Add S3/MinIO storage for deployment previews

- Add S3 client helper (src/lib/s3.ts) with upload/download functions
- Add /api/deployments/[uuid]/preview endpoint for presigned URLs
- Update DeploymentDashboard to fetch and display preview images
- Install @aws-sdk/client-s3 and @aws-sdk/s3-request-presigner

Storage: MinIO bucket nuc-portal-previews with dedicated service account

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

package.json

@@ -10,6 +10,8 @@
     "lint": "eslint"
   },
   "dependencies": {
+    "@aws-sdk/client-s3": "^3.984.0",
+    "@aws-sdk/s3-request-presigner": "^3.984.0",
     "@tanstack/react-table": "^8.21.3",
     "next": "16.1.6",
     "pg": "^8.18.0",

src/app/api/deployments/[uuid]/preview/route.ts

@@ -0,0 +1,54 @@
+import { NextResponse } from 'next/server';
+import { getPreviewUrl, previewExists } from '@/lib/s3';
+import { fetchDeploymentDetail } from '@/lib/coolify-db';
+
+export async function GET(
+  _request: Request,
+  { params }: { params: Promise<{ uuid: string }> }
+) {
+  const { uuid } = await params;
+
+  try {
+    // Get deployment to find application UUID
+    const deployment = await fetchDeploymentDetail(uuid);
+
+    if (!deployment) {
+      return NextResponse.json({ error: 'Deployment not found' }, { status: 404 });
+    }
+
+    const appUuid = deployment.application_uuid;
+
+    // Check if preview exists
+    const exists = await previewExists(appUuid, uuid);
+
+    if (!exists) {
+      return NextResponse.json({
+        exists: false,
+        message: 'Preview not available',
+        hint: 'Screenshot will be captured after successful deployment',
+      });
+    }
+
+    // Get presigned URL (valid for 1 hour)
+    const url = await getPreviewUrl(appUuid, uuid);
+
+    if (!url) {
+      return NextResponse.json(
+        { error: 'Failed to generate preview URL' },
+        { status: 500 }
+      );
+    }
+
+    return NextResponse.json({
+      exists: true,
+      url,
+      expiresIn: 3600,
+    });
+  } catch (error) {
+    console.error('Preview fetch error:', error);
+    return NextResponse.json(
+      { error: 'Failed to fetch preview', details: String(error) },
+      { status: 500 }
+    );
+  }
+}

src/components/DeploymentDashboard.tsx

@@ -47,6 +47,14 @@ interface StatsResponse {
   timestamp: string;
 }
 
+interface PreviewResponse {
+  exists: boolean;
+  url?: string;
+  expiresIn?: number;
+  message?: string;
+  hint?: string;
+}
+
 interface DeploymentDashboardProps {
   deployment: Deployment;
 }
@@ -476,6 +484,13 @@ export function DeploymentDashboard({ deployment }: DeploymentDashboardProps) {
     { refreshInterval: 10000 }
   );
 
+  // Preview image (only fetch once, no refresh needed)
+  const { data: preview, isLoading: previewLoading } = useSWR<PreviewResponse>(
+    `/api/deployments/${deployment.deployment_uuid}/preview`,
+    fetcher,
+    { revalidateOnFocus: false }
+  );
+
   const coolifyUrl = `${clientConfig.coolifyUrl}/project/${clientConfig.coolifyProjectUuid}/production/application/${deployment.application_uuid}/deployment/${deployment.deployment_uuid}`;
 
   // Dozzle URL for runtime logs (uses IP since no domain configured)
@@ -632,10 +647,37 @@ export function DeploymentDashboard({ deployment }: DeploymentDashboardProps) {
             <div className="flex gap-6">
               {/* Preview thumbnail (left side) */}
               <div className="flex-shrink-0 w-80">
-                <div className="aspect-[16/10] bg-slate-900 dark:bg-stone-950 rounded-lg flex items-center justify-center overflow-hidden border border-slate-200 dark:border-stone-700">
-                  <div className="text-center">
-                    <Icon name="image" size={48} className="text-slate-600 dark:text-stone-600 mx-auto mb-2" />
-                    <span className="text-xs text-slate-500 dark:text-stone-500">Preview</span>
+                <div className="aspect-[16/10] bg-slate-900 dark:bg-stone-950 rounded-lg flex items-center justify-center overflow-hidden border border-slate-200 dark:border-stone-700 relative">
+                  {previewLoading ? (
+                    <div className="text-center">
+                      <Icon name="loader" size={32} className="text-slate-600 dark:text-stone-600 mx-auto mb-2 animate-spin" />
+                      <span className="text-xs text-slate-500 dark:text-stone-500">Loading preview...</span>
+                    </div>
+                  ) : preview?.exists && preview.url ? (
+                    <img
+                      src={preview.url}
+                      alt={`Preview of ${deployment.application_name}`}
+                      className="w-full h-full object-cover"
+                      onError={(e) => {
+                        // Hide image on error and show placeholder
+                        e.currentTarget.style.display = 'none';
+                        e.currentTarget.nextElementSibling?.classList.remove('hidden');
+                      }}
+                    />
+                  ) : (
+                    <div className="text-center">
+                      <Icon name="image" size={48} className="text-slate-600 dark:text-stone-600 mx-auto mb-2" />
+                      <span className="text-xs text-slate-500 dark:text-stone-500">
+                        {deployment.status === 'in_progress' ? 'Preview after deploy' : 'No preview'}
+                      </span>
+                    </div>
+                  )}
+                  {/* Fallback placeholder (hidden by default, shown on image error) */}
+                  <div className="hidden absolute inset-0 flex items-center justify-center bg-slate-900 dark:bg-stone-950">
+                    <div className="text-center">
+                      <Icon name="image" size={48} className="text-slate-600 dark:text-stone-600 mx-auto mb-2" />
+                      <span className="text-xs text-slate-500 dark:text-stone-500">Preview unavailable</span>
+                    </div>
                   </div>
                 </div>
               </div>

src/lib/s3.ts

@@ -0,0 +1,170 @@
+import {
+  S3Client,
+  PutObjectCommand,
+  GetObjectCommand,
+  DeleteObjectCommand,
+  HeadObjectCommand,
+} from '@aws-sdk/client-s3';
+import { getSignedUrl } from '@aws-sdk/s3-request-presigner';
+
+// S3/MinIO client configuration
+const s3Client = new S3Client({
+  endpoint: process.env.S3_ENDPOINT,
+  region: process.env.S3_REGION || 'us-east-1',
+  credentials: {
+    accessKeyId: process.env.S3_ACCESS_KEY || '',
+    secretAccessKey: process.env.S3_SECRET_KEY || '',
+  },
+  forcePathStyle: true, // Required for MinIO
+});
+
+const BUCKET = process.env.S3_BUCKET || 'nuc-portal-previews';
+
+/**
+ * Upload a file to S3/MinIO
+ */
+export async function uploadFile(
+  key: string,
+  body: Buffer | Uint8Array | string,
+  contentType: string = 'application/octet-stream'
+): Promise<{ success: boolean; key: string; error?: string }> {
+  try {
+    await s3Client.send(
+      new PutObjectCommand({
+        Bucket: BUCKET,
+        Key: key,
+        Body: body,
+        ContentType: contentType,
+      })
+    );
+    return { success: true, key };
+  } catch (error) {
+    console.error('S3 upload error:', error);
+    return { success: false, key, error: String(error) };
+  }
+}
+
+/**
+ * Upload a deployment preview screenshot
+ */
+export async function uploadPreviewScreenshot(
+  appUuid: string,
+  deploymentUuid: string,
+  imageBuffer: Buffer
+): Promise<{ success: boolean; key: string; url?: string; error?: string }> {
+  const key = `previews/${appUuid}/${deploymentUuid}.png`;
+  const result = await uploadFile(key, imageBuffer, 'image/png');
+
+  if (result.success) {
+    // Return the direct URL (MinIO serves files directly if bucket is public)
+    // Or use presigned URL for private buckets
+    const url = `${process.env.S3_ENDPOINT}/${BUCKET}/${key}`;
+    return { ...result, url };
+  }
+
+  return result;
+}
+
+/**
+ * Get a presigned URL for reading a file (valid for 1 hour by default)
+ */
+export async function getPresignedUrl(
+  key: string,
+  expiresIn: number = 3600
+): Promise<string | null> {
+  try {
+    const command = new GetObjectCommand({
+      Bucket: BUCKET,
+      Key: key,
+    });
+    return await getSignedUrl(s3Client, command, { expiresIn });
+  } catch (error) {
+    console.error('S3 presigned URL error:', error);
+    return null;
+  }
+}
+
+/**
+ * Get presigned URL for a deployment preview
+ */
+export async function getPreviewUrl(
+  appUuid: string,
+  deploymentUuid: string
+): Promise<string | null> {
+  const key = `previews/${appUuid}/${deploymentUuid}.png`;
+  return getPresignedUrl(key);
+}
+
+/**
+ * Check if a file exists in S3
+ */
+export async function fileExists(key: string): Promise<boolean> {
+  try {
+    await s3Client.send(
+      new HeadObjectCommand({
+        Bucket: BUCKET,
+        Key: key,
+      })
+    );
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+/**
+ * Check if a preview exists for a deployment
+ */
+export async function previewExists(
+  appUuid: string,
+  deploymentUuid: string
+): Promise<boolean> {
+  const key = `previews/${appUuid}/${deploymentUuid}.png`;
+  return fileExists(key);
+}
+
+/**
+ * Delete a file from S3
+ */
+export async function deleteFile(key: string): Promise<boolean> {
+  try {
+    await s3Client.send(
+      new DeleteObjectCommand({
+        Bucket: BUCKET,
+        Key: key,
+      })
+    );
+    return true;
+  } catch (error) {
+    console.error('S3 delete error:', error);
+    return false;
+  }
+}
+
+/**
+ * Get file as Buffer
+ */
+export async function getFile(key: string): Promise<Buffer | null> {
+  try {
+    const response = await s3Client.send(
+      new GetObjectCommand({
+        Bucket: BUCKET,
+        Key: key,
+      })
+    );
+
+    if (response.Body) {
+      const chunks: Uint8Array[] = [];
+      for await (const chunk of response.Body as AsyncIterable<Uint8Array>) {
+        chunks.push(chunk);
+      }
+      return Buffer.concat(chunks);
+    }
+    return null;
+  } catch (error) {
+    console.error('S3 get error:', error);
+    return null;
+  }
+}
+
+export { s3Client, BUCKET };