refactor: migrate web-app to use shared-code package

Update web-app to use @evidencija-rezija/shared-code for common types
and utilities instead of maintaining duplicate copies.

Changes:
- Add shared-code dependency to package.json
- Update all imports across 35+ files to use @evidencija-rezija/shared-code
- Remove duplicate db-types.ts and shareChecksum.ts files

This ensures type consistency between web-app and email-worker and
reduces maintenance burden.

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

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

web-app/app/ui/AddLocationButton.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import { PlusCircleIcon, HomeIcon } from "@heroicons/react/24/outline";
-import { YearMonth } from "../lib/db-types";
+import { YearMonth } from '@evidencija-rezija/shared-code';
 import { formatYearMonth } from "../lib/format";
 import Link from "next/link";
 import { useTranslations } from 'next-intl';

web-app/app/ui/AddMonthButton.tsx

@@ -3,7 +3,7 @@
 import { PlusCircleIcon, CalendarDaysIcon } from "@heroicons/react/24/outline";
 import React from "react";
 import { formatYearMonth } from "../lib/format";
-import { YearMonth } from "../lib/db-types";
+import { YearMonth } from '@evidencija-rezija/shared-code';
 import Link from "next/link";
 import { useLocale, useTranslations } from 'next-intl';
 

web-app/app/ui/BillBadge.tsx

@@ -1,5 +1,5 @@
 import { FC } from "react"
-import { Bill } from "@/app/lib/db-types"
+import { Bill } from "@evidencija-rezija/shared-code"
 import Link from "next/link"
 import { TicketIcon } from "@heroicons/react/24/outline"
 

web-app/app/ui/BillDeleteForm.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import { FC, ReactNode, useState } from "react";
-import { Bill, BillingLocation } from "../lib/db-types";
+import { Bill, BillingLocation } from '@evidencija-rezija/shared-code';
 import { useFormState } from "react-dom";
 import { Main } from "./Main";
 import { deleteBillById } from "../lib/actions/billActions";

web-app/app/ui/BillEditForm.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import { DocumentIcon, TicketIcon, TrashIcon } from "@heroicons/react/24/outline";
-import { Bill, BilledTo, BillingLocation } from "../lib/db-types";
+import { Bill, BilledTo, BillingLocation } from '@evidencija-rezija/shared-code';
 import React, { FC, useEffect } from "react";
 import { useFormState } from "react-dom";
 import { updateOrAddBill } from "../lib/actions/billActions";

web-app/app/ui/HomePage.tsx

@@ -1,7 +1,7 @@
 import { fetchAllLocations } from '@/app/lib/actions/locationActions';
 import { fetchAvailableYears } from '@/app/lib/actions/monthActions';
 import { getUserSettings } from '@/app/lib/actions/userSettingsActions';
-import { BillingLocation, YearMonth } from '@/app/lib/db-types';
+import { BillingLocation, YearMonth } from '@evidencija-rezija/shared-code';
 import { FC } from 'react';
 import { MonthLocationList } from '@/app/ui/MonthLocationList';
 

web-app/app/ui/LocationCard.tsx

@@ -3,7 +3,7 @@
 import { CheckCircleIcon, Cog8ToothIcon, PlusCircleIcon, ShareIcon, BanknotesIcon, EyeIcon, TicketIcon, ShoppingCartIcon, EnvelopeIcon, ExclamationTriangleIcon, ClockIcon, XCircleIcon } from "@heroicons/react/24/outline";
 import { FC } from "react";
 import { BillBadge } from "./BillBadge";
-import { BillingLocation, EmailStatus } from "../lib/db-types";
+import { BillingLocation, EmailStatus } from '@evidencija-rezija/shared-code';
 import { formatYearMonth } from "../lib/format";
 import { formatCurrency } from "../lib/formatStrings";
 import Link from "next/link";

web-app/app/ui/LocationDeleteForm.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import { FC, ReactNode, useState } from "react";
-import { BillingLocation } from "../lib/db-types";
+import { BillingLocation } from '@evidencija-rezija/shared-code';
 import { deleteLocationById } from "../lib/actions/locationActions";
 import { useFormState } from "react-dom";
 import Link from "next/link";

