feat: adaptive promo images with blurred fill

Replace cover-crop background with PromoImage component: sharp
contain image over a blurred cover copy. Whole image visible on
any aspect ratio, no flat letterbox bars. Applied to accueil,
adherent profile, backend promotions, member space preview +
upload dropzone.

Also retheme adherent logo frame (cream gradient + warm border)
instead of flat white.

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

src/app/adherents/[id]/page.tsx

@@ -5,6 +5,7 @@ import { Sparkle } from "@/components/Sparkle";
 import { SiteHeader } from "@/components/SiteHeader";
 import { SiteFooter } from "@/components/SiteFooter";
 import { VitrineImage } from "@/components/VitrineImage";
+import { PromoImage } from "@/components/PromoImage";
 import { getMemberLivePromotions, getPublicMember } from "@/lib/queries";
 
 export const dynamic = "force-dynamic";
@@ -112,8 +113,9 @@ export default async function FicheAdherentPage({
                 width: 118,
                 height: 118,
                 borderRadius: 22,
-                background: "#fff",
-                border: "4px solid #fff",
+                background: "linear-gradient(160deg, #fffdf8 0%, #f6f2e8 100%)",
+                border: "1px solid #e6dcc6",
+                outline: "4px solid #fff",
                 marginTop: -54,
                 flexShrink: 0,
                 display: "flex",
@@ -265,7 +267,8 @@ export default async function FicheAdherentPage({
               ) : (
                 promos.map((p, idx) => (
                   <article key={p.id} className="lift" style={{ border: "1px solid #ece3d0", borderRadius: 16, overflow: "hidden", marginBottom: idx === promos.length - 1 ? 0 : 14 }}>
-                    <div style={{ position: "relative", height: 120, background: p.imageUrl ? `url(${p.imageUrl})` : STRIPE_WARM, backgroundSize: "cover", backgroundPosition: "center", display: "flex", alignItems: "center", justifyContent: "center" }}>
+                    <div style={{ position: "relative", height: 120, background: STRIPE_WARM, overflow: "hidden", display: "flex", alignItems: "center", justifyContent: "center" }}>
+                      {p.imageUrl && <PromoImage src={p.imageUrl} alt={p.title} />}
                       {!p.imageUrl && (<span style={{ fontSize: 10, letterSpacing: "0.12em", color: "#a99c82", textTransform: "uppercase" }}>photo de l&apos;offre</span>)}
                       {p.badge && (
                         <span className="font-display" style={{ position: "absolute", top: 0, right: 0, background: badgeColor(p.badge), color: "#fff", fontWeight: 800, fontSize: 16, padding: "6px 13px", borderRadius: "0 0 0 14px" }}>{p.badge}</span>

src/app/backend/espace/MemberSpaceForm.tsx

@@ -3,6 +3,7 @@
 import { useRef, useState } from "react";
 import { useRouter } from "next/navigation";
 import { publishPromo } from "../actions";
+import { PromoImage } from "@/components/PromoImage";
 
 const STRIPE_WARM =
   "repeating-linear-gradient(45deg,#efe9da,#efe9da 12px,#e6ddc9 12px,#e6ddc9 24px)";
@@ -81,11 +82,10 @@ export function MemberSpaceForm({
         <label style={{ display: "block", cursor: "pointer", marginBottom: 18 }}>
           <div
             style={{
+              position: "relative",
               border: "2px dashed #d8cdb4",
               borderRadius: 14,
-              background: hasImg ? `url(${imgData})` : "#faf7ef",
-              backgroundSize: "cover",
-              backgroundPosition: "center",
+              background: "#faf7ef",
               height: 170,
               display: "flex",
               flexDirection: "column",
@@ -96,6 +96,7 @@ export function MemberSpaceForm({
               overflow: "hidden",
             }}
           >
+            {hasImg && <PromoImage src={imgData} alt="" />}
             {!hasImg && (
               <>
                 <span style={{ width: 38, height: 38, borderRadius: 10, background: "#f0e8d6", display: "flex", alignItems: "center", justifyContent: "center" }}>
@@ -188,14 +189,14 @@ export function MemberSpaceForm({
             style={{
               position: "relative",
               height: 175,
-              background: hasImg ? `url(${imgData})` : STRIPE_WARM,
-              backgroundSize: "cover",
-              backgroundPosition: "center",
+              background: STRIPE_WARM,
+              overflow: "hidden",
               display: "flex",
               alignItems: "center",
               justifyContent: "center",
             }}
           >
+            {hasImg && <PromoImage src={imgData} alt={title} />}
             {!hasImg && (
               <span style={{ fontSize: 10.5, letterSpacing: "0.12em", color: "#a99c82", textTransform: "uppercase" }}>
                 photo de l&apos;offre

