Restructure UX and seed a fully simulated organisation

Rework the dashboard, environment topology view, header navigation, and
status rendering, and standardise selects on a shadcn-vue component.

Replace the thin database seeder with a SimulatedEnvironmentSeeder that
builds a fully wired, mostly-running organisation (ACTIVE server fleet,
managed + GHCR registries, Gitea source provider, ClipBin app with
production/staging environments, services, slices, endpoints, managed
variables, build artifacts, and a completed/in-progress/failed operations
history) so the new UI renders against realistic data.

resources/js/components/ui/select/SelectItem.vue

@@ -0,0 +1,43 @@
+<script setup lang="ts">
+import { cn } from "@/lib/utils";
+import { Check } from "lucide-vue-next";
+import {
+    SelectItem,
+    SelectItemIndicator,
+    type SelectItemProps,
+    SelectItemText,
+    useForwardProps,
+} from "radix-vue";
+import { computed, type HTMLAttributes } from "vue";
+
+const props = defineProps<SelectItemProps & { class?: HTMLAttributes["class"] }>();
+
+const delegatedProps = computed(() => {
+    const { class: _, ...delegated } = props;
+
+    return delegated;
+});
+
+const forwardedProps = useForwardProps(delegatedProps);
+</script>
+
+<template>
+    <SelectItem
+        v-bind="forwardedProps"
+        :class="
+            cn(
+                'relative flex w-full cursor-default select-none items-center rounded-sm py-1.5 pl-2 pr-8 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50',
+                props.class,
+            )
+        "
+    >
+        <span class="absolute right-2 flex size-3.5 items-center justify-center">
+            <SelectItemIndicator>
+                <Check class="size-4" />
+            </SelectItemIndicator>
+        </span>
+        <SelectItemText>
+            <slot />
+        </SelectItemText>
+    </SelectItem>
+</template>