feat: auth store, router guard and login page

src/AccountTracking.Web/src/router/index.ts

@@ -1,12 +1,20 @@
 import { createRouter, createWebHistory } from 'vue-router'
+import { useAuthStore } from '../stores/auth'
 
 const router = createRouter({
   history: createWebHistory(),
   routes: [
     { path: '/login', component: () => import('../views/LoginView.vue'), meta: { public: true } },
-    { path: '/', component: () => import('../views/DashboardView.vue') },
+    { path: '/',      component: () => import('../views/DashboardView.vue') },
     { path: '/transactions', component: () => import('../views/TransactionsView.vue') },
   ],
 })
 
+router.beforeEach((to) => {
+  if (to.meta.public) return true
+  const auth = useAuthStore()
+  if (!auth.isAuthenticated) return '/login'
+  return true
+})
+
 export default router

src/AccountTracking.Web/src/stores/auth.ts

@@ -0,0 +1,30 @@
+import { defineStore } from 'pinia'
+import { ref, computed } from 'vue'
+import { authApi } from '../api'
+
+export const useAuthStore = defineStore('auth', () => {
+  const token = ref<string | null>(localStorage.getItem('token'))
+  const expiresAt = ref<string | null>(localStorage.getItem('expiresAt'))
+
+  const isAuthenticated = computed(() => {
+    if (!token.value || !expiresAt.value) return false
+    return Date.now() < Date.parse(expiresAt.value)
+  })
+
+  async function login(username: string, password: string): Promise<void> {
+    const response = await authApi.login({ username, password })
+    token.value = response.token ?? null
+    expiresAt.value = response.expiresAt ?? null
+    if (token.value) localStorage.setItem('token', token.value)
+    if (expiresAt.value) localStorage.setItem('expiresAt', expiresAt.value)
+  }
+
+  function logout() {
+    token.value = null
+    expiresAt.value = null
+    localStorage.removeItem('token')
+    localStorage.removeItem('expiresAt')
+  }
+
+  return { token, isAuthenticated, login, logout }
+})

src/AccountTracking.Web/src/views/LoginView.vue

@@ -1 +1,65 @@
-<template><div>Login</div></template>
+<script setup lang="ts">
+import { ref } from 'vue'
+import { useRouter } from 'vue-router'
+import { useAuthStore } from '../stores/auth'
+
+const router = useRouter()
+const auth = useAuthStore()
+
+const username = ref('')
+const password = ref('')
+const error = ref('')
+const loading = ref(false)
+
+async function submit() {
+  error.value = ''
+  loading.value = true
+  try {
+    await auth.login(username.value, password.value)
+    router.push('/')
+  } catch {
+    error.value = 'Nesprávné přihlašovací údaje.'
+  } finally {
+    loading.value = false
+  }
+}
+</script>
+
+<template>
+  <v-container class="fill-height" fluid>
+    <v-row align="center" justify="center">
+      <v-col cols="12" sm="8" md="4">
+        <v-card>
+          <v-card-title class="text-h5 pa-6">Finance Tracker</v-card-title>
+          <v-card-text>
+            <v-alert v-if="error" type="error" class="mb-4">{{ error }}</v-alert>
+            <v-text-field
+              v-model="username"
+              label="Uživatelské jméno"
+              prepend-inner-icon="mdi-account"
+              @keyup.enter="submit"
+            />
+            <v-text-field
+              v-model="password"
+              label="Heslo"
+              type="password"
+              prepend-inner-icon="mdi-lock"
+              @keyup.enter="submit"
+            />
+          </v-card-text>
+          <v-card-actions class="pa-6 pt-0">
+            <v-btn
+              block
+              color="primary"
+              size="large"
+              :loading="loading"
+              @click="submit"
+            >
+              Přihlásit se
+            </v-btn>
+          </v-card-actions>
+        </v-card>
+      </v-col>
+    </v-row>
+  </v-container>
+</template>