desktop-new: move two call sites onto the surviving colour names

`text-danger` was the role that resolved to the wrong red; error text is
`text-red-12`, measured against every surface it lands on. `border-secondary` was
one of three indistinguishable border weights and is now the single
`border-primary`.

Signed-off-by: Morgan Martin <morganmartin@squareup.com>
Signed-off-by: morgmart <98432065+morgmart@users.noreply.github.com>

desktop-new/src/features/composer-spike/ui/ComposerSpikePage.tsx

@@ -138,7 +138,7 @@ export function ComposerSpikePage() {
         </button>
       </div>
 
-      <div className="rounded-md border border-secondary bg-panel p-3">
+      <div className="rounded-md border border-primary bg-panel p-3">
         <EditorContent editor={editor} />
       </div>
     </div>

desktop-new/src/features/sessions/ui/NewSessionView.tsx

@@ -69,7 +69,7 @@ export function NewSessionView({
               {pending.content}
             </span>
             {error ? (
-              <span className="text-body-sm text-danger">{error}</span>
+              <span className="text-body-sm text-red-12">{error}</span>
             ) : null}
           </div>
         ) : null}