[fix](trx-frontend): remove top bar overlap with waterfall

Keep the top bar above the waterfall and remove the rounded logo box styling.

Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

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

@@ -27,7 +27,7 @@
   --wavelength-fg: #8da3be;
   --spectrum-bg: #0a0f18;
   --jog-wheel-size: 83.2px;
-  --header-waterfall-overlap: 3.8rem;
+  --header-waterfall-overlap: 0rem;
 }
 
 [data-theme="light"] {
@@ -481,7 +481,7 @@ small { color: var(--text-muted); }
 .title { font-size: 1.4rem; font-weight: 700; display: inline-flex; align-items: center; gap: 0.35rem; }
 .overview-strip {
   width: 100%;
-  margin: calc(-1 * var(--header-waterfall-overlap)) 0 0.45rem;
+  margin: 0 0 0.45rem;
   position: relative;
   z-index: 4;
 }
@@ -715,10 +715,15 @@ small { color: var(--text-muted); }
   align-items: center;
   gap: 0.7rem;
   max-width: min(100%, 24rem);
-  padding: 0.25rem 0.65rem 0.25rem 0.35rem;
+  padding: 0;
   margin-left: 0;
   transform: none;
   flex-shrink: 0;
+  border-radius: 0;
+  background: transparent;
+  backdrop-filter: none;
+  -webkit-backdrop-filter: none;
+  box-shadow: none;
 }
 .tab-bar .header-logo {
   height: 2.6rem;
@@ -927,7 +932,7 @@ button:focus-visible, input:focus-visible, select:focus-visible {
   .card { padding: 0.7rem 0.7rem 1rem; }
   button { min-height: 2.8rem; font-size: 0.95rem; }
   input.status-input, select.status-input { font-size: 1.1rem; }
-  :root { --header-waterfall-overlap: 2.6rem; }
+  :root { --header-waterfall-overlap: 0rem; }
   .controls-tray { width: max(100%, 52rem); padding-left: 0.85rem; padding-right: 0.85rem; }
   .freq-inline { gap: 0.5rem; }
   .freq-inline { flex-wrap: wrap; }