feat(replays): Fix dark mode for URL + crumbs header (#35679)

static/app/components/replays/replayCurrentUrl.tsx

@@ -20,7 +20,7 @@ function ReplayCurrentUrl() {
 
 const UrlCopyInput = styled(TextCopyInput)`
   ${StyledInput} {
-    background: ${p => p.theme.white};
+    background: ${p => p.theme.background};
     border: none;
     padding: 0 ${space(0.75)};
     font-size: ${p => p.theme.fontSizeMedium};

static/app/views/replays/detail/userActionsNavigator.tsx

@@ -172,7 +172,7 @@ const Panel = styled(BasePanel)`
 `;
 
 const PanelHeader = styled(BasePanelHeader)`
-  background-color: ${p => p.theme.white};
+  background-color: ${p => p.theme.background};
   border-bottom: none;
   font-size: ${p => p.theme.fontSizeSmall};
   color: ${p => p.theme.gray300};