)
         self.setCursor(Qt.PointingHandCursor)
         super().enterEvent(e)
 
     def leaveEvent(self, e):
-        self.setStyleSheet(_NL_BASE)
+        self.setStyleSheet(self._base)
         self.unsetCursor()
         super().leaveEvent(e)
 
@@ -1309,6 +1312,57 @@ class LoginDialog(QDialog):
             self.lb_err.setText(info)
             self.lb_err.show()
 
+# ── 设置弹窗 ─────────────────────────────────────────
+
+class SettingsDialog(QDialog):
+    """设置弹窗（当前仅含退出登录：清除凭据与本地节点配置）。"""
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self.setWindowTitle("设置")
+        self.setWindowIcon(load_icon())
+        self.setFixedSize(280, 150)
+        self.setStyleSheet(f"""
+            QDialog {{ background-color: {C_BG}; }}
+            QLabel {{ color: {C_TEXT}; font-family: "Microsoft YaHei", "Segoe UI", sans-serif; font-size: 12px; }}
+        """)
+
+        layout = QVBoxLayout(self)
+        layout.setSpacing(12)
+        layout.setContentsMargins(20, 16, 20, 16)
+
+        title = QLabel("设置")
+        title.setStyleSheet(f"color: {C_TITLE}; font-size: 15px; font-weight: bold;")
+        title.setAlignment(Qt.AlignCenter)
+        layout.addWidget(title)
+
+        btn_logout = QPushButton("退出登录")
+        btn_logout.setStyleSheet(f"""
+            QPushButton {{
+                background-color: {C_CARD}; color: {C_RED};
+                border: 1px solid {C_RED}; border-radius: 6px;
+                padding: 7px 16px; font-size: 13px;
+            }}
+            QPushButton:hover {{ background-color: #ffecec; }}
+        """)
+        btn_logout.setToolTip("清除登录凭据与本地节点配置，下次启动需重新登录")
+        btn_logout.clicked.connect(self._logout)
+        layout.addWidget(btn_logout)
+
+        layout.addStretch()
+
+    def _logout(self):
+        """退出登录：删除加密凭据与本地节点配置，清空内存缓存。"""
+        global _NODES
+        for name in ("auth.json", "nodes.json"):
+            try:
+                (_USER_DIR / name).unlink(missing_ok=True)
+            except Exception:
+                pass
+        _NODES = None
+        log("已退出登录：凭据与节点配置已清除，下次启动或开启代理时需重新登录")
+        self.accept()
+
 # ── 状态指示灯（小圆点） ───────────────────────────────
 
 class StatusDot(QLabel):
@@ -1529,10 +1583,20 @@ class MainWindow(QWidget):
         hints_layout.setContentsMargins(0, 0, 0, 0)
         hints_layout.setSpacing(1)
 
+        # 第一行：左对齐警示 + 右对齐"设置"入口
+        top_row = QHBoxLayout()
+        top_row.setContentsMargins(0, 0, 0, 0)
         warn_label = QLabel("请勿二次分发此软件！")
         warn_label.setStyleSheet(f"color: {C_RED}; font-size: 11px;")
-        warn_label.setAlignment(Qt.AlignCenter)
+        top_row.addWidget(warn_label)
-        hints_layout.addWidget(warn_label)
+        top_row.addStretch()
+        self.link_settings = NodeLabel(
+            "设置", tooltip="设置",
+            base=f"color: {C_SUBTEXT}; font-size: 11px;",
+            hover=f"color: {C_TEXT}; font-size: 11px; text-decoration: underline;")
+        self.link_settings.clicked.connect(self._show_settings_dialog)
+        top_row.addWidget(self.link_settings)
+        hints_layout.addLayout(top_row)
 
         privacy_label = QLabel("使用此软件将会收集并上报您的 IP 地址及部分设备信息")
         privacy_label.setStyleSheet("color: #c8ccd4; font-size: 9px;")
@@ -1668,6 +1732,12 @@ class MainWindow(QWidget):
             self._op_done.emit("stop", False)
 
 
+    # ── 设置 ──
+    def _show_settings_dialog(self):
+        """打开设置弹窗；退出登录后刷新节点标题。"""
+        SettingsDialog(self).exec_()
+        self._refresh_subtitle()
+
     # ── 节点登录 ──
     def _maybe_show_login(self):
         """启动时节点未配置：隐藏主窗口只显示登录框；登录成功恢复，取消则退出。"""