Housekeeping: the surface token, and ignore the verification screenshots

The machine dropdown was still hard-coding one of four dark surface hexes
that globals.css already defines as a token.

Also ignore .verify/, where the Round 4 mobile checklist leaves its
screenshots. They are regenerated on every pass, so they were never meant
to be committed.

.gitignore

@@ -14,6 +14,9 @@ next-env.d.ts
 test-pb.mjs
 tsconfig.tsbuildinfo
 
+# mobile-checklist screenshots (AGENTS.md Round 4 — regenerate on every pass)
+.verify/
+
 # next-pwa build artifacts (generated into public/ on every build)
 public/sw.js
 public/sw.js.map

components/MachineCombobox.tsx

@@ -238,7 +238,7 @@ export function MachineCombobox({
             width: Math.max(anchor.width, menuWidth),
             zIndex: 1300,
           }}
-          className="rounded-xl bg-white dark:bg-[#1a222b] border border-gray-200 dark:border-white/10 shadow-2xl overflow-hidden"
+          className="rounded-xl bg-white dark:bg-surface border border-gray-200 dark:border-white/10 shadow-2xl overflow-hidden"
         >
           <div className="px-3 py-2 text-xs text-gray-500 dark:text-gray-400 border-b border-gray-100 dark:border-white/5">
             {groups.flat.length} of {machines.length} machines