feat(web): add /first-run + /login routes with auth guard

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

web/src/router/index.ts

@@ -1,23 +1,12 @@
 import { createRouter, createWebHistory } from 'vue-router';
+import { useSession } from '../composables/useSession.js';
 
 const router = createRouter({
   history: createWebHistory(),
   routes: [
-    {
-      path: '/',
-      name: 'home',
-      component: () => import('../views/Home.vue'),
-    },
-    {
-      path: '/search',
-      name: 'search',
-      component: () => import('../views/Search.vue'),
-    },
-    {
-      path: '/library',
-      name: 'library',
-      component: () => import('../views/Library.vue'),
-    },
+    { path: '/', name: 'home', component: () => import('../views/Home.vue') },
+    { path: '/search', name: 'search', component: () => import('../views/Search.vue') },
+    { path: '/library', name: 'library', component: () => import('../views/Library.vue') },
     {
       path: '/playlist/:id',
       name: 'playlist',
@@ -30,33 +19,44 @@ const router = createRouter({
       component: () => import('../views/Playlist.vue'),
       meta: { kind: 'album' },
     },
-    {
-      path: '/lyrics',
-      name: 'lyrics',
-      component: () => import('../views/Lyrics.vue'),
-    },
-    {
-      path: '/history',
-      name: 'history',
-      component: () => import('../views/History.vue'),
-    },
-    {
-      path: '/settings',
-      name: 'settings',
-      component: () => import('../views/Settings.vue'),
-    },
-    {
-      path: '/setup',
-      name: 'setup',
-      component: () => import('../views/Setup.vue'),
-    },
-    {
-      // Per-bot URL: /bot/:id — sets active bot then redirects to home
-      path: '/bot/:id',
-      name: 'bot',
-      component: () => import('../views/BotRedirect.vue'),
-    },
+    { path: '/lyrics', name: 'lyrics', component: () => import('../views/Lyrics.vue') },
+    { path: '/history', name: 'history', component: () => import('../views/History.vue') },
+    { path: '/settings', name: 'settings', component: () => import('../views/Settings.vue') },
+    { path: '/