feat(product): mobile redesign — brand below image, floating back, circular colors

Per design feedback, restructure the mobile product page (desktop layout
unchanged except color swatches):
- remove the top seller bar; the seller/brand (logo + name + ارسال پیام)
  now sits in a row below the gallery.
- add a floating circular back button over the image (safe-area aware).
- move the rating out of the action row into a prominent body row, shown
  only when the average rating is > 0.
- color swatches are now circles with a selection ring (shared with
  desktop for consistency) instead of squares.
- make the افزودن به سبد خرید button full-width/taller with a compact
  price beside it.
- the action row keeps save / share / add-to-collection / try-on.
- the red discount icon is kept as-is.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/components/product/BottomBar.tsx

@@ -62,8 +62,8 @@ interface AddToCartButtonProps {
 const AddToCartButton = ({ isOutOfStock, onClick }: AddToCartButtonProps) => (
   <Button
     variant="dark"
-    size="lg"
-    className="font-bold flex items-center gap-2 bg-VITROWN_BLUE text-white"
+    size="xl"
+    className="flex-1 h-[52px] rounded-[14px] text-B14 font-bold flex items-center justify-center gap-2 bg-VITROWN_BLUE text-white"
     disabled={isOutOfStock}
     onClick={onClick}
   >
@@ -71,7 +71,7 @@ const AddToCartButton = ({ isOutOfStock, onClick }: AddToCartButtonProps) => (
       <span className="text-B14 font-bold">ناموجود</span>
     ) : (
       <>
-        <ShoppingCart size={24} />
+        <ShoppingCart size={22} />
         افزودن به سبد خرید
       </>
     )}
@@ -194,19 +194,12 @@ export const BottomBar = ({
 
   return (
     <>
-      <div className="max-w-md mx-auto fixed gap-2 bottom-[calc(50px+env(safe-area-inset-bottom))] left-0 right-0 border-t border-inner-border bg-WHITE p-4 z-50 flex flex-row lg:static lg:max-w-none lg:mx-0 lg:border lg:rounded-xl lg:mt-6 lg:z-auto">
-        <div className="flex w-full items-center justify-between">
-          <div className="flex flex-col gap-1">
-            <AddToCartButton
-              isOutOfStock={isOutOfStock}
-              onClick={handleAddToCart}
-            />
-          </div>
-          <PriceDisplay
-            currentPrice={currentPrice}
-            currentDiscountPrice={currentDiscountPrice}
-          />
-        </div>
+      <div className="max-w-md mx-auto fixed gap-3 items-center bottom-[calc(50px+env(safe-area-inset-bottom))] left-0 right-0 border-t border-inner-border bg-WHITE p-4 z-50 flex flex-row lg:static lg:max-w-none lg:mx-0 lg:border lg:rounded-xl lg:mt-6 lg:z-auto">
+        <PriceDisplay
+          currentPrice={currentPrice}
+          currentDiscountPrice={currentDiscountPrice}
+        />
+        <AddToCartButton isOutOfStock={isOutOfStock} onClick={handleAddToCart} />
       </div>
 
       <CartDrawer

app/components/product/ColorSelector.tsx

@@ -1,5 +1,3 @@
-import { Check } from "lucide-react";
-
 interface ColorSelectorProps {
   colors: string[] | undefined;
   selectedColor: string | null;
@@ -12,24 +10,23 @@ export const ColorSelector = ({
   setSelectedColor,
 }: ColorSelectorProps) => {
   return (
-    <div className="flex flex-col gap-4 mt-10 px-4">
+    <div className="flex flex-col gap-4 mt-10 px-4 lg:px-0">
       <p className="text-B18 font-bold">انتخاب رنگ</p>
       <div className="gap-4 flex">
         {colors?.map((enColor: string, index: number) => {
+          const isSelected = selectedColor === enColor;
           return (
-            <div
+            <button
               key={index}
-              className="w-10 border h-10 rounded-md flex items-center justify-center"
+              type="button"
+              aria-label={`رنگ ${index + 1}`}
+              aria-pressed={isSelected}
+              className={`w-9 h-9 rounded-full border-2 border-WHITE transition-shadow ring-offset-2 ring-offset-WHITE ${
+                isSelected ? "ring-2 ring-BLACK" : "ring-1 ring-WHITE3"
+              }`}
               style={{ backgroundColor: enColor }}
               onClick={() => setSelectedColor(enColor)}
-              onKeyDown={() => {}}
-              role="button"
-              tabIndex={0}
-            >
-              {selectedColor === enColor && (
-                <Check size={24} className="text-WHITE" />
-              )}
-            </div>
+            />
           );
         })}
       </div>

