diff --git a/src/server/report-exporters.ts b/src/server/report-exporters.ts
index d91eb4e..7dbef74 100644
--- a/src/server/report-exporters.ts
+++ b/src/server/report-exporters.ts
@@ -7,6 +7,7 @@ import type { Id } from "@/convex/_generated/dataModel"
 import { env } from "@/lib/env"
 import { buildXlsxWorkbook } from "@/lib/xlsx"
 import { REPORT_EXPORT_DEFINITIONS, type ReportExportKey } from "@/lib/report-definitions"
+export type { ReportExportKey }
 
 type ViewerIdentity = {
   tenantId: string
@@ -53,7 +54,7 @@ export type ReportArtifact = {
 
 type BaseOptions = {
   range?: string
-  companyId?: string
+  companyId?: string | null
 }
 
 export async function buildHoursWorkbook(
@@ -123,7 +124,7 @@ export async function buildHoursWorkbook(
     options.companyId ? `-${options.companyId}` : ""
   }${options.search ? `-${encodeURIComponent(options.search)}` : ""}.xlsx`
 
-  const arrayBuffer = workbook.buffer.slice(workbook.byteOffset, workbook.byteOffset + workbook.byteLength)
+  const arrayBuffer = workbook.buffer.slice(workbook.byteOffset, workbook.byteOffset + workbook.byteLength) as ArrayBuffer
   return {
     fileName,
     mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
@@ -139,7 +140,7 @@ export async function buildBacklogWorkbook(
     tenantId: ctx.tenantId,
     viewerId: ctx.viewerId,
     range: options.range,
-    companyId: options.companyId as Id<"companies"> | undefined,
+    companyId: (options.companyId ?? undefined) as Id<"companies"> | undefined,
   })
 
   const summaryRows: Array<Array<unknown>> = [
@@ -186,7 +187,7 @@ export async function buildBacklogWorkbook(
     options.companyId ? `-${options.companyId}` : ""
   }.xlsx`
 
-  const arrayBuffer = workbook.buffer.slice(workbook.byteOffset, workbook.byteOffset + workbook.byteLength)
+  const arrayBuffer = workbook.buffer.slice(workbook.byteOffset, workbook.byteOffset + workbook.byteLength) as ArrayBuffer
   return {
     fileName,
     mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
@@ -202,7 +203,7 @@ export async function buildSlaWorkbook(
     tenantId: ctx.tenantId,
     viewerId: ctx.viewerId,
     range: options.range,
-    companyId: options.companyId as Id<"companies"> | undefined,
+    companyId: (options.companyId ?? undefined) as Id<"companies"> | undefined,
   })
 
   const summaryRows: Array<Array<unknown>> = [
@@ -234,7 +235,7 @@ export async function buildSlaWorkbook(
     options.companyId ? `-${options.companyId}` : ""
   }.xlsx`
 
-  const arrayBuffer = workbook.buffer.slice(workbook.byteOffset, workbook.byteOffset + workbook.byteLength)
+  const arrayBuffer = workbook.buffer.slice(workbook.byteOffset, workbook.byteOffset + workbook.byteLength) as ArrayBuffer
   return {
     fileName,
     mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
@@ -250,7 +251,7 @@ export async function buildCsatWorkbook(
     tenantId: ctx.tenantId,
     viewerId: ctx.viewerId,
     range: options.range,
-    companyId: options.companyId as Id<"companies"> | undefined,
+    companyId: (options.companyId ?? undefined) as Id<"companies"> | undefined,
   })
 
   const summaryRows: Array<Array<unknown>> = [
@@ -286,7 +287,7 @@ export async function buildCsatWorkbook(
     options.companyId ? `-${options.companyId}` : ""
   }.xlsx`
 
-  const arrayBuffer = workbook.buffer.slice(workbook.byteOffset, workbook.byteOffset + workbook.byteLength)
+  const arrayBuffer = workbook.buffer.slice(workbook.byteOffset, workbook.byteOffset + workbook.byteLength) as ArrayBuffer
   return {
     fileName,
     mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
@@ -302,7 +303,7 @@ export async function buildTicketsByChannelWorkbook(
     tenantId: ctx.tenantId,
     viewerId: ctx.viewerId,
     range: options.range,
-    companyId: options.companyId as Id<"companies"> | undefined,
+    companyId: (options.companyId ?? undefined) as Id<"companies"> | undefined,
   })
 
   const CHANNEL_PT: Record<string, string> = {
@@ -342,7 +343,7 @@ export async function buildTicketsByChannelWorkbook(
     options.companyId ? `-${options.companyId}` : ""
   }.xlsx`
 
-  const arrayBuffer = workbook.buffer.slice(workbook.byteOffset, workbook.byteOffset + workbook.byteLength)
+  const arrayBuffer = workbook.buffer.slice(workbook.byteOffset, workbook.byteOffset + workbook.byteLength) as ArrayBuffer
   return {
     fileName,
     mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",