feat: phase 1 MVP — sections, services, drag-drop, renderers

Backend: migration 0002 (sections/items/urls/settings), CRUD +
fractional reorder, icon upload, settings, export/import, cached
status pings. Handler tests cover reorder, URL scheme validation,
settings round-trip.

Frontend: shared board store over the generated client, dnd-kit
layer (same-section, cross-section, section reorder persisted),
URL chooser popover, add/edit service dialog, settings dialog,
Bento + Cards renderers behind the shared seam, dark/light theme.

Generated with [Devin](https://devin.ai)

Authored By: TDvorak <[email protected]>
Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

apps/frontend/src/components/ui/popover.tsx

@@ -0,0 +1,33 @@
+import * as React from "react";
+import * as PopoverPrimitive from "@radix-ui/react-popover";
+
+import { cn } from "@/lib/utils";
+
+const Popover = PopoverPrimitive.Root;
+const PopoverAnchor = PopoverPrimitive.Anchor;
+const PopoverTrigger = PopoverPrimitive.Trigger;
+
+function PopoverContent({
+	className,
+	align = "start",
+	sideOffset = 6,
+	...props
+}: React.ComponentProps<typeof PopoverPrimitive.Content>) {
+	return (
+		<PopoverPrimitive.Portal>
+			<PopoverPrimitive.Content
+				align={align}
+				sideOffset={sideOffset}
+				className={cn(
+					"z-30 min-w-[235px] rounded-[10px] border border-border-strong bg-popover p-[5px] text-text",
+					"shadow-[0_8px_30px_rgba(0,0,0,0.35),0_1px_3px_rgba(0,0,0,0.2)]",
+					"data-[state=open]:animate-in data-[state=open]:fade-in-0 data-[state=open]:zoom-in-[0.98]",
+					className,
+				)}
+				{...props}
+			/>
+		</PopoverPrimitive.Portal>
+	);
+}
+
+export { Popover, PopoverAnchor, PopoverTrigger, PopoverContent };