feat: LokiDeploy 初始提交 - 轻量级 K8s Loki 部署平台

Go(Gin) + React(Vite + shadcn/ui + Tailwind) 前后端分离，全中文 UI

- 集群管理：Kubeconfig / Token 双接入，kubectl + helm 部署
- 主机管理：SSH 密钥 / 密码双认证，CPU/内存/磁盘使用率监控，SSH 错误中文友好提示
- 存储配置、部署管理、系统设置
- Docker 镜像内置 kubectl + helm，开箱即用
- run.sh 一键启停（start/stop/restart/status）

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

frontend/src/pages/Settings.tsx

@@ -0,0 +1,131 @@
+import { useState } from 'react'
+import { KeyRound, Settings as SettingsIcon } from 'lucide-react'
+import { Button } from '@/components/ui/button'
+import { Input } from '@/components/ui/input'
+import { Label } from '@/components/ui/label'
+import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
+import { authApi } from '@/srv/api'
+
+export default function Settings() {
+  const [oldPassword, setOldPassword] = useState('')
+  const [newPassword, setNewPassword] = useState('')
+  const [confirmPassword, setConfirmPassword] = useState('')
+  const [changing, setChanging] = useState(false)
+
+  const handleChangePassword = async (e: React.FormEvent) => {
+    e.preventDefault()
+    if (newPassword !== confirmPassword) {
+      alert('两次输入的密码不一致')
+      return
+    }
+    setChanging(true)
+    try {
+      await authApi.changePassword(oldPassword, newPassword)
+      alert('密码修改成功')
+      setOldPassword('')
+      setNewPassword('')
+      setConfirmPassword('')
+    } catch (err: unknown) {
+      const message = err instanceof Error ? err.message : '密码修改失败'
+      alert(message)
+    } finally {
+      setChanging(false)
+    }
+  }
+
+  return (
+    <div className="space-y-6">
+      <div>
+        <h2 className="text-lg font-semibold text-slate-800 dark:text-white">系统设置</h2>
+        <p className="text-sm text-slate-500">修改登录密码与查看系统信息</p>
+      </div>
+
+      <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
+        {/* 修改密码 */}
+        <Card className="border-slate-200 dark:border-slate-800">
+          <CardHeader className="pb-3">
+            <CardTitle className="text-base flex items-center gap-2">
+              <KeyRound className="w-4 h-4" />
+              修改密码
+            </CardTitle>
+          </CardHeader>
+          <CardContent>
+            <form onSubmit={handleChangePassword} className="space-y-4">
+              <div className="space-y-2">
+                <Label htmlFor="old-pwd">当前密码</Label>
+                <Input
+                  id="old-pwd"
+                  type="password"
+                  value={oldPassword}
+                  onChange={(e) => setOldPassword(e.target.value)}
+                  placeholder="请输入当前密码"
+                  required
+                />
+              </div>
+              <div className="space-y-2">
+                <Label htmlFor="new-pwd">新密码</Label>
+                <Input
+                  id="new-pwd"
+                  type="password"
+                  value={newPassword}
+                  onChange={(e) => setNewPassword(e.target.value)}
+                  placeholder="请输入新密码（至少 6 位）"
+                  required
+                  minLength={6}
+                />
+              </div>
+              <div className="space-y-2">
+                <Label htmlFor="confirm-pwd">确认新密码</Label>
+                <Input
+                  id="confirm-pwd"
+                  type="password"
+                  value={confirmPassword}
+                  onChange={(e) => setConfirmPassword(e.target.value)}
+                  placeholder="请再次输入新密码"
+                  required
+                />
+              </div>
+              <Button type="submit" className="bg-emerald-600 hover:bg-emerald-700" disabled={changing}>
+                {changing ? '修改中...' : '修改密码'}
+              </Button>
+            </form>
+          </CardContent>
+        </Card>
+
+        {/* 关于 */}
+        <Card className="border-slate-200 dark:border-slate-800">
+          <CardHeader className="pb-3">
+            <CardTitle className="text-base flex items-center gap-2">
+              <SettingsIcon className="w-4 h-4" />
+              关于 LokiDeploy
+            </CardTitle>
+          </CardHeader>
+          <CardContent>
+            <div className="space-y-3">
+              <div className="flex justify-between py-2 border-b border-slate-100 dark:border-slate-800">
+                <span className="text-sm text-slate-500">版本</span>
+                <span className="text-sm font-medium">v1.0.0</span>
+              </div>
+              <div className="flex justify-between py-2 border-b border-slate-100 dark:border-slate-800">
+                <span className="text-sm text-slate-500">后端</span>
+                <span className="text-sm font-medium">Go + Gin + JSON 文件存储</span>
+              </div>
+              <div className="flex justify-between py-2 border-b border-slate-100 dark:border-slate-800">
+                <span className="text-sm text-slate-500">前端</span>
+                <span className="text-sm font-medium">React + TypeScript + Tailwind CSS</span>
+              </div>
+              <div className="flex justify-between py-2 border-b border-slate-100 dark:border-slate-800">
+                <span className="text-sm text-slate-500">部署工具</span>
+                <span className="text-sm font-medium">kubectl + helm（镜像内置）</span>
+              </div>
+              <div className="flex justify-between py-2">
+                <span className="text-sm text-slate-500">简介</span>
+                <span className="text-sm font-medium text-right">轻量级 K8s Loki 部署平台</span>
+              </div>
+            </div>
+          </CardContent>
+        </Card>
+      </div>
+    </div>
+  )
+}