add: delete actions for device + slightly better ui

packages/logic/domains/files/repository.ts

@@ -381,6 +381,47 @@ export class FileRepository {
         });
     }
 
+    listReferencedObjectKeysForUser(
+        fctx: FlowExecCtx,
+        userId: string,
+    ): ResultAsync<string[], Err> {
+        return ResultAsync.fromPromise(
+            this.db
+                .select({
+                    objectKey: file.objectKey,
+                    metadata: file.metadata,
+                })
+                .from(file)
+                .where(eq(file.userId, userId)),
+            (error) =>
+                fileErrors.getFilesFailed(
+                    fctx,
+                    error instanceof Error ? error.message : String(error),
+                ),
+        ).map((rows) => {
+            const keys = new Set<string>();
+
+            for (const row of rows) {
+                if (row.objectKey) {
+                    keys.add(row.objectKey);
+                }
+
+                const thumbnailKey =
+                    row.metadata &&
+                    typeof row.metadata === "object" &&
+                    "thumbnailKey" in row.metadata
+                        ? (row.metadata as Record<string, unknown>).thumbnailKey
+                        : undefined;
+
+                if (typeof thumbnailKey === "string" && thumbnailKey.length > 0) {
+                    keys.add(thumbnailKey);
+                }
+            }
+
+            return [...keys];
+        });
+    }
+
     updateFileStatus(
         fctx: FlowExecCtx,
         fileId: string,