feat(frontend): Toast-Bestaetigungen fuer Schnellerfassung

Sonner-Toaster global eingebunden. Erfolgs-Toast auf allen sechs
Schnellerfassungs-Formularen (Durchsicht, Varroa, Behandlung,
Fuetterung, Aufgabe, Ernte) - ohne Toast blieb nach dem Speichern
und Wegnavigieren keine sichtbare Bestaetigung, dass die Eingabe
gespeichert wurde. Wichtig fuer klares Feedback bei zeitkritischer
Erfassung am Bienenstand.

ApiCore-Frontend/src/app/(app)/feedings/new/page.tsx

@@ -3,6 +3,7 @@
 import { FormEvent, useState } from "react";
 import { useRouter, useSearchParams } from "next/navigation";
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+import { toast } from "sonner";
 import { fetchColonies } from "@/lib/colonies/api";
 import { createFeeding } from "@/lib/feedings/api";
 import { FeedType } from "@/lib/feedings/types";
@@ -60,6 +61,7 @@ export default function NewFeedingPage() {
       void queryClient.invalidateQueries({
         queryKey: ["colonies", feeding.colonyId, "feedings", "summary"],
       });
+      toast.success("Fütterung gespeichert");
       router.push(`/colonies/${feeding.colonyId}`);
     },
     onError: () => {

ApiCore-Frontend/src/app/(app)/harvests/new/page.tsx

@@ -3,6 +3,7 @@
 import { FormEvent, useState } from "react";
 import { useRouter, useSearchParams } from "next/navigation";
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+import { toast } from "sonner";
 import { fetchApiaries } from "@/lib/apiaries/api";
 import { fetchColonies } from "@/lib/colonies/api";
 import { createHarvest } from "@/lib/harvests/api";
@@ -47,6 +48,7 @@ export default function NewHarvestPage() {
     mutationFn: createHarvest,
     onSuccess: (harvest) => {
       void queryClient.invalidateQueries({ queryKey: ["harvests"] });
+      toast.success("Ernte gespeichert");
       router.push(`/harvests/${harvest.id}`);
     },
     onError: () => {

ApiCore-Frontend/src/app/(app)/inspections/new/page.tsx

@@ -3,6 +3,7 @@
 import { FormEvent, useState } from "react";
 import { useRouter, useSearchParams } from "next/navigation";
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+import { toast } from "sonner";
 import { fetchColonies } from "@/lib/colonies/api";
 import { createInspection } from "@/lib/inspections/api";
 import { Button } from "@/components/ui/button";
@@ -51,6 +52,7 @@ export default function NewInspectionPage() {
       void queryClient.invalidateQueries({
         queryKey: ["colonies", inspection.colonyId, "inspections"],
       });
+      toast.success("Durchsicht gespeichert");
       router.push(`/colonies/${inspection.colonyId}`);
     },
     onError: () => {

ApiCore-Frontend/src/app/(app)/tasks/new/page.tsx

@@ -3,6 +3,7 @@
 import { FormEvent, useState } from "react";
 import { useRouter } from "next/navigation";
 import { useMutation, useQueryClient } from "@tanstack/react-query";
+import { toast } from "sonner";
 import { createTask } from "@/lib/tasks/api";
 import { TaskPriority } from "@/lib/tasks/types";
 import { Button } from "@/components/ui/button";
@@ -33,6 +34,7 @@ export default function NewTaskPage() {
     mutationFn: createTask,
     onSuccess: () => {
       void queryClient.invalidateQueries({ queryKey: ["tasks"] });
+      toast.success("Aufgabe angelegt");
       router.push("/tasks");
     },
     onError: () => {

ApiCore-Frontend/src/app/(app)/treatments/new/page.tsx

@@ -3,6 +3,7 @@
 import { FormEvent, useState } from "react";
 import { useRouter, useSearchParams } from "next/navigation";
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+import { toast } from "sonner";
 import { fetchColonies } from "@/lib/colonies/api";
 import { createTreatment } from "@/lib/treatments/api";
 import { Button } from "@/components/ui/button";
@@ -48,6 +49,7 @@ export default function NewTreatmentPage() {
       void queryClient.invalidateQueries({
         queryKey: ["colonies", treatment.colonyId, "treatments"],
       });
+      toast.success("Behandlung gespeichert");
       router.push(`/colonies/${treatment.colonyId}`);
     },
     onError: () => {

ApiCore-Frontend/src/app/(app)/varroa/new/page.tsx

@@ -3,6 +3,7 @@
 import { FormEvent, useState } from "react";
 import { useRouter, useSearchParams } from "next/navigation";
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+import { toast } from "sonner";
 import { fetchColonies } from "@/lib/colonies/api";
 import { createVarroaMeasurement } from "@/lib/varroa/api";
 import { VarroaMethod } from "@/lib/varroa/types";
@@ -56,6 +57,7 @@ export default function NewVarroaMeasurementPage() {
       void queryClient.invalidateQueries({
         queryKey: ["colonies", measurement.colonyId, "varroa-measurements"],
       });
+      toast.success("Varroamessung gespeichert");
       router.push(`/colonies/${measurement.colonyId}`);
     },
     onError: () => {

ApiCore-Frontend/src/app/layout.tsx

@@ -2,6 +2,7 @@ import type { Metadata } from "next";
 import { Space_Grotesk, Inter, IBM_Plex_Mono } from "next/font/google";
 import "./globals.css";
 import { Providers } from "./providers";
+import { Toaster } from "@/components/ui/sonner";
 
 const spaceGrotesk = Space_Grotesk({
   variable: "--font-heading",
@@ -33,6 +34,7 @@ export default function RootLayout({ children }: LayoutProps<"/">) {
     >
       <body className="min-h-full flex flex-col">
         <Providers>{children}</Providers>
+        <Toaster position="top-right" richColors />
       </body>
     </html>
   );