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/SelectLabel.vue

@@ -0,0 +1,13 @@
+<script setup lang="ts">
+import { cn } from "@/lib/utils";
+import { SelectLabel, type SelectLabelProps } from "radix-vue";
+import { type HTMLAttributes } from "vue";
+
+const props = defineProps<SelectLabelProps & { class?: HTMLAttributes["class"] }>();
+</script>
+
+<template>
+    <SelectLabel :class="cn('px-2 py-1.5 text-sm font-semibold', props.class)">
+        <slot />
+    </SelectLabel>
+</template>