33 - Add terminal UI primitives and base layout

frontend/src/App.tsx

@@ -1,11 +1,20 @@
+import AppLayout from './components/layout/AppLayout'
+import Button from './components/ui/Button'
+import DigitalProgressBar from './components/ui/DigitalProgressBar'
+import Panel from './components/ui/Panel'
+
 function App() {
   return (
-    <div className="flex min-h-screen flex-col items-center justify-center gap-4 font-mono">
-      <h1 className="text-primary text-4xl font-bold uppercase tracking-widest">
-        BUCKETS
-      </h1>
-      <p className="font-digital text-primary text-2xl">1234567890</p>
-    </div>
+    <AppLayout>
+      <Panel className="mx-auto max-w-md space-y-4">
+        <h2 className="text-primary font-bold uppercase tracking-wider">
+          Emergency Fund
+        </h2>
+        <DigitalProgressBar current={750} capacity={1000} />
+        <p className="font-digital text-primary text-xl">$750 / $1000</p>
+        <Button glow>+ Add Bucket</Button>
+      </Panel>
+    </AppLayout>
   )
 }
 

frontend/src/components/layout/AppLayout.tsx

@@ -0,0 +1,18 @@
+import type { ReactNode } from 'react'
+
+interface AppLayoutProps {
+  children: ReactNode
+}
+
+export default function AppLayout({ children }: AppLayoutProps) {
+  return (
+    <div className="bg-background text-foreground min-h-screen font-mono">
+      <header className="glow-red border-b-4 border-red-500 px-6 py-4">
+        <h1 className="text-primary text-2xl font-bold uppercase tracking-widest">
+          BUCKETS
+        </h1>
+      </header>
+      <main className="p-6">{children}</main>
+    </div>
+  )
+}

frontend/src/components/ui/Button.tsx

@@ -0,0 +1,19 @@
+import type { ButtonHTMLAttributes } from 'react'
+import { cn } from '../../lib/cn'
+
+interface ButtonProps extends ButtonHTMLAttributes<HTMLButtonElement> {
+  glow?: boolean
+}
+
+export default function Button({ glow, className, ...props }: ButtonProps) {
+  return (
+    <button
+      className={cn(
+        'border-2 border-red-500 bg-black px-4 py-2 font-mono font-bold uppercase tracking-wider text-red-500 transition-colors hover:bg-red-500 hover:text-black',
+        glow && 'glow-red',
+        className,
+      )}
+      {...props}
+    />
+  )
+}

frontend/src/components/ui/DigitalProgressBar.tsx

@@ -0,0 +1,59 @@
+interface DigitalProgressBarProps {
+  current: number
+  capacity: number
+}
+
+const BAR_COUNT = 20
+
+// Zone colors are driven by the theme's chart tokens (chart-1 red → chart-2
+// amber → chart-3 green) so they stay in sync with the palette; the glow is
+// derived from the same token via color-mix rather than a duplicated literal.
+function getZoneToken(index: number): string {
+  if (index < 10) return 'var(--chart-1)'
+  if (index < 18) return 'var(--chart-2)'
+  return 'var(--chart-3)'
+}
+
+function getBarColor(index: number): string {
+  if (index < 10) return 'bg-chart-1'
+  if (index < 18) return 'bg-chart-2'
+  return 'bg-chart-3'
+}
+
+export default function DigitalProgressBar({
+  current,
+  capacity,
+}: DigitalProgressBarProps) {
+  const filledBars =
+    capacity > 0
+      ? Math.min(Math.round((current / capacity) * BAR_COUNT), BAR_COUNT)
+      : 0
+
+  return (
+    <div
+      style={{
+        display: 'grid',
+        gridTemplateColumns: `repeat(${BAR_COUNT}, 1fr)`,
+        gap: '10px',
+        height: '2rem',
+      }}
+    >
+      {Array.from({ length: BAR_COUNT }, (_, i) => {
+        const filled = i < filledBars
+        return (
+          <div
+            key={i}
+            style={{
+              borderRadius: '3px',
+              transition: 'background-color 300ms, box-shadow 300ms',
+              boxShadow: filled
+                ? `0 0 8px color-mix(in oklch, ${getZoneToken(i)} 60%, transparent)`
+                : 'none',
+            }}
+            className={filled ? getBarColor(i) : 'bg-chart-1/10'}
+          />
+        )
+      })}
+    </div>
+  )
+}

frontend/src/components/ui/Panel.tsx

@@ -0,0 +1,13 @@
+import type { HTMLAttributes } from 'react'
+import { cn } from '../../lib/cn'
+
+type PanelProps = HTMLAttributes<HTMLDivElement>
+
+export default function Panel({ className, ...props }: PanelProps) {
+  return (
+    <div
+      className={cn('glow-red border-4 border-red-500 bg-black p-6', className)}
+      {...props}
+    />
+  )
+}

frontend/src/lib/cn.ts

@@ -0,0 +1,13 @@
+/**
+ * Minimal className joiner — filters out falsy values and joins with spaces.
+ * Avoids pulling clsx / tailwind-merge for the small primitive set here.
+ *
+ * Note: this does NOT resolve conflicting Tailwind utilities. If a consumer
+ * passes a class that conflicts with a default (e.g. bg-blue-500 over bg-black),
+ * both land in the DOM and CSS source order decides the winner — not "last wins".
+ */
+export function cn(
+  ...classes: Array<string | false | null | undefined>
+): string {
+  return classes.filter(Boolean).join(' ')
+}