feat: UI redesign — polished layout, modal, nav, profile

- CSS: refined shadows with border ring, dark bg #0A0A0A, larger card
  radius (16/22px), modal-backdrop blur, scrollbar styling, new
  dropzone + profile-grid CSS classes
- Navbar: paw emoji logo, labels under icons, accent gradient bar,
  active-state ring on avatar
- Login / Register: auth card with decorative background blobs,
  form wrapped in card, cleaner spacing
- CatModal: two-column layout on desktop (photo left, info right),
  modal-backdrop blur, comment input with user avatar, like label
- ProfilePage: 88px avatar with camera overlay, inline stat bar with
  icons, grid section divider, Stat helper component
- CatCard: points badge in header (amber), caption text secondary
  color, ring on avatar
- FeedSidebar: color-coded rank badges, hover rows, star icon
- UploadPage: new dropzone-idle/dropzone-active CSS classes,
  filename chip on preview, UserAvatar in caption row, HEIC/AVIF in
  accepted formats hint, 500-char counter

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

client/src/pages/UploadPage.tsx

@@ -5,9 +5,11 @@ import { useUploadCat } from '@/hooks/useCats';
 import { useAuth } from '@/hooks/useAuth';
 import { useToast } from '@/components/Toast';
 import { Button } from '@/components/ui/button';
-import { Avatar, AvatarFallback } from '@/components/ui/avatar';
+import UserAvatar from '@/components/UserAvatar';
 import { ArrowLeft, Upload, X, ImagePlus } from 'lucide-react';
 
+const ACCEPTED_FORMATS = 'JPG, PNG, GIF, WebP, HEIC, AVIF';
+
 export default function UploadPage() {
   const navigate = useNavigate();
   const { user, updateUser } = useAuth();
@@ -19,91 +21,147 @@ export default function UploadPage() {
 
   const onDrop = useCallback((accepted: File[]) => {
     const f = accepted[0];
-    if (f) { setFile(f); if (preview) URL.revokeObjectURL(preview); setPreview(URL.createObjectURL(f)); }
+    if (f) {
+      setFile(f);
+      if (preview) URL.revokeObjectURL(preview);
+      setPreview(URL.createObjectURL(f));
+    }
   }, [preview]);
 
   const { getRootProps, getInputProps, isDragActive } = useDropzone({
-    onDrop, accept: { 'image/*': ['.jpg', '.jpeg', '.png', '.gif', '.webp'] }, maxFiles: 1, maxSize: 10 * 1024 * 1024,
+    onDrop,
+    accept: {
+      'image/*': ['.jpg', '.jpeg', '.png', '.gif', '.webp', '.heic', '.heif', '.avif'],
+    },
+    maxFiles: 1,
+    maxSize: 20 * 1024 * 1024,
   });
 
   const handleUpload = async () => {
     if (!file) return;
     const fd = new FormData();
-    fd.append('image', file); fd.append('caption', caption);
+    fd.append('image', file);
+    fd.append('caption', caption);
     try {
       const result = await uploadMutation.mutateAsync(fd);
       if (user) updateUser({ ...user, points: (user.points || 0) + 1 });
-      toast('+1 🎉');
+      toast('+1 балл 🎉');
       navigate(`/cat/${result.cat.id}`);
-    } catch { toast('Ошибка загрузки', 'error'); }
+    } catch (err: any) {
+      toast(err?.response?.data?.error || 'Ошибка загрузки', 'error');
+    }
   };
 
-  const clearFile = () => { setFile(null); if (preview) URL.revokeObjectURL(preview); setPreview(null); };
+  const clearFile = () => {
+    setFile(null);
+    if (preview) URL.revokeObjectURL(preview);
+    setPreview(null);
+  };
 
   return (
     <div className="mx-auto max-w-[520px] px-5 py-6">
-      <button onClick={() => navigate(-1)}
-        className="mb-6 flex items-center gap-1.5 text-xs text-[var(--fg-tertiary)] hover:text-[var(--fg)] transition-colors">
-        <ArrowLeft className="h-4 w-4" strokeWidth={1.5} /> Назад
+      <button
+        onClick={() => navigate(-1)}
+        className="mb-6 flex items-center gap-1.5 text-xs text-[var(--fg-tertiary)] hover:text-[var(--fg)] transition-colors"
+      >
+        <ArrowLeft className="h-4 w-4" strokeWidth={1.5} />
+        Назад
       </button>
 
