15853 fix background color for cable trace svg in dark mode

netbox/project-static/dist/cable_trace.css

@@ -1 +1 @@
-:root{--nbx-trace-color: #000;--nbx-trace-node-bg: #e9ecef;--nbx-trace-termination-bg: #f8f9fa;--nbx-trace-cable-shadow: #343a40;--nbx-trace-attachment: #ced4da}:root[data-bs-theme=dark]{--nbx-trace-color: #fff;--nbx-trace-node-bg: #212529;--nbx-trace-termination-bg: #343a40;--nbx-trace-cable-shadow: #e9ecef;--nbx-trace-attachment: #6c757d}*{font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Noto Sans,Liberation Sans,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji",Segoe UI Symbol,"Noto Color Emoji";font-size:.875rem}text{text-anchor:middle;dominant-baseline:middle}text:not([fill]){fill:var(--nbx-trace-color)}text.bold{font-weight:700}svg rect{fill:var(--nbx-trace-node-bg);stroke:#606060;stroke-width:1}svg rect .termination{fill:var(--nbx-trace-termination-bg)}svg .connector text{text-anchor:start}svg line{stroke-width:5px}svg polyline{fill:none;stroke-width:5px}svg .cable-shadow{stroke:var(--nbx-trace-cable-shadow);stroke-width:7px}svg line.wireless-link{stroke:var(--nbx-trace-attachment);stroke-dasharray:4px 12px;stroke-linecap:round}svg line.attachment{stroke:var(--nbx-trace-attachment);stroke-dasharray:5px}
+:root{--nbx-trace-bg: var(--tblr-bg-surface-secondary);--nbx-trace-color: #000;--nbx-trace-node-bg: #e9ecef;--nbx-trace-termination-bg: #f8f9fa;--nbx-trace-cable-shadow: #343a40;--nbx-trace-attachment: #ced4da}:root[data-bs-theme=dark]{--nbx-trace-bg: rgb(27, 41, 58);--nbx-trace-color: #fff;--nbx-trace-node-bg: #212529;--nbx-trace-termination-bg: #343a40;--nbx-trace-cable-shadow: #e9ecef;--nbx-trace-attachment: #6c757d}*{font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Noto Sans,Liberation Sans,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji",Segoe UI Symbol,"Noto Color Emoji";font-size:.875rem}text{text-anchor:middle;dominant-baseline:middle}text:not([fill]){fill:var(--nbx-trace-color)}text.bold{font-weight:700}svg{background-color:var(--nbx-trace-bg)}svg rect{fill:var(--nbx-trace-node-bg);stroke:#606060;stroke-width:1}svg rect .termination{fill:var(--nbx-trace-termination-bg)}svg .connector text{text-anchor:start}svg line{stroke-width:5px}svg polyline{fill:none;stroke-width:5px}svg .cable-shadow{stroke:var(--nbx-trace-cable-shadow);stroke-width:7px}svg line.wireless-link{stroke:var(--nbx-trace-attachment);stroke-dasharray:4px 12px;stroke-linecap:round}svg line.attachment{stroke:var(--nbx-trace-attachment);stroke-dasharray:5px}

netbox/project-static/styles/svg/cable_trace.scss

@@ -8,6 +8,7 @@
 
 :root {
   // Light mode values
+  --nbx-trace-bg: var(--tblr-bg-surface-secondary);
   --nbx-trace-color: #{$black};
   --nbx-trace-node-bg: #{$gray-200};
   --nbx-trace-termination-bg: #{$gray-100};
@@ -16,6 +17,7 @@
 
   &[data-bs-theme='dark'] {
     // Dark mode values
+    --nbx-trace-bg: rgb(27, 41, 58);
     --nbx-trace-color: #{$white};
     --nbx-trace-node-bg: #{$gray-900};
     --nbx-trace-termination-bg: #{$gray-800};
@@ -44,6 +46,8 @@ text {
 }
 
 svg {
+  background-color: var(--nbx-trace-bg);
+
   /* Boxes */
   rect {
     fill: var(--nbx-trace-node-bg);
@@ -79,4 +83,3 @@ svg {
     stroke-dasharray: 5px;
   }
 }
-