Implement redirect with toast notification on profile save

- Add gotoHomeWithMessage function to navigationActions
- Redirect to home page after successful profile save
- Display success message in toast notification instead of in-form
- Check for profileSaved URL parameter on home page mount
- Clean up URL parameter after showing toast
- Move success message translation to home-page section
- Remove unused success state and message from AccountForm
- Remove useEffect import from AccountForm

User experience: After saving profile, users are redirected to the
familiar home screen and see a toast notification confirming the save.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/ui/MonthLocationList.tsx

@@ -9,8 +9,9 @@ import { LocationCard } from "./LocationCard";
 import { PrintButton } from "./PrintButton";
 import { BillingLocation, YearMonth } from "../lib/db-types";
 import { useRouter, useSearchParams } from "next/navigation";
-import { ToastContainer } from 'react-toastify';
+import { ToastContainer, toast } from 'react-toastify';
 import 'react-toastify/dist/ReactToastify.css';
+import { useTranslations } from "next-intl";
 
 const getNextYearMonth = (yearMonth:YearMonth) => {
     const {year, month} = yearMonth;
@@ -38,13 +39,26 @@ export const MonthLocationList:React.FC<MonthLocationListProps  > = ({
 
     const router = useRouter();
     const search = useSearchParams();
+    const t = useTranslations("home-page");
 
     const initialMonth = search.get('month')
-    
+
     const [expandedMonth, setExpandedMonth] = React.useState<number>(
         initialMonth ? parseInt(initialMonth as string) : -1 // no month is expanded
     );
 
+    // Check for profile saved success message
+    React.useEffect(() => {
+        if (search.get('profileSaved') === 'true') {
+            toast.success(t("profile-saved-message"), { theme: "dark" });
+            // Clean up URL parameter
+            const params = new URLSearchParams(search.toString());
+            params.delete('profileSaved');
+            const newSearch = params.toString();
+            router.replace(newSearch ? `?${newSearch}` : '/');
+        }
+    }, [search, router, t]);
+
     if(!availableYears || !months) {
         const currentYearMonth:YearMonth = {
             year: new Date().getFullYear(),