src/app/backend/promotions/page.tsx

@@ -5,6 +5,7 @@ import { db } from "@/db";
 import { members, promotions } from "@/db/schema";
 import { can } from "@/lib/rbac";
 import { moderatePromo } from "../actions";
+import { PromoImage } from "@/components/PromoImage";
 
 export const dynamic = "force-dynamic";
 
@@ -75,18 +76,14 @@ export default async function PromotionsPage() {
                 style={{
                   position: "relative",
                   height: 150,
-                  background: p.imageUrl
-                    ? `url(${p.imageUrl})`
-                    : isPending
-                      ? STRIPE_COOL
-                      : STRIPE_WARM,
-                  backgroundSize: "cover",
-                  backgroundPosition: "center",
+                  background: isPending ? STRIPE_COOL : STRIPE_WARM,
+                  overflow: "hidden",
                   display: "flex",
                   alignItems: "center",
                   justifyContent: "center",
                 }}
               >
+                {p.imageUrl && <PromoImage src={p.imageUrl} alt={p.title ?? ""} />}
                 {p.category && (
                   <span style={{ position: "absolute", top: 10, left: 10, background: "#9a6638", color: "#fff", borderRadius: 999, padding: "4px 11px", fontSize: 11, fontWeight: 700 }}>
                     {p.category}

src/app/page.tsx

@@ -6,6 +6,7 @@ import { SiteFooter } from "@/components/SiteFooter";
 import { MembershipModalButton } from "@/components/MembershipModalButton";
 import { MembersCarousel } from "@/components/MembersCarousel";
 import { StarField } from "@/components/StarField";
+import { PromoImage } from "@/components/PromoImage";
 import { getLivePromotions, getRotatingActiveMembers } from "@/lib/queries";
 
 export const dynamic = "force-dynamic";
@@ -233,14 +234,14 @@ export default async function AccueilPage() {
                   style={{
                     position: "relative",
                     height: 168,
-                    background: p.imageUrl ? `url(${p.imageUrl})` : STRIPE_WARM,
-                    backgroundSize: "cover",
-                    backgroundPosition: "center",
+                    background: STRIPE_WARM,
+                    overflow: "hidden",
                     display: "flex",
                     alignItems: "center",
                     justifyContent: "center",
                   }}
                 >
+                  {p.imageUrl && <PromoImage src={p.imageUrl} alt={p.title ?? ""} />}
                   {!p.imageUrl && (
                     <span style={{ fontSize: 10.5, letterSpacing: "0.12em", color: "#a99c82", textTransform: "uppercase" }}>
                       photo de l&apos;offre

src/components/PromoImage.tsx

@@ -0,0 +1,39 @@
+/**
+ * Promo image that adapts to any aspect ratio.
+ * Sharp `contain` image on top of a blurred `cover` copy of itself,
+ * so the whole image is always visible with no flat letterbox bars.
+ * Render inside a `position: relative` box; place after it any
+ * badges/labels that must sit on top.
+ */
+export function PromoImage({ src, alt = "" }: { src: string; alt?: string }) {
+  return (
+    <>
+      <div
+        aria-hidden
+        style={{
+          position: "absolute",
+          inset: 0,
+          backgroundImage: `url(${src})`,
+          backgroundSize: "cover",
+          backgroundPosition: "center",
+          filter: "blur(18px) saturate(1.15)",
+          transform: "scale(1.18)",
+        }}
+      />
+      <div aria-hidden style={{ position: "absolute", inset: 0, background: "rgba(40,30,15,0.16)" }} />
+      {/* eslint-disable-next-line @next/next/no-img-element */}
+      <img
+        src={src}
+        alt={alt}
+        style={{
+          position: "absolute",
+          inset: 0,
+          width: "100%",
+          height: "100%",
+          objectFit: "contain",
+          display: "block",
+        }}
+      />
+    </>
+  );
+}