Add business Finance hub with invoices and templates.

Ship invoice issue/list/templates under Finance, fix tenant theme reset and owner role badge, and show customers-joined charts by Persian months.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/business/src/utils/monthlyActivity.ts

@@ -0,0 +1,45 @@
+import type { DailyActivityPoint } from '../services/dailyActivityService'
+import { buildLast12MonthKeys, formatMonthLabel } from './productActivity'
+
+export interface MonthActivityPoint {
+  monthKey: string
+  label: string
+  primary: number
+  secondary: number
+}
+
+function toMonthKey(dateKey: string): string {
+  return dateKey.slice(0, 7)
+}
+
+/** Roll daily dual series into the last 12 calendar months. */
+export function aggregateDailyActivityByMonth(
+  primaryItems: DailyActivityPoint[],
+  secondaryItems: DailyActivityPoint[],
+  locale: string,
+): MonthActivityPoint[] {
+  const monthKeys = buildLast12MonthKeys()
+  const primaryByMonth = new Map(monthKeys.map((key) => [key, 0]))
+  const secondaryByMonth = new Map(monthKeys.map((key) => [key, 0]))
+
+  for (const item of primaryItems) {
+    const key = toMonthKey(item.date)
+    if (primaryByMonth.has(key)) {
+      primaryByMonth.set(key, (primaryByMonth.get(key) ?? 0) + item.count)
+    }
+  }
+
+  for (const item of secondaryItems) {
+    const key = toMonthKey(item.date)
+    if (secondaryByMonth.has(key)) {
+      secondaryByMonth.set(key, (secondaryByMonth.get(key) ?? 0) + item.count)
+    }
+  }
+
+  return monthKeys.map((monthKey) => ({
+    monthKey,
+    label: formatMonthLabel(monthKey, locale),
+    primary: primaryByMonth.get(monthKey) ?? 0,
+    secondary: secondaryByMonth.get(monthKey) ?? 0,
+  }))
+}