feat: add optional Day-of-Week Activity Excel sheet

.changeset/add-day-of-week-sheet.md

@@ -0,0 +1,5 @@
+---
+"mpesa2csv": minor
+---
+
+Add optional Day-of-Week Activity Excel analysis sheet.

README.md

@@ -47,7 +47,7 @@ M-PESA Statement PDFs arrive password-locked. mpesa2csv unlocks them on your mac
 
 ### Excel analysis sheets
 
-Optionally include sheets for money in/out, charges, cash-flow summary, monthly/weekly breakdown, daily balance, amount distribution, top contacts, recurring payments, and time-of-day patterns.
+Optionally include sheets for money in/out, charges, reversals, cash-flow summary, monthly/weekly breakdown, daily balance, amount distribution, top contacts, recurring payments, time-of-day patterns, and day-of-week activity.
 
 ### Privacy
 

src/components/export-options.tsx

@@ -121,6 +121,12 @@ const SHEET_GROUPS = [
         name: "Time of Day",
         description: "Transaction activity by hour — night, morning, afternoon, evening",
       },
+      {
+        key: "includeDayOfWeekSheet" as keyof ExportOptionsType,
+        name: "Day of Week",
+        description:
+          "Transaction activity by weekday — peak days and weekday vs weekend",
+      },
     ],
   },
 ];