feat: initial commit — crema-app-aifirst-template

Hybrid traditional + AI-first webapp scaffold. Sibling to crema-app-template,
adds the AI assistant surface, command bus, scripts dialog, and virtual
cursor.

What's pre-wired:
- 6 routes: Overview, Resources, Activity, Assistant, Library, Settings
- Collapsible rail + appbar + avatar dropdown shell (template code, not a lib)
- Mobile sheet at <md
- /assistant: streaming chat via @crema/llm-ui, mock fallback, model selector,
  token meter, retry probe, stop-while-streaming, persistent UI Control toggle
- /settings: editable LM Studio endpoint + context window + response cap, with
  test-connection button
- Markdown rendering for assistant replies; ```action``` blocks rendered as a
  small "Ran N actions" pill
- ⌘⇧P script runner dialog + Play icon in the appbar
- Two demo scripts in public/scripts/
- mightypix theme as default, scoped via <AppShell theme="mightypix">

Libs wired in tsconfig + app.css:
- @crema/action-bus (the bus, parser, runner, cursor, provider, ws, llm-bridge)
- @crema/llm-ui, @crema/chat-ui, @crema/aifirst-ui, @crema/notification-ui
- lib-theme-mightypix

Docs:
- README.md — pitch + quick start + structure
- docs/AI_FIRST.md — full system tour (data-action contract, bus, DSL, scripts,
  cursor, LLM integration)
- app/components/layout/THEME_CONTRACT.md — every CSS variable a theme must declare
- CLAUDE.md — orientation for an LLM working in the repo

Genericized from comfy-cloud (the original prototype):
- Brand defaults to "App" / Sparkles icon (override via app/lib/identity.ts)
- User defaults to a stub (swap useUser() for real auth)
- localStorage namespace is "crema.*" (was "comfy.*")

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/components/ui/slider.tsx

@@ -0,0 +1,52 @@
+import { Slider as SliderPrimitive } from "@base-ui/react/slider"
+
+import { cn } from "~/lib/utils"
+
+function Slider({
+  className,
+  defaultValue,
+  value,
+  min = 0,
+  max = 100,
+  ...props
+}: SliderPrimitive.Root.Props) {
+  const _values = Array.isArray(value)
+    ? value
+    : Array.isArray(defaultValue)
+      ? defaultValue
+      : [min, max]
+
+  return (
+    <SliderPrimitive.Root
+      className={cn("data-horizontal:w-full data-vertical:h-full", className)}
+      data-slot="slider"
+      defaultValue={defaultValue}
+      value={value}
+      min={min}
+      max={max}
+      thumbAlignment="edge"
+      {...props}
+    >
+      <SliderPrimitive.Control className="relative flex w-full touch-none items-center select-none data-disabled:opacity-50 data-vertical:h-full data-vertical:min-h-40 data-vertical:w-auto data-vertical:flex-col">
+        <SliderPrimitive.Track
+          data-slot="slider-track"
+          className="relative grow overflow-hidden rounded-full bg-muted select-none data-horizontal:h-1 data-horizontal:w-full data-vertical:h-full data-vertical:w-1"
+        >
+          <SliderPrimitive.Indicator
+            data-slot="slider-range"
+            className="bg-primary select-none data-horizontal:h-full data-vertical:w-full"
+          />
+        </SliderPrimitive.Track>
+        {Array.from({ length: _values.length }, (_, index) => (
+          <SliderPrimitive.Thumb
+            data-slot="slider-thumb"
+            key={index}
+            className="relative block size-3 shrink-0 rounded-full border border-ring bg-white ring-ring/50 transition-[color,box-shadow] select-none after:absolute after:-inset-2 hover:ring-3 focus-visible:ring-3 focus-visible:outline-hidden active:ring-3 disabled:pointer-events-none disabled:opacity-50"
+          />
+        ))}
+      </SliderPrimitive.Control>
+    </SliderPrimitive.Root>
+  )
+}
+
+export { Slider }