web-app/app/ui/LocationEditForm.tsx

@@ -2,7 +2,7 @@
 
 import { TrashIcon, ExclamationTriangleIcon, ClockIcon, EnvelopeIcon, CheckCircleIcon, PencilSquareIcon, XCircleIcon } from "@heroicons/react/24/outline";
 import { FC, useState } from "react";
-import { BillingLocation, UserSettings, YearMonth, EmailStatus } from "../lib/db-types";
+import { BillingLocation, UserSettings, YearMonth, EmailStatus } from '@evidencija-rezija/shared-code';
 import { updateOrAddLocation } from "../lib/actions/locationActions";
 import { useFormState } from "react-dom";
 import Link from "next/link";

web-app/app/ui/MonthCard.tsx

@@ -2,7 +2,7 @@
 
 import { FC, useEffect, useRef } from "react";
 import { formatYearMonth } from "../lib/format";
-import { YearMonth } from "../lib/db-types";
+import { YearMonth } from '@evidencija-rezija/shared-code';
 import { formatCurrency } from "../lib/formatStrings";
 import { useTranslations } from "next-intl";
 

web-app/app/ui/MonthLocationList.tsx

@@ -7,7 +7,7 @@ import { MonthCard } from "./MonthCard";
 import Pagination from "./Pagination";
 import { LocationCard } from "./LocationCard";
 import { PrintButton } from "./PrintButton";
-import { BillingLocation, UserSettings, YearMonth } from "../lib/db-types";
+import { BillingLocation, UserSettings, YearMonth } from '@evidencija-rezija/shared-code';
 import { useRouter, useSearchParams } from "next/navigation";
 import { ToastContainer, toast } from 'react-toastify';
 import 'react-toastify/dist/ReactToastify.css';

web-app/app/ui/PrintButton.tsx

@@ -2,7 +2,7 @@
 
 import { PrinterIcon } from '@heroicons/react/24/outline';
 import { useTranslations } from 'next-intl';
-import { YearMonth } from '../lib/db-types';
+import { YearMonth } from '@evidencija-rezija/shared-code';
 
 export interface PrintButtonProps {
   yearMonth: YearMonth;

web-app/app/ui/UserSettingsForm.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import { FC, useState } from "react";
-import { UserSettings } from "../lib/db-types";
+import { UserSettings } from '@evidencija-rezija/shared-code';
 import { updateUserSettings } from "../lib/actions/userSettingsActions";
 import { useFormState, useFormStatus } from "react-dom";
 import { useLocale, useTranslations } from "next-intl";

web-app/app/ui/ViewBillBadge.tsx

@@ -1,5 +1,5 @@
 import { FC } from "react";
-import { Bill } from "@/app/lib/db-types";
+import { Bill } from "@evidencija-rezija/shared-code";
 import Link from "next/link";
 import { TicketIcon } from "@heroicons/react/24/outline";
 import { useLocale } from "next-intl";

web-app/app/ui/ViewBillCard.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import { TicketIcon, CheckCircleIcon, XCircleIcon, DocumentIcon } from "@heroicons/react/24/outline";
-import { Bill, BillingLocation } from "../lib/db-types";
+import { Bill, BillingLocation } from '@evidencija-rezija/shared-code';
 import { FC, useState } from "react";
 import Link from "next/link";
 import { useRouter } from "next/navigation";

web-app/app/ui/ViewLocationCard.tsx

@@ -1,7 +1,7 @@
 'use client';
 
 import { FC, useMemo, useState } from "react";
-import { BilledTo, BillingLocation, UserSettings } from "../lib/db-types";
+import { BilledTo, BillingLocation, UserSettings } from '@evidencija-rezija/shared-code';
 import { formatYearMonth } from "../lib/format";
 import { formatCurrency, formatIban } from "../lib/formatStrings";
 import { useTranslations } from "next-intl";