[style](trx-frontend-http): align RDS bar border-radius with UI standard

Replace 999px pill on #rds-ps-overlay with 6px to match the rest of
the UI button rounding.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

src/trx-client/trx-frontend/trx-frontend-http/assets/web/style.css

@@ -541,7 +541,7 @@ small { color: var(--text-muted); }
   color: var(--text-heading);
   padding: 0.34rem 0.9rem 0.28rem;
   border: 1px solid color-mix(in srgb, var(--border-light) 72%, transparent);
-  border-radius: 999px;
+  border-radius: 6px;
   background: color-mix(in srgb, var(--card-bg) 52%, transparent);
   backdrop-filter: blur(14px) saturate(135%);
   -webkit-backdrop-filter: blur(14px) saturate(135%);