Add birthday reminder widget to omsorgapp dashboard (FR-MA-7)

Also fixes date-input fields on the employee form (dateOfBirth/entryDate/
exitDate) to convert the generated client's Date objects into the
"YYYY-MM-DD" string <input type="date"> expects — needed for the widget's
birthday calculation and previously left the fields blank on edit.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

omsorgapp/src/modules/employees/EmployeeForm.jsx

@@ -21,20 +21,31 @@ export const emptyEmployeeForm = {
   qualification: "",
 };
 
+// Der generierte Client wandelt Datumsfelder aus der API-Antwort automatisch in Date-Objekte um
+// (siehe employeesApi.js) - <input type="date"> braucht dafür einen "YYYY-MM-DD"-String, sonst
+// bleibt das Feld leer (Muster analog AbsenceForm.jsx/OrderForm.jsx/TimeEntryForm.jsx).
+function toDateInputValue(value) {
+  if (!value) {
+    return "";
+  }
+  const date = value instanceof Date ? value : new Date(value);
+  return Number.isNaN(date.getTime()) ? "" : date.toISOString().slice(0, 10);
+}
+
 export function employeeToFormValues(employee) {
   return {
     firstName: employee.firstName ?? "",
     lastName: employee.lastName ?? "",
     status: employee.status ?? "Aktiv",
-    dateOfBirth: employee.dateOfBirth ?? "",
+    dateOfBirth: toDateInputValue(employee.dateOfBirth),
     street: employee.street ?? "",
     postalCode: employee.postalCode ?? "",
     city: employee.city ?? "",
     country: employee.country ?? "",
     phoneNumber: employee.phoneNumber ?? "",
     email: employee.email ?? "",
-    entryDate: employee.entryDate ?? "",
-    exitDate: employee.exitDate ?? "",
+    entryDate: toDateInputValue(employee.entryDate),
+    exitDate: toDateInputValue(employee.exitDate),
     emergencyContactName: employee.emergencyContactName ?? "",
     emergencyContactPhone: employee.emergencyContactPhone ?? "",
     emergencyContactRelation: employee.emergencyContactRelation ?? "",

omsorgapp/src/modules/home/BirthdayWidget.jsx

@@ -0,0 +1,109 @@
+import { useEffect, useState } from "react";
+import { Cake } from "lucide-react";
+
+import OmsorgCard from "../../components/OmsorgCard";
+import { useAuth } from "../../app/AuthContext";
+
+const WIDGET_PAGE_SIZE = 200;
+const REMINDER_DAYS_AHEAD = 5;
+
+// Nächstes Vorkommen des Geburtstags (dieses Jahr, oder nächstes Jahr falls schon vorbei) - Alter
+// spielt für die Erinnerung keine Rolle, nur der Tag/Monat.
+function daysUntilNextBirthday(dateOfBirth) {
+  const birth = dateOfBirth instanceof Date ? dateOfBirth : new Date(dateOfBirth);
+  if (Number.isNaN(birth.getTime())) {
+    return null;
+  }
+
+  const today = new Date();
+  today.setHours(0, 0, 0, 0);
+
+  let next = new Date(today.getFullYear(), birth.getMonth(), birth.getDate());
+  next.setHours(0, 0, 0, 0);
+  if (next < today) {
+    next = new Date(today.getFullYear() + 1, birth.getMonth(), birth.getDate());
+  }
+
+  return Math.round((next - today) / (1000 * 60 * 60 * 24));
+}
+
+function remainingLabel(days) {
+  if (days === 0) {
+    return "heute";
+  }
+  if (days === 1) {
+    return "morgen";
+  }
+  return `in ${days} Tagen`;
+}
+
+export default function BirthdayWidget() {
+  const { hasPermission } = useAuth();
+  const canView = hasPermission("Employees", "View");
+
+  const [employees, setEmployees] = useState([]);
+  const [isLoading, setIsLoading] = useState(true);
+
+  useEffect(() => {
+    if (!canView) {
+      return undefined;
+    }
+
+    let cancelled = false;
+
+    async function load() {
+      setIsLoading(true);
+      const result = await window.omsorg.employees.list({ status: "Aktiv", page: 1, pageSize: WIDGET_PAGE_SIZE });
+
+      if (!cancelled) {
+        setEmployees(result.ok ? result.data?.items ?? [] : []);
+        setIsLoading(false);
+      }
+    }
+
+    load();
+    return () => {
+      cancelled = true;
+    };
+  }, [canView]);
+
+  if (!canView) {
+    return null;
+  }
+
+  const upcoming = employees
+    .filter((employee) => employee.dateOfBirth)
+    .map((employee) => ({ employee, days: daysUntilNextBirthday(employee.dateOfBirth) }))
+    .filter(({ days }) => days !== null && days >= 0 && days <= REMINDER_DAYS_AHEAD)
+    .sort((a, b) => a.days - b.days);
+
+  return (
+    <OmsorgCard title="Anstehende Geburtstage">
+      <div className="contract-widget">
+        <div className="contract-widget__intro">
+          <Cake size={20} />
+
+          <p>Mitarbeiter, die in den nächsten {REMINDER_DAYS_AHEAD} Tagen Geburtstag haben.</p>
+        </div>
+
+        {!isLoading && upcoming.length === 0 && <p>Keine anstehenden Geburtstage.</p>}
+
+        <div className="contract-widget__list">
+          {upcoming.map(({ employee, days }) => (
+            <article key={employee.id} className={`contract-item contract-item--${days === 0 ? "danger" : "info"}`}>
+              <div className="contract-item__header">
+                <div>
+                  <strong>
+                    {employee.firstName} {employee.lastName}
+                  </strong>
+                </div>
+
+                <strong>{remainingLabel(days)}</strong>
+              </div>
+            </article>
+          ))}
+        </div>
+      </div>
+    </OmsorgCard>
+  );
+}

omsorgapp/src/modules/home/HomePage.jsx

@@ -5,6 +5,7 @@ import HomeStats from "./HomeStats";
 import OmsorgBadge from "../../components/ui/OmsorgBadge";
 import FollowUpWidget from "./FollowUpWidget";
 import OrderStatusWidget from "./OrderStatusWidget";
+import BirthdayWidget from "./BirthdayWidget";
 export default function HomePage() {
   return (
     <>
@@ -31,6 +32,7 @@ export default function HomePage() {
       <section className="dashboard-grid home-grid">
         <FollowUpWidget />
         <OrderStatusWidget />
+        <BirthdayWidget />
 
         <OmsorgCard title="Schnellaktionen">
           <div className="home-actions">