feat: Redux-Integration für Meldungen, Anzeige von 'v' statt 's' in UI

redux/slices/messagesSlice.ts

@@ -0,0 +1,47 @@
+// redux/slices/messagesSlice.ts
+import { createSlice } from "@reduxjs/toolkit";
+import { getMessagesThunk } from "../thunks/getMessagesThunk";
+
+type Meldung = {
+  t: string;
+  s: number;
+  c: string;
+  m: string;
+  i: string;
+  v: string;
+};
+
+interface MessagesState {
+  data: Meldung[];
+  loading: boolean;
+  error: string | null;
+}
+
+const initialState: MessagesState = {
+  data: [],
+  loading: false,
+  error: null,
+};
+
+const messagesSlice = createSlice({
+  name: "messages",
+  initialState,
+  reducers: {},
+  extraReducers: (builder) => {
+    builder
+      .addCase(getMessagesThunk.pending, (state) => {
+        state.loading = true;
+        state.error = null;
+      })
+      .addCase(getMessagesThunk.fulfilled, (state, action) => {
+        state.loading = false;
+        state.data = action.payload;
+      })
+      .addCase(getMessagesThunk.rejected, (state, action) => {
+        state.loading = false;
+        state.error = action.error.message ?? "Unbekannter Fehler";
+      });
+  },
+});
+
+export default messagesSlice.reducer;