feat(ui): show alert action buttons and status chips

Alerts that match a configured action get a button labelled from the
config. A confirm dialog opens first when the action defines confirm text.
After a press the UI posts the alert, reloads the state through the
existing poll path and shows the reported status as a chip, with an anchor
when the status carries a link.

The alert dialog comes from reka-ui through the usual shadcn-vue wrappers.

src/components/ui/alert-dialog/AlertDialogContent.vue

@@ -0,0 +1,43 @@
+<script setup lang="ts">
+import type { AlertDialogContentEmits, AlertDialogContentProps } from 'reka-ui'
+import type { HTMLAttributes } from 'vue'
+import { reactiveOmit } from '@vueuse/core'
+import {
+  AlertDialogContent,
+  AlertDialogOverlay,
+  AlertDialogPortal,
+  useForwardPropsEmits,
+} from 'reka-ui'
+import { cn } from '@/lib/utils'
+
+defineOptions({
+  inheritAttrs: false,
+})
+
+const props = defineProps<AlertDialogContentProps & { class?: HTMLAttributes['class'] }>()
+const emits = defineEmits<AlertDialogContentEmits>()
+
+const delegatedProps = reactiveOmit(props, 'class')
+const forwarded = useForwardPropsEmits(delegatedProps, emits)
+</script>
+
+<template>
+  <AlertDialogPortal>
+    <AlertDialogOverlay
+      data-slot="alert-dialog-overlay"
+      class="data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 fixed inset-0 z-50 bg-black/50"
+    />
+    <AlertDialogContent
+      data-slot="alert-dialog-content"
+      v-bind="{ ...forwarded, ...$attrs }"
+      :class="
+        cn(
+          'bg-background data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 fixed top-[50%] left-[50%] z-50 grid w-full max-w-[calc(100%-2rem)] translate-x-[-50%] translate-y-[-50%] gap-4 rounded-lg border p-6 shadow-lg duration-200 sm:max-w-lg',
+          props.class,
+        )
+      "
+    >
+      <slot />
+    </AlertDialogContent>
+  </AlertDialogPortal>
+</template>