feat(registry): Add file attachment block

app/components/demo/FileAttachmentDemo.vue

@@ -0,0 +1,40 @@
+<script setup lang="ts">
+import { FileSpreadsheet } from "lucide-vue-next";
+import { FileAttachment } from "~/registry/blocks/file-attachment";
+</script>
+
+<template>
+  <div class="flex flex-wrap items-center gap-4">
+    <FileAttachment
+      name="product-shot.png"
+      type="image/png"
+      display-name="product-shot.png"
+      preview-url="https://images.unsplash.com/photo-1498050108023-c5249f4df085?q=80&w=240&auto=format&fit=crop"
+      status="uploaded"
+      removable
+      @remove="() => {}"
+    />
+
+    <FileAttachment
+      name="quarterly-report.csv"
+      type="text/csv"
+      status="uploading"
+    >
+      <template #icon>
+        <FileSpreadsheet
+          class="size-5"
+          aria-hidden="true"
+        />
+      </template>
+    </FileAttachment>
+
+    <FileAttachment
+      name="brief.pdf"
+      type="application/pdf"
+      status="error"
+      error="File is larger than the allowed limit"
+      removable
+      @remove="() => {}"
+    />
+  </div>
+</template>

app/registry/blocks/file-attachment/FileAttachment.vue

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+<script setup lang="ts">
+import type { HTMLAttributes } from "vue";
+import { computed } from "vue";
+import { AlertCircle, File, Image, Loader2, X } from "@lucide/vue";
+import { cn } from "@/lib/utils";
+
+export type FileAttachmentStatus = "idle" | "uploading" | "uploaded" | "error";
+
+export interface FileAttachmentProps {
+  /** Original file name supplied by the consuming app. */
+  name: string;
+  /** Optional MIME type used for the default fallback icon. */
+  type?: string;
+  /** Optional display name. Falls back to name. */
+  displayName?: string;
+  /** Optional preview image URL supplied by the consuming app. */
+  previewUrl?: string;
+  /** Display status supplied by the consuming app. */
+  status?: FileAttachmentStatus;
+  /** Error text shown when status is error. */
+  error?: string;
+  /** Show a remove button when not uploading. */
+  removable?: boolean;
+  /** Accessible label for the remove button. */
+  removeLabel?: string;
+  /** Accessible label for the attachment. */
+  ariaLabel?: string;
+  /** Additional CSS classes for the root element. */
+  class?: HTMLAttributes["class"];
+}
+
+const props = withDefaults(defineProps<FileAttachmentProps>(), {
+  type: "",
+  status: "idle",
+  removable: false,
+  removeLabel: "Remove attachment",
+});
+
+const emit = defineEmits<{
+  remove: [];
+}>();
+
+const label = computed(() => props.displayName ?? props.name);
+const isImage = computed(() => Boolean(props.previewUrl && props.type?.startsWith("image/")));
+const statusLabel = computed(() => {
+  if (props.status === "uploading") return "Uploading";
+  if (props.status === "error") return props.error || "Upload failed";
+  if (props.status === "uploaded") return "Uploaded";
+  return "Ready";
+});
+const attachmentLabel = computed(() => props.ariaLabel ?? `${label.value}, ${statusLabel.value}`);
+
+function fallbackIcon() {
+  if (props.type?.startsWith("image/")) return Image;
+  return File;
+}
+</script>
+
+<template>
+  <div
+    data-slot="file-attachment"
+    :class="cn('group relative inline-flex items-center gap-3 rounded-xl border bg-card p-2 pr-3 text-card-foreground shadow-sm', props.class)"
+    :aria-label="attachmentLabel"
+    :title="label"
+  >
+    <div
+      data-slot="file-attachment-preview"
+      class="relative flex size-11 shrink-0 items-center justify-center overflow-hidden rounded-lg bg-muted text-muted-foreground"
+    >
+      <slot
+        name="preview"
+        :file-name="name"
+        :display-name="label"
+        :type="type"
+        :preview-url="previewUrl"
+        :status="status"
+      >
+        <img
+          v-if="isImage"
+          :src="previewUrl"
+          :alt="label"
+          class="size-full object-cover"
+        >
+        <slot
+          v-else
+          name="icon"
+          :file-name="name"
+          :display-name="label"
+          :type="type"
+          :status="status"
+        >
+          <component
+            :is="fallbackIcon()"
+            class="size-5"
+            aria-hidden="true"
+          />
+        </slot>
+      </slot>
+
+      <div
+        v-if="status === 'uploading'"
+        data-slot="file-attachment-uploading"
+        class="absolute inset-0 flex items-center justify-center bg-background/70 backdrop-blur-xs"
+      >
+        <Loader2
+          class="size-5 animate-spin"
+          aria-hidden="true"
+        />
+      </div>
+
+      <div
+        v-else-if="status === 'error'"
+        data-slot="file-attachment-error-icon"
+        class="absolute inset-0 flex items-center justify-center bg-destructive/80 text-destructive-foreground"
+      >
+        <AlertCircle
+          class="size-5"
+          aria-hidden="true"
+        />
+      </div>
+    </div>
+
+    <div class="min-w-0">
+      <p
+        data-slot="file-attachment-name"
+        class="max-w-40 truncate text-sm font-medium"
+      >
+        {{ label }}
+      </p>
+      <p
+        data-slot="file-attachment-status"
+        :class="cn('text-xs text-muted-foreground', status === 'error' && 'text-destructive')"
+      >
+        {{ statusLabel }}
+      </p>
+    </div>
+
+    <slot
+      name="actions"
+      :file-name="name"
+      :display-name="label"
+      :type="type"
+      :preview-url="previewUrl"
+      :status="status"
+      :remove="() => emit('remove')"
+    >
+      <button
+        v-if="removable && status !== 'uploading'"
+        type="button"
+        data-slot="file-attachment-remove"
+        class="absolute -right-2 -top-2 inline-flex size-6 items-center justify-center rounded-full border bg-background text-muted-foreground opacity-0 shadow-sm transition-opacity hover:text-foreground focus-visible:opacity-100 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 group-hover:opacity-100"
+        :aria-label="removeLabel"
+        @click="emit('remove')"
+      >
+        <X
+          class="size-3.5"
+          aria-hidden="true"
+        />
+      </button>
+    </slot>
+  </div>
+</template>

