feat: extract shop from mp/shop — initial libreshop/shop

Source moved verbatim from mp/shop/ on 2026-04-29; mp was the first
concrete adapter consuming the libreshop toolkit. Builds and publishes
git.librete.ch/libreshop/shop on every main / v* push via the standard
.gitea/workflows/build.yml shared across libreshop components.

components/TrustBar.vue

@@ -0,0 +1,59 @@
+<template>
+	<section
+		class="py-8"
+		:class="variant === 'light' ? 'bg-white text-gray-700 border-y border-gray-200' : 'bg-gray-900 text-white'"
+	>
+		<div class="xl:container mx-auto px-6">
+			<div class="grid grid-cols-2 lg:grid-cols-4 gap-6 lg:gap-0">
+				<div
+					v-for="(pillar, index) in pillars"
+					:key="pillar.title"
+					class="flex items-start gap-3 lg:px-6 lg:border-l lg:first:border-l-0"
+					:class="variant === 'light' ? 'lg:border-gray-300' : 'lg:border-gray-400'"
+				>
+					<component :is="pillar.icon" class="w-6 h-6 flex-shrink-0 opacity-60" />
+					<div>
+						<h4 class="font-semibold text-sm lg:text-base">{{ pillar.title }}</h4>
+						<p class="text-xs lg:text-sm opacity-70 mt-1">{{ pillar.description }}</p>
+					</div>
+				</div>
+			</div>
+		</div>
+	</section>
+</template>
+
+<script setup lang="ts">
+withDefaults(defineProps<{
+	variant?: "dark" | "light";
+}>(), {
+	variant: "dark",
+});
+
+import IconMapPin from "~/components/icons/IconMapPin.vue";
+import IconRecycle from "~/components/icons/IconRecycle.vue";
+import IconTruck from "~/components/icons/IconTruck.vue";
+import IconShield from "~/components/icons/IconShield.vue";
+
+const pillars = [
+	{
+		icon: IconMapPin,
+		title: "Made in Stuttgart",
+		description: "Handgebunden in unserer Werkstatt – keine langen Transportwege.",
+	},
+	{
+		icon: IconRecycle,
+		title: "100% Recyclingpapier",
+		description: "FSC-zertifiziert, Blauer Engel, CO₂-neutral produziert.",
+	},
+	{
+		icon: IconTruck,
+		title: "Schneller Versand",
+		description: "Deine Bestellung ist in 2-3 Werktagen bei Dir.",
+	},
+	{
+		icon: IconShield,
+		title: "Sicher bezahlen",
+		description: "BAR, PayPal, Kreditkarte, Lastschrift – verschlüsselt & geschützt.",
+	},
+];
+</script>