style(AppLayout): 调整标签和按钮样式以改善布局

style(Channels): 修改渠道标识文本样式以提升可读性
style(Dashboard): 优化描述文本顺序以增强表达效果

frontend/src/components/layout/AppLayout.tsx

@@ -120,7 +120,7 @@ export function AppLayout({ children }: AppLayoutProps) {
           <form onSubmit={handleAuthSubmit}>
             <div className="space-y-4">
               <div className="space-y-2">
-                <Label htmlFor="adminToken">管理员令牌</Label>
+                <Label className="block" htmlFor="adminToken">管理员令牌</Label>
                 <Input
                   id="adminToken"
                   type="password"
@@ -138,11 +138,12 @@ export function AppLayout({ children }: AppLayoutProps) {
               )}
             </div>
 
-            <DialogFooter className="mt-6">
+            <DialogFooter className="mt-6 gap-2">
               <Button
                 type="button"
                 variant="outline"
                 onClick={closeAuthModal}
+                className='mr-0'
               >
                 取消
               </Button>

frontend/src/pages/Channels.tsx

@@ -731,8 +731,8 @@ export function Channels() {
         <div className="space-y-6">
           <Card>
             <CardContent className="p-5">
-              <h3 className="font-medium mb-4">渠道标识</h3>
-              <p className="text-sm text-muted-foreground mb-3">用于内部识别的唯一标识</p>
+              <h3 className="font-medium">渠道标识</h3>
+              <p className="text-sm text-muted-foreground mb-4">用于内部识别的唯一标识</p>
               <Input
                 value={channelKey}
                 onChange={(e) => setChannelKey(e.target.value)}

frontend/src/pages/Dashboard.tsx

@@ -65,7 +65,7 @@ export function Dashboard() {
               </span>
             </h1>
             <p className="text-lg md:text-xl text-muted-foreground leading-relaxed mb-8 max-w-2xl">
-              基于 Cloudflare Workers<br/>分布式、高性能、低延迟的 AI 统一网关
+              基于 Cloudflare Workers<br/>分布式、低延迟、高性能的 AI 统一网关
             </p>
             <div className="flex flex-wrap gap-3">
               <Button