app/components/product/ProductActions.tsx

@@ -4,7 +4,6 @@ import {
   MessageSquare,
   Send,
   Share2,
-  Star,
   X,
   Loader2,
   Copy,
@@ -20,8 +19,6 @@ import {
 } from "~/components/ui/drawer";
 import { Skeleton } from "~/components/ui/skeleton";
 import {
-  useServiceGetProductRating,
-  useServiceGetComments,
   useServiceBookmarkProduct,
   useServiceDeleteBookmark,
   useServiceCheckBookmark,
@@ -62,9 +59,6 @@ export const ProductActions = ({ productId }: { productId: string }) => {
   const { toast } = useToast();
   const { user } = useRootData();
 
-  const { data: ratingData, isLoading: ratingLoading } =
-    useServiceGetProductRating(productId || "");
-  const { data: commentsData } = useServiceGetComments(1, productId || "");
   const { data: bookmarkData, isLoading: isCheckingBookmark } =
     useServiceCheckBookmark(productId || "");
   const { mutate: bookmarkProduct, isPending: isBookmarking } =
@@ -73,8 +67,6 @@ export const ProductActions = ({ productId }: { productId: string }) => {
     useServiceDeleteBookmark();
 
   const isBookmarked = bookmarkData?.bookmarked === true;
-  const averageRating = ratingData?.averageRating || 0;
-  const commentCount = commentsData?.count || 0;
 
   const handleBookmark = () => {
     // Check if user is logged in
@@ -165,7 +157,7 @@ export const ProductActions = ({ productId }: { productId: string }) => {
 
   return (
     <>
-      <div className="flex w-full mt-4 px-4 justify-between lg:mt-0 lg:px-0">
+      <div className="flex w-full mt-4 px-4 lg:mt-0 lg:px-0">
         <div className="flex gap-8 lg:gap-2.5">
           <button
             type="button"
@@ -237,17 +229,6 @@ export const ProductActions = ({ productId }: { productId: string }) => {
             )}
           </div>
         </div>
-        <div className="flex gap-3 items-center">
-          <div className="flex gap-1 items-center">
-            {!ratingLoading && averageRating > 0 && (
-              <>
-                <p className="text-B12 font-bold text-GRAY">({commentCount})</p>
-                <p className="text-B12 font-bold">{averageRating.toFixed(1)}</p>
-                <Star className="text-BLACK fill-current" size={20} />
-              </>
-            )}
-          </div>
-        </div>
       </div>
 
