Restyle the UI: instrument-panel palette, type system, and a signal accent

Replaces the default shadcn grayscale/Geist look with a deliberate
identity built around the product's own subject - a control panel for
running scripts and watching their output live:

- Type: Bricolage Grotesque for page/card titles (via the existing
  --font-heading token, used with restraint), IBM Plex Sans for UI body
  text, IBM Plex Mono for technical data (run IDs, commands, timestamps,
  status labels) - all self-hosted at build time via next/font/google,
  no runtime CDN dependency for a self-hosted tool.
- Color: a cool graphite ink/paper base with a warm brass signal accent
  in both themes. The brass tone doubles as the "running" status color,
  so an active run literally lights the UI up with the brand color.
  New --status-* tokens give queued/running/succeeded/failed/cancelled/
  warn a single source of truth instead of ad-hoc Tailwind color classes.
- Structural language: small tracked-out uppercase mono labels mark
  technical fields (Command, Variables, Triggered by...) consistently;
  the live-output terminal gets an instrument-bezel frame (header bar +
  panel) instead of floating loose above the xterm canvas.

Layout/IA is unchanged throughout - this is a token- and detail-level
pass, not a restructuring.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/(app)/runs/[runId]/page.tsx

@@ -81,36 +81,42 @@ export default async function RunDetailPage({ params }: RunDetailPageProps) {
               </Link>
             </CardAction>
           )}
-          <dl className="text-muted-foreground grid grid-cols-2 gap-x-4 gap-y-1 text-xs sm:grid-cols-3">
+          <dl className="text-muted-foreground grid grid-cols-2 gap-x-4 gap-y-2 text-xs sm:grid-cols-3">
             <div>
-              <dt className="font-medium">Triggered by</dt>
-              <dd>{run.triggeredBy}</dd>
+              <dt className="font-mono text-[0.7rem] font-medium tracking-widest uppercase">
+                Triggered by
+              </dt>
+              <dd className="font-mono">{run.triggeredBy}</dd>
             </div>
             <div>
-              <dt className="font-medium">Started</dt>
-              <dd>
+              <dt className="font-mono text-[0.7rem] font-medium tracking-widest uppercase">
+                Started
+              </dt>
+              <dd className="font-mono">
                 {run.startedAt ? new Date(run.startedAt).toLocaleString() : "-"}
               </dd>
             </div>
             <div>
-              <dt className="font-medium">Run ID</dt>
+              <dt className="font-mono text-[0.7rem] font-medium tracking-widest uppercase">
+                Run ID
+              </dt>
               <dd className="truncate font-mono">{run.id}</dd>
             </div>
           </dl>
         </CardHeader>
         <CardContent className="flex flex-col gap-4">
           <div className="flex flex-col gap-1.5">
-            <span className="text-muted-foreground text-xs font-medium">
+            <span className="text-muted-foreground font-mono text-[0.7rem] font-medium tracking-widest uppercase">
               Command
             </span>
-            <pre className="bg-muted overflow-x-auto rounded-md p-3 font-mono text-xs whitespace-pre">
+            <pre className="bg-muted border-primary/30 overflow-x-auto rounded-md border-l-2 p-3 font-mono text-xs whitespace-pre">
               {run.resolvedCommand}
             </pre>
           </div>
 
           {variableEntries.length > 0 && (
             <div className="flex flex-col gap-1.5">
-              <span className="text-muted-foreground text-xs font-medium">
+              <span className="text-muted-foreground font-mono text-[0.7rem] font-medium tracking-widest uppercase">
                 Variables
               </span>
               <dl className="grid gap-x-6 gap-y-2 rounded-md border p-3 text-xs sm:grid-cols-2">