-      <h1 className="text-xl font-800 tracking-tight mb-6">Новая публикация</h1>
+      <h1 className="text-xl font-extrabold tracking-tight mb-6">Новая публикация</h1>
 
       {!preview ? (
-        <div {...getRootProps()}
-          className={`border-2 border-dashed rounded-2xl p-16 text-center cursor-pointer transition-all bg-[var(--surface)] ${
-            isDragActive ? 'border-[var(--accent)] bg-[var(--accent-light)] scale-[1.01]' : 'border-[var(--border)] hover:border-[var(--fg-tertiary)] hover:bg-[var(--surface-hover)]'
-          }`}>
+        <div
+          {...getRootProps()}
+          className={`dropzone-idle text-center p-16 ${isDragActive ? 'dropzone-active' : ''}`}
+        >
           <input {...getInputProps()} />
-          <div className="mb-5 flex justify-center">
-            <div className="h-14 w-14 rounded-2xl bg-[var(--accent-light)] flex items-center justify-center">
-              <ImagePlus className="h-6 w-6 text-[var(--accent)]" strokeWidth={1.5} />
+          <div className="flex justify-center mb-5">
+            <div className={`h-16 w-16 rounded-2xl flex items-center justify-center transition-colors ${
+              isDragActive ? 'bg-[var(--accent)] text-white' : 'bg-[var(--accent-light)] text-[var(--accent)]'
+            }`}>
+              <ImagePlus className="h-7 w-7" strokeWidth={1.5} />
             </div>
           </div>
-          <p className="text-sm font-semibold mb-1">{isDragActive ? 'Отпустите фото' : 'Перетащите фото сюда'}</p>
-          <p className="text-xs text-[var(--fg-tertiary)] mb-5">или нажмите, чтобы выбрать файл</p>
-          <Button variant="outline" size="sm" className="rounded-xl text-xs px-5 h-9">Выбрать файл</Button>
-          <p className="mt-4 text-[10px] text-[var(--fg-tertiary)] tracking-wide">JPG, PNG, GIF, WebP · до 10 МБ</p>
+          <p className="text-sm font-semibold mb-1.5">
+            {isDragActive ? 'Отпустите фото здесь' : 'Перетащите фото сюда'}
+          </p>
+          <p className="text-xs text-[var(--fg-tertiary)] mb-6">
+            или нажмите, чтобы выбрать файл
+          </p>
+          <Button variant="outline" size="sm" className="rounded-xl text-xs px-6 h-9">
+            Выбрать файл
+          </Button>
+          <p className="mt-5 text-[10px] text-[var(--fg-tertiary)] tracking-wide">
+            {ACCEPTED_FORMATS} · до 20 МБ
+          </p>
         </div>
       ) : (
         <div className="space-y-5 animate-fade-up">
-          <div className="relative bg-[var(--bg)] rounded-2xl overflow-hidden">
-            <img src={preview!} alt="Preview" className="max-h-[420px] w-full object-contain" />
-            <button onClick={clearFile}
-              className="absolute right-3 top-3 flex h-8 w-8 items-center justify-center rounded-xl bg-black/40 text-white hover:bg-black/60 transition-all">
+          {/* Превью */}
+          <div className="relative bg-[var(--bg)] rounded-2xl overflow-hidden shadow-sm">
+            <img
+              src={preview}
+              alt="Preview"
+              className="max-h-[440px] w-full object-contain"
+            />
+            <button
+              onClick={clearFile}
+              className="absolute right-3 top-3 h-8 w-8 flex items-center justify-center rounded-xl bg-black/50 text-white hover:bg-black/70 transition-all backdrop-blur-sm"
+            >
               <X className="h-4 w-4" strokeWidth={2} />
             </button>
+            {file && (
+              <div className="absolute bottom-3 left-3 px-2.5 py-1 rounded-lg bg-black/50 text-white text-[10px] font-medium backdrop-blur-sm">
+                {file.name}
+              </div>
+            )}
           </div>
 
