feat(ui): refine post interaction surfaces

app/(main)/post/new/page.tsx

@@ -126,9 +126,9 @@ export default function NewPostPage() {
         返回社区
       </Link>
 
-      <Card className="hover:shadow-card-hover">
-        <CardHeader>
-          <CardTitle className="tracking-tighter leading-tight">发布帖子</CardTitle>
+      <Card className="border-border/80 shadow-sm">
+        <CardHeader className="border-b border-border/60">
+          <CardTitle className="tracking-tight leading-tight">发布帖子</CardTitle>
         </CardHeader>
         <CardContent>
           <form onSubmit={handleSubmit(onSubmit)} className="space-y-6">
@@ -186,17 +186,18 @@ export default function NewPostPage() {
                 {imageFiles.map((file) => (
                   <div
                     key={`${file.name}-${file.lastModified}-${file.size}`}
-                    className="h-20 w-20 rounded-lg bg-muted flex items-center justify-center relative"
+                    className="relative flex h-20 w-20 items-center justify-center rounded-lg border border-border/60 bg-muted/30"
                   >
                     <span className="max-w-16 truncate text-xs text-muted-foreground">
                       {file.name}
                     </span>
                     <button
                       type="button"
+                      aria-label={`移除图片 ${file.name}`}
                       onClick={() =>
                         setImageFiles((files) => files.filter((item) => item !== file))
                       }
-                      className="absolute -top-1 -right-1 h-4 w-4 rounded-full bg-destructive text-destructive-foreground flex items-center justify-center"
+                      className="absolute -right-1 -top-1 flex h-5 w-5 items-center justify-center rounded-full bg-destructive text-destructive-foreground shadow-sm"
                     >
                       <X className="h-3 w-3" />
                     </button>
@@ -205,7 +206,7 @@ export default function NewPostPage() {
                 {imageFiles.length < 9 && (
                   <Label
                     htmlFor="post-images"
-                    className="h-20 w-20 cursor-pointer rounded-lg border-2 border-dashed border-muted-foreground/25 flex flex-col items-center justify-center gap-1 text-muted-foreground hover:border-muted-foreground/50 transition-colors"
+                    className="flex h-20 w-20 cursor-pointer flex-col items-center justify-center gap-1 rounded-lg border-2 border-dashed border-border/60 bg-muted/20 text-muted-foreground transition-colors hover:border-primary/60 hover:bg-muted/30 hover:text-foreground"
                   >
                     <ImagePlus className="h-5 w-5" />
                     <span className="text-[10px]">添加</span>
@@ -229,7 +230,7 @@ export default function NewPostPage() {
                   <Badge
                     key={tag}
                     variant={selectedTags.includes(tag) ? "default" : "outline"}
-                    className="cursor-pointer"
+                    className="cursor-pointer border-border/60"
                     onClick={() => toggleTag(tag)}
                   >
                     {tag}
@@ -246,7 +247,7 @@ export default function NewPostPage() {
               >
                 {isSubmitting ? "发布中..." : "发布"}
               </Button>
-              <Button type="button" variant="outline" asChild>
+              <Button type="button" variant="outline" className="border-border/60" asChild>
                 <Link href="/community">取消</Link>
               </Button>
             </div>

components/post-comments.tsx

@@ -5,10 +5,11 @@ import { toApiError } from "@/lib/errors"
 import { notifyInfo } from "@/lib/toast"
 import type { Comment } from "@/lib/types"
 import { useRequireAuth } from "@/lib/use-require-auth"
-import { Heart } from "lucide-react"
+import { AlertCircle, Heart, MessageCircle } from "lucide-react"
 import { useCallback, useEffect, useState } from "react"
 import { Avatar, AvatarFallback, AvatarImage } from "./ui/avatar"
 import { Button } from "./ui/button"
+import { EmptyState } from "./ui/empty-state"
 import { Textarea } from "./ui/textarea"
 
 interface PostCommentsProps {
@@ -65,12 +66,15 @@ export function PostComments({ postId }: PostCommentsProps) {
 
   return (
     <div className="space-y-4">
-      <h2 className="font-semibold">
-        评论 ({loading && comments.length === 0 ? "..." : comments.length})
-      </h2>
+      <div className="flex items-center justify-between border-b border-border/60 pb-3">
+        <h2 className="font-semibold">评论</h2>
+        <span className="text-xs text-muted-foreground">
+          {loading && comments.length === 0 ? "加载中" : `${comments.length} 条`}
+        </span>
+      </div>
 
