feat(ops-web/auth): add remember-me with session/local storage split

Persistent logins land in localStorage, ephemeral ones in sessionStorage,
and we recall the last username + remember preference on the login form.
Also propagate the indigo brand color through the antd ConfigProvider
theme token so the side nav and avatar match the redesigned login.

apps/ops-web/src/views/LoginView.vue

@@ -72,11 +72,12 @@
 </template>
 
 <script setup lang="ts">
-import { reactive, ref } from "vue";
+import { onMounted, reactive, ref } from "vue";
 import { useRoute, useRouter } from "vue-router";
 import { StarOutlined, EyeOutlined, EyeInvisibleOutlined } from "@ant-design/icons-vue";
 
 import { OpsApiError } from "@/lib/http";
+import { readLoginPreference } from "@/lib/storage";
 import { useAuthStore } from "@/stores/auth";
 import AnimatedCharacters from "@/components/login-animation/AnimatedCharacters.vue";
 
@@ -89,7 +90,7 @@ const primaryColor = ref('#4f46e5');
 const submitting = ref(false);
 const showPassword = ref(false);
 const isTyping = ref(false);
-const remember = ref(false);
+const remember = ref(true);
 const errorMessage = ref<string | null>(null);
 
 const formState = reactive({
@@ -97,6 +98,14 @@ const formState = reactive({
   password: "",
 });
 
+onMounted(() => {
+  const pref = readLoginPreference();
+  remember.value = pref.remember;
+  if (pref.lastUsername) {
+    formState.username = pref.lastUsername;
+  }
+});
+
 async function handleSubmit(): Promise<void> {
   if (submitting.value) {
     return;
@@ -111,7 +120,7 @@ async function handleSubmit(): Promise<void> {
   submitting.value = true;
 
   try {
-    await authStore.login(formState.username.trim(), formState.password);
+    await authStore.login(formState.username.trim(), formState.password, remember.value);
     const redirect = typeof route.query.redirect === "string" ? route.query.redirect : "/admin-users";
     await router.replace(redirect);
   } catch (error) {