-          <div className="flex items-start gap-3">
-            <Avatar className="h-9 w-9 shrink-0">
-              <AvatarFallback className="text-xs avatar-colored bg-[var(--accent)]">
-                {user?.username?.charAt(0).toUpperCase() || '?'}
-              </AvatarFallback>
-            </Avatar>
+          {/* Подпись */}
+          <div className="card p-4 flex items-start gap-3">
+            <UserAvatar
+              avatarUrl={user?.avatar_url}
+              username={user?.username || '?'}
+              className="h-9 w-9 shrink-0"
+              fallbackClassName="text-xs avatar-colored bg-[var(--accent)]"
+            />
             <div className="flex-1">
-              <p className="text-sm font-semibold mb-1">{user?.username}</p>
-              <textarea placeholder="Подпись..." value={caption} onChange={e => setCaption(e.target.value)}
-                maxLength={200} rows={3}
-                className="w-full resize-none text-sm bg-transparent outline-none placeholder:text-[var(--fg-tertiary)] leading-[1.5]" />
+              <p className="text-sm font-semibold mb-1.5">@{user?.username}</p>
+              <textarea
+                placeholder="Добавьте подпись..."
+                value={caption}
+                onChange={e => setCaption(e.target.value)}
+                maxLength={500}
+                rows={3}
+                className="w-full resize-none text-sm bg-transparent outline-none placeholder:text-[var(--fg-tertiary)] leading-relaxed"
+              />
               <div className="flex justify-end mt-1">
-                <span className="text-[10px] text-[var(--fg-tertiary)] stat-value">{caption.length}/200</span>
+                <span className={`text-[10px] stat-value ${caption.length > 450 ? 'text-[var(--danger)]' : 'text-[var(--fg-tertiary)]'}`}>
+                  {caption.length}/500
+                </span>
               </div>
             </div>
           </div>
 
           <div className="divider" />
 
-          <div className="flex items-center justify-between pt-1">
-            <span className="text-xs text-[var(--fg-tertiary)] flex items-center gap-1">
-              <Upload className="h-3 w-3" strokeWidth={1.5} /> +1 балл
+          {/* Публикация */}
+          <div className="flex items-center justify-between">
+            <span className="text-xs text-[var(--fg-tertiary)] flex items-center gap-1.5 bg-[var(--accent-light)] text-[var(--accent)] px-3 py-1.5 rounded-full font-semibold">
+              <Upload className="h-3 w-3" strokeWidth={1.5} />
+              +1 балл
             </span>
-            <Button onClick={handleUpload} disabled={uploadMutation.isPending}
-              size="sm" className="rounded-xl text-sm px-6 h-10 bg-[var(--accent)] hover:bg-[var(--accent-hover)] text-white disabled:opacity-60">
+            <Button
+              onClick={handleUpload}
+              disabled={uploadMutation.isPending}
+              size="sm"
+              className="rounded-xl text-sm px-7 h-10 bg-[var(--accent)] hover:bg-[var(--accent-hover)] text-white disabled:opacity-60 shadow-sm"
+            >
               {uploadMutation.isPending ? (
                 <span className="flex items-center gap-2">
                   <span className="h-4 w-4 rounded-full border-2 border-white/30 border-t-white animate-spin" />
-                  Публикация...
+                  Публикуем...
                 </span>
               ) : 'Опубликовать'}
             </Button>
@@ -118,4 +176,4 @@ export default function UploadPage() {
       )}
     </div>
   );
-}
+}