       <form
-        className="flex gap-3"
+        className="space-y-3 rounded-xl border border-border/80 bg-card p-3 shadow-sm"
         onSubmit={(event) => {
           event.preventDefault()
           requireAuth(async () => {
@@ -95,42 +99,58 @@ export function PostComments({ postId }: PostCommentsProps) {
       >
         <Textarea
           placeholder="写下你的评论..."
-          className="flex-1"
+          className="min-h-20 resize-none bg-transparent"
           rows={2}
           value={content}
           onChange={(event) => setContent(event.target.value)}
         />
-        <Button className="self-end" disabled={!content.trim() || submitting}>
-          发送
-        </Button>
+        <div className="flex justify-end">
+          <Button size="sm" disabled={!content.trim() || submitting}>
+            发送
+          </Button>
+        </div>
       </form>
 
       {loading && comments.length === 0 ? (
-        <p className="text-sm text-muted-foreground text-center py-8">加载中...</p>
+        <EmptyState title="评论加载中" icon={MessageCircle} className="min-h-[180px]" />
       ) : loadError ? (
-        <p className="text-sm text-muted-foreground text-center py-8">加载失败：{loadError}</p>
+        <EmptyState
+          title="评论加载失败"
+          description={loadError}
+          icon={AlertCircle}
+          className="min-h-[180px]"
+        />
       ) : comments.length === 0 ? (
-        <p className="text-sm text-muted-foreground text-center py-8">还没有评论</p>
+        <EmptyState
+          title="还没有评论"
+          description="可以写下第一条评论。"
+          icon={MessageCircle}
+          className="min-h-[180px] border-dashed"
+        />
       ) : (
-        <div className="space-y-4">
+        <div className="overflow-hidden rounded-xl border border-border/80 bg-card shadow-sm">
           {comments.map((comment) => (
-            <div key={comment.id} className="flex gap-3">
+            <div
+              key={comment.id}
+              className="flex gap-3 border-b border-border/60 p-4 last:border-0"
+            >
               <Avatar className="h-8 w-8">
                 <AvatarImage src={comment.author.avatar} />
                 <AvatarFallback>{comment.author.nickname[0]}</AvatarFallback>
               </Avatar>
-              <div className="flex-1 min-w-0">
-                <div className="flex items-center gap-2 mb-0.5">
+              <div className="min-w-0 flex-1">
+                <div className="mb-0.5 flex items-center gap-2">
                   <span className="text-sm font-medium">{comment.author.nickname}</span>
                   <span className="text-xs text-muted-foreground">
                     {new Date(comment.createdAt).toLocaleString("zh-CN")}
                   </span>
                 </div>
-                <p className="text-sm">{comment.content}</p>
+                <p className="text-sm leading-relaxed">{comment.content}</p>
                 <button
                   type="button"
+                  aria-label={comment.liked ? "取消点赞评论" : "点赞评论"}
                   disabled={pendingLike[comment.id]}
-                  className="flex items-center gap-1 text-xs text-muted-foreground hover:text-foreground mt-1 transition-colors"
+                  className="mt-2 flex items-center gap-1 text-xs text-muted-foreground transition-colors hover:text-foreground disabled:pointer-events-none disabled:opacity-60"
                   onClick={() =>
                     requireAuth(() => {
                       if (pendingLike[comment.id]) return
@@ -177,7 +197,7 @@ export function PostComments({ postId }: PostCommentsProps) {
                   }
                 >
                   <Heart
-                    className={`h-3 w-3 ${comment.liked ? "fill-red-500 text-red-500" : ""}`}
+                    className={`h-3 w-3 ${comment.liked ? "fill-destructive text-destructive" : ""}`}
                   />
                   {comment.likeCount}
                 </button>

components/post-like-button.tsx

@@ -22,8 +22,9 @@ export function PostLikeButton({ postId, initialLiked, initialLikeCount }: PostL
   return (
     <button
       type="button"
+      aria-label={liked ? "取消点赞帖子" : "点赞帖子"}
       disabled={pending}
-      className="flex items-center gap-1 hover:text-foreground transition-colors disabled:opacity-60 disabled:pointer-events-none"
+      className="flex items-center gap-1 text-muted-foreground transition-colors hover:text-foreground disabled:pointer-events-none disabled:opacity-60"
       onClick={() =>
         requireAuth(() => {
           if (pending) return
@@ -52,7 +53,7 @@ export function PostLikeButton({ postId, initialLiked, initialLikeCount }: PostL
         })
       }
     >
-      <Heart className={`h-4 w-4 ${liked ? "fill-red-500 text-red-500" : ""}`} />
+      <Heart className={`h-4 w-4 ${liked ? "fill-destructive text-destructive" : ""}`} />
       {likeCount}
     </button>
   )