       <Drawer open={isShareDrawerOpen} onOpenChange={setIsShareDrawerOpen}>

app/components/product/ProductDetailView.tsx

@@ -1,6 +1,5 @@
 import { useState, useEffect, useMemo, memo } from "react";
 import {
-  ProductHeader,
   ProductImageCarousel,
   ProductActions,
   ProductInfo,
@@ -12,6 +11,7 @@ import {
 } from "./index";
 import { ProductDetail as ProductDetailType } from "../../../src/api/types";
 import {
+  ArrowRight,
   Eye,
   EyeOff,
   Heart,
@@ -37,7 +37,7 @@ import {
 } from "~/utils/RequestHandler";
 import { useAddToCart } from "~/requestHandler/use-cart-hooks";
 import { useCreateChatThread } from "~/requestHandler/use-chat-hooks";
-import { findVariantId, formatPrice } from "~/utils/helpers";
+import { findVariantId, formatPrice, safeGoBack } from "~/utils/helpers";
 import { useToast } from "~/hooks/use-toast";
 import { useRootData } from "~/hooks/use-root-data";
 import { LoginRequiredDialog } from "../LoginRequiredDialog";
@@ -325,12 +325,6 @@ export const ProductDetailView = memo(function ProductDetailView({
 
   return (
     <div className="flex flex-col pb-20 lg:max-w-[1320px] lg:mx-auto lg:w-full lg:px-8 lg:pb-12">
-      {!isOwner && (
-        <div className="lg:hidden">
-          <ProductHeader product={product} />
-        </div>
-      )}
-
       {/* Desktop breadcrumb */}
       <nav className="hidden lg:flex items-center gap-2 text-[13px] text-GRAY mt-4 mb-4">
         <Link to="/" className="hover:text-BLACK">
@@ -395,10 +389,48 @@ export const ProductDetailView = memo(function ProductDetailView({
               </button>
             </>
           )}
+          {/* Floating back button (mobile) */}
+          {!isOwner && (
+            <button
+              type="button"
+              onClick={() => safeGoBack(navigate)}
+              aria-label="بازگشت"
+              className="lg:hidden absolute z-20 right-4 w-10 h-10 rounded-full bg-WHITE/90 backdrop-blur shadow-md flex items-center justify-center text-BLACK"
+              style={{ top: "calc(env(safe-area-inset-top, 0px) + 12px)" }}
+            >
+              <ArrowRight size={22} />
+            </button>
+          )}
         </div>
 
         {/* Info */}
         <div className="flex flex-col">
+          {/* Brand row (mobile) — moved out of the top bar, sits below image */}
+          {!isOwner && product.seller?.username ? (
+            <div className="lg:hidden flex items-center gap-3 px-4 mt-4">
+              <Link
+                to={`/seller/${product.seller.username}`}
+                className="flex items-center gap-2.5 min-w-0"
+              >
+                <SellerLogo
+                  size="sm"
+                  src={product.seller?.storeLogo}
+                  alt="seller"
+                />
+                <span className="font-bold text-[14px] truncate">
+                  {product.seller.username}
+                </span>
+              </Link>
+              <button
+                type="button"
+                onClick={handleChat}
+                className="ms-auto shrink-0 h-9 px-4 rounded-full border border-BLACK text-BLACK text-[12px] font-bold flex items-center gap-1.5"
+              >
+                <MessageCircle size={16} />
+                ارسال پیام
+              </button>
+            </div>
+          ) : null}
           {/* Seller (desktop) */}
           {!isOwner && product.seller?.username ? (
             <Link
@@ -495,6 +527,28 @@ export const ProductDetailView = memo(function ProductDetailView({
             />
           </div>
 
+          {/* Mobile: rating (only when > 0) */}
+          {!isOwner && avgRating > 0 ? (
+            <div className="lg:hidden flex items-center gap-2 px-4 mt-3 text-[13px] text-BLACK2">
+              <span className="flex items-center">
+                {[1, 2, 3, 4, 5].map((i) => (
+                  <Star
+                    key={i}
+                    size={15}
+                    className={
+                      i <= Math.round(avgRating)
+                        ? "fill-BLACK text-BLACK"
+                        : "text-GRAY3"
+                    }
+                  />
+                ))}
+              </span>
+              <b className="text-BLACK">{avgRating.toFixed(1)}</b>
+              <span className="w-1 h-1 rounded-full bg-GRAY2" />
+              <span>{reviewCount} دیدگاه</span>
+            </div>
+          ) : null}
+
           {hasAnyStock ? (
             <>
               {hasColorVariants && (