P0: Electrobun + Angular 22 + Tailwind skeleton boots under Bun

- Electrobun 1.18 shell with branding in src/shared/branding.ts
- Angular 22 zoneless UI in ui/ (workspace), Tailwind v4 shadcn-style tokens
- ng-icons/mynaui icon registry
- Node-version shim so Angular CLI runs under Bun without Node installed
- ssh2 SFTP verified working under Bun against test box

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

ui/src/app/app.html

@@ -0,0 +1,17 @@
+<div class="flex h-screen flex-col">
+  <header class="flex items-center gap-2 border-b border-border px-4 py-2">
+    <ng-icon name="mynaArrowLeftRight" class="text-muted-foreground" />
+    <h1 class="text-sm font-semibold">{{ appName }}</h1>
+  </header>
+
+  <main class="flex flex-1 items-center justify-center">
+    <div class="rounded-lg border border-border bg-card p-6 text-card-foreground shadow-sm">
+      <div class="flex items-center gap-3">
+        <ng-icon name="mynaHardDrive" size="1.5rem" class="text-primary" />
+        <ng-icon name="mynaArrowLeftRight" size="1.25rem" class="text-muted-foreground" />
+        <ng-icon name="mynaServers" size="1.5rem" class="text-primary" />
+      </div>
+      <p class="mt-3 text-sm text-muted-foreground">P0 skeleton — panels arrive in P1.</p>
+    </div>
+  </main>
+</div>