app/registry/blocks/file-attachment/index.ts

@@ -0,0 +1 @@
+export { default as FileAttachment, type FileAttachmentProps, type FileAttachmentStatus } from "./FileAttachment.vue";

content/docs/2.components/17.file-attachment.md

@@ -0,0 +1,83 @@
+---
+title: FileAttachment
+description: Render display-only file attachment UI while your app owns upload behavior.
+category: chat
+---
+
+::component-preview
+---
+name: FileAttachmentDemo
+---
+::
+
+## Installation
+
+```bash
+npx shadcn-vue@latest add "https://ui.stackhacker.io/r/file-attachment.json"
+```
+
+## Usage
+
+```vue
+<script setup lang="ts">
+import { FileAttachment } from '@/components/file-attachment'
+</script>
+
+<template>
+  <FileAttachment
+    name="product-shot.png"
+    type="image/png"
+    preview-url="/uploads/product-shot.png"
+    status="uploaded"
+    removable
+    @remove="removeAttachment"
+  />
+</template>
+```
+
+## App-Owned Upload State
+
+`FileAttachment` renders display-only attachment UI. Your app owns upload handlers, preview URL creation and cleanup, file limits, server state, toast messages, and removal confirmation.
+
+Pass display-ready state through props. Use the `icon`, `preview`, or `actions` slots when your app needs custom file-type icons, preview rendering, or actions.
+
+## Examples
+
+### Status states
+
+::component-preview
+---
+name: FileAttachmentDemo
+---
+::
+
+## API Reference
+
+### Props
+
+| Prop | Type | Default | Description |
+|------|------|---------|-------------|
+| `name` | `string` | — | Original file name supplied by your app. |
+| `type` | `string` | `""` | Optional MIME type used for default fallback icons. |
+| `displayName` | `string` | — | Optional display name. Falls back to `name`. |
+| `previewUrl` | `string` | — | Optional preview image URL supplied by your app. |
+| `status` | `'idle' \| 'uploading' \| 'uploaded' \| 'error'` | `'idle'` | Display status supplied by your app. |
+| `error` | `string` | — | Error text shown when status is `error`. |
+| `removable` | `boolean` | `false` | Show a remove button when not uploading. |
+| `removeLabel` | `string` | `'Remove attachment'` | Accessible label for the remove button. |
+| `ariaLabel` | `string` | — | Accessible label for the attachment. |
+| `class` | `string` | — | Additional CSS classes for the root element. |
+
+### Events
+
+| Event | Payload | Description |
+|------|---------|-------------|
+| `remove` | `[]` | Emitted when the remove button is clicked. |
+
+### Slots
+
+| Slot | Props | Description |
+|------|-------|-------------|
+| `preview` | `{ name, displayName, type, previewUrl, status }` | Replace the preview area. |
+| `icon` | `{ name, displayName, type, status }` | Replace the fallback file icon. |
+| `actions` | `{ name, displayName, type, previewUrl, status, remove }` | Replace the remove/action area. |

scripts/registry-verify.ts

@@ -155,6 +155,10 @@ const expectedItems: Record<string, ExpectedRegistryItem> = {
     dependencies: ["@lucide/vue"],
     registryDependencies: [],
   },
+  "file-attachment": {
+    dependencies: ["@lucide/vue"],
+    registryDependencies: [],
+  },
 };
 
 if (registryIndex) {