fix(dates): use local 'today' for date-input defaults instead of the UTC date

11 form defaults across 6 files used new Date().toISOString().split('T')[0] (the UTC date), which lands on yesterday during the post-midnight Prague window (UTC+1/+2). Added todayLocalStr() (local YYYY-MM-DD) in formatters and replaced them. Future-date expressions (e.g. invoice due_date +14d) left untouched.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/admin/components/dashboard/DashQuickActions.tsx

@@ -3,7 +3,7 @@ import { Link } from "react-router-dom";
 import { motion, AnimatePresence } from "framer-motion";
 import { useAuth } from "../../context/AuthContext";
 import { useAlert } from "../../context/AlertContext";
-import { formatKm } from "../../utils/formatters";
+import { formatKm, todayLocalStr } from "../../utils/formatters";
 import AdminDatePicker from "../AdminDatePicker";
 import apiFetch from "../../utils/api";
 import useModalLock from "../../hooks/useModalLock";
@@ -74,7 +74,7 @@ export default function DashQuickActions({
   const openTripModal = async () => {
     setTripForm({
       vehicle_id: "",
-      trip_date: new Date().toISOString().split("T")[0],
+      trip_date: todayLocalStr(),
       start_km: "",
       end_km: "",
       route_from: "",