polish(card): bigger/higher QR, theme-tinted scrim, profile-photo nudge

- QR 150->178px and moved up (bottom-right, above the identity block).
- Bottom scrim now fades into the THEME's dark background + an accent glow
  (was plain black) so the card reads as branded.
- Studio shows an 'add a profile photo' nudge when the account has no kind-0
  picture (the card's placeholder name was the tell).

src/i18n/en.ts

@@ -6385,6 +6385,8 @@ walletUi: {
       derived: 'From your Skater profile',
       noSkaterProfile: 'No Skater profile yet —',
       editSkaterProfile: 'add your styles & level',
+      noPhoto: 'No profile photo yet —',
+      addPhoto: 'add one in your profile',
       accent: 'Accent colour',
       accentHint: 'Overrides the theme accent',
       accentClear: 'Use theme colour',

src/i18n/es.ts

@@ -6385,6 +6385,8 @@ walletUi: {
       derived: 'Desde tu perfil de skater',
       noSkaterProfile: 'Aún no tienes perfil de skater —',
       editSkaterProfile: 'añade tus estilos y nivel',
+      noPhoto: 'Aún no tienes foto de perfil —',
+      addPhoto: 'añádela en tu perfil',
       accent: 'Color de acento',
       accentHint: 'Sustituye el acento del tema',
       accentClear: 'Usar color del tema',

src/lib/riderCardCanvas.ts

@@ -73,10 +73,10 @@ export interface CanvasCardData {
 
 // ─── geometry ─────────────────────────────────────────────────────────────────
 const X = 44;                 // left text margin
-const NAME_MAX = 560;         // text column width (QR sits to the right)
-const QR_SIZE = 150;
-const QR_X = CARD_W - X - QR_SIZE;   // 662
-const QR_Y = 322;
+const NAME_MAX = 548;         // text column width (QR sits to the right)
+const QR_SIZE = 178;
+const QR_X = CARD_W - X - QR_SIZE;   // 634
+const QR_Y = 232;
 
 // ─── helpers ──────────────────────────────────────────────────────────────────
 async function loadImage(url: string): Promise<HTMLImageElement | null> {
@@ -104,6 +104,15 @@ function roundRect(ctx: CanvasRenderingContext2D, x: number, y: number, w: numbe
   ctx.closePath();
 }
 
+/** '#rrggbb' (or '#rgb') → 'rgba(r, g, b, a)'. */
+function hexToRgba(hex: string, a: number): string {
+  const h = hex.replace('#', '');
+  const v = h.length === 3 ? h.split('').map((c) => c + c).join('') : h;
+  const n = parseInt(v.slice(0, 6), 16);
+  if (Number.isNaN(n)) return `rgba(0,0,0,${a})`;
+  return `rgba(${(n >> 16) & 255}, ${(n >> 8) & 255}, ${n & 255}, ${a})`;
+}
+
 function fitText(ctx: CanvasRenderingContext2D, text: string, maxWidth: number): string {
   let t = text;
   while (ctx.measureText(t).width > maxWidth && t.length > 2) t = t.slice(0, -1);
@@ -421,12 +430,20 @@ export async function drawCardToCanvas(data: CanvasCardData, side: 'front' | 'ba
   ctx.fillStyle = top;
   ctx.fillRect(0, 0, CARD_W, 170);
 
-  const bot = ctx.createLinearGradient(0, 210, 0, CARD_H);
+  // Bottom scrim — tints with the THEME (not plain black) so the card feels
+  // branded: fades into the theme's dark background with an accent glow.
+  const bot = ctx.createLinearGradient(0, 200, 0, CARD_H);
   bot.addColorStop(0, 'rgba(0,0,0,0)');
-  bot.addColorStop(0.55, 'rgba(0,0,0,0.45)');
-  bot.addColorStop(1, 'rgba(0,0,0,0.86)');
+  bot.addColorStop(0.5, hexToRgba(p.bg2, 0.55));
+  bot.addColorStop(1, hexToRgba(p.bg1, 0.97));
   ctx.fillStyle = bot;
-  ctx.fillRect(0, 210, CARD_W, CARD_H - 210);
+  ctx.fillRect(0, 200, CARD_W, CARD_H - 200);
+
+  const glow = ctx.createLinearGradient(0, CARD_H - 190, 0, CARD_H);
+  glow.addColorStop(0, 'rgba(0,0,0,0)');
+  glow.addColorStop(1, hexToRgba(p.accent, 0.20));
+  ctx.fillStyle = glow;
+  ctx.fillRect(0, CARD_H - 190, CARD_W, 190);
   ctx.restore();
 
   const logo = data.type === 'rider' && data.logoUrl ? await loadImage(data.logoUrl) : null;

src/pages/RiderCardPage.tsx

@@ -807,6 +807,13 @@ export default function RiderCardPage() {
                       </div>
                     </div>
 
+                    {!metadata?.picture && (
+                      <p className="text-[11px] text-amber-400">
+                        {t('cardUi.studio.noPhoto')}{' '}
+                        <Link to="/settings?section=profile" className="underline">{t('cardUi.studio.addPhoto')}</Link>
+                      </p>
+                    )}
+
                     <div className="grid grid-cols-2 gap-3">
                       <div>
                         <Label className="mb-1.5 block text-[10px] uppercase tracking-widest text-gray-500">{t('labUi.rider.ridesFor')}</Label>