fix(files): expose expiry and disable expired downloads

- return expiresAt and createdAt for scenario and run file metadata\n- keep download actions visible while preventing expired file access

client/src/i18n/locales/en.json

@@ -308,6 +308,7 @@
     "expiresAtLabel": "Expires At (optional)",
     "createdAt": "Created",
     "download": "Download",
+    "expiredTooltip": "File is expired",
     "empty": "No files uploaded.",
     "totalCount": "Total: {{count}} file(s)",
     "artifactsTitle": "Artifacts"

client/src/pages/run/RunDetailPage.tsx

@@ -17,6 +17,7 @@ import { scenarios } from '../../api';
 import {
   AutoRefreshIndicator,
   Badge,
+  Button,
   Breadcrumbs,
   Card,
   CodeBlock,
@@ -29,7 +30,7 @@ import {
   type TableColumn,
 } from '../../ui';
 import type { BadgeVariant } from '../../ui';
-import { ChevronDown, ChevronRight, ClipboardList, Activity } from 'lucide-react';
+import { ChevronDown, ChevronRight, ClipboardList, Activity, Download } from 'lucide-react';
 import styles from '../Page.module.css';
 
 const RUN_STATUS_VARIANT: Record<ScenarioRunStatus, BadgeVariant> = {
@@ -95,6 +96,16 @@ export function RunDetailPage() {
     }
   };
 
+  const handleFileDownload = (url: string, filename: string) => {
+    const link = document.createElement('a');
+    link.href = url;
+    link.download = filename;
+    link.click();
+  };
+
+  const isFileExpired = (file: FileMetadata) =>
+    file.expiresAt != null && new Date(file.expiresAt).getTime() <= Date.now();
+
   const manualRefresh = () => {
     if (!id || !runId) return;
     runs
@@ -240,6 +251,7 @@ export function RunDetailPage() {
       ),
       render: (s) => {
         const isExpanded = expandAll || expandedStepIds.has(s.id);
+
         return (
           <div>
             <div
@@ -481,11 +493,27 @@ export function RunDetailPage() {
                     {
                       key: 'download',
                       header: '',
-                      render: (f) => (
-                        <a href={runFiles.contentUrl(id!, runId!, f.id)} download={f.name}>
-                          {t('files.download')}
-                        </a>
-                      ),
+                      render: (f) => {
+                        const expired = isFileExpired(f);
+                        const tooltip = expired ? t('files.expiredTooltip') : t('files.download');
+
+                        return (
+                          <span title={tooltip}>
+                            <Button
+                              variant="secondary"
+                              size="sm"
+                              title={tooltip}
+                              aria-label={tooltip}
+                              disabled={expired}
+                              onClick={() =>
+                                handleFileDownload(runFiles.contentUrl(id!, runId!, f.id), f.name)
+                              }
+                            >
+                              <Download size={14} />
+                            </Button>
+                          </span>
+                        );
+                      },
                     },
                   ] satisfies TableColumn<FileMetadata>[]
                 }

client/src/pages/scenario/ScenarioDetailPage.tsx

@@ -7,6 +7,7 @@ import {
   Pencil,
   Plus,
   History,
+  Download,
   Trash2,
   Upload,
   GripVertical,
@@ -201,6 +202,16 @@ export function ScenarioDetailPage() {
     }
   };
 
+  const handleFileDownload = (url: string, filename: string) => {
+    const link = document.createElement('a');
+    link.href = url;
+    link.download = filename;
+    link.click();
+  };
+
+  const isFileExpired = (file: FileMetadata) =>
+    file.expiresAt != null && new Date(file.expiresAt).getTime() <= Date.now();
+
   async function handleUpload(e: SubmitEvent) {
     e.preventDefault();
     if (!id || !uploadFile) return;
@@ -649,7 +660,6 @@ export function ScenarioDetailPage() {
               </Button>
             </div>
 
-            <Card>
             <Table<FileMetadata>
               loading={filesLoading}
               data={files}
@@ -684,18 +694,32 @@ export function ScenarioDetailPage() {
                   {
                     key: 'download',
                     header: '',
-                      render: (f) => (
-                        <a href={scenarioFiles.contentUrl(id!, f.id)} download={f.name}>
-                          {t('files.download')}
-                        </a>
-                      ),
+                    render: (f) => {
+                      const expired = isFileExpired(f);
+                      const tooltip = expired ? t('files.expiredTooltip') : t('files.download');
+
+                      return (
+                        <span title={tooltip}>
+                          <Button
+                            variant="secondary"
+                            size="sm"
+                            title={tooltip}
+                            aria-label={tooltip}
+                            disabled={expired}
+                            onClick={() =>
+                              handleFileDownload(scenarioFiles.contentUrl(id!, f.id), f.name)
+                            }
+                          >
+                            <Download size={14} />
+                          </Button>
+                        </span>
+                      );
+                    },
                   },
                 ] satisfies TableColumn<FileMetadata>[]
               }
               emptyMessage={t('files.empty')}
             />
-              <p>{t('files.totalCount', { count: filesTotal })}</p>
-            </Card>
           </div>
 
           {/* ── Upload modal ─────────────────────────────────────────────── */}

server/src/file/file-storage.service.ts

@@ -19,6 +19,8 @@ export interface FileMetadata {
   mimeType: string;
   size: number;
   sha256: string;
+  expiresAt: Date | null;
+  createdAt: Date;
   path: string;
 }
 
@@ -271,6 +273,8 @@ export class FileStorageService implements OnModuleInit {
       mimeType: file.mimeType,
       size: file.size,
       sha256: file.sha256,
+      expiresAt: file.expiresAt,
+      createdAt: file.createdAt,
       path: this.getAbsolutePath(file.filePath),
     };
   }

server/src/scenario/scenario.service.ts

@@ -732,6 +732,9 @@ export class ScenarioService {
         name: item.name,
         mimeType: item.mimeType,
         size: item.size,
+        sha256: item.sha256,
+        expiresAt: item.expiresAt,
+        createdAt: item.createdAt,
       })),
       total: result.total,
     };
@@ -790,6 +793,9 @@ export class ScenarioService {
         name: item.name,
         mimeType: item.mimeType,
         size: item.size,
+        sha256: item.sha256,
+        expiresAt: item.expiresAt,
+        createdAt: item.createdAt,
       })),
       total: result.total,
     };