Restyle UI with a channel-strip console look and brand icon

Adds a pink/purple/blue SVG brand mark (favicon + header) and reworks
the visual language around the app's actual interaction - fader-driven
device control - via LED-style indicators, mono instrument readouts,
hairline-framed cards, console-tab nav, and an oscilloscope-style
session timeline. Leaves components/ui/* untouched, restyling only via
design tokens and the app's own composed components. Also fixes a
proxy.ts matcher gap that was gating /icon.svg behind auth.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01W8WkFF5ppURBAB918593Eb

app/(app)/recordings/[id]/page.tsx

@@ -23,7 +23,7 @@ export default async function RecordingDetailPage({ params }: { params: Promise<
     <div className="flex flex-col gap-6">
       <div className="flex items-center justify-between">
         <div>
-          <h1 className="font-display text-2xl font-semibold">{recording.name}</h1>
+          <h1 className="font-heading text-2xl font-semibold">{recording.name}</h1>
           {recording.description && <p className="text-sm text-muted-foreground">{recording.description}</p>}
         </div>
         <Button asChild>

app/(app)/recordings/[id]/replay/page.tsx

@@ -4,7 +4,7 @@ export default async function ReplayPage({ params }: { params: Promise<{ id: str
   const { id } = await params;
   return (
     <div className="flex flex-col gap-6">
-      <h1 className="font-display text-2xl font-semibold">Replay</h1>
+      <h1 className="font-heading text-2xl font-semibold">Replay</h1>
       <ReplayPlayerLoader recordingId={Number(id)} />
     </div>
   );

app/(app)/recordings/page.tsx

@@ -10,7 +10,7 @@ export default async function RecordingsPage() {
   return (
     <div className="flex flex-col gap-6">
       <div>
-        <h1 className="font-display text-2xl font-semibold">Recordings</h1>
+        <h1 className="font-heading text-2xl font-semibold">Recordings</h1>
         <p className="text-sm text-muted-foreground">Saved sessions you can replay against connected devices.</p>
       </div>
       <Card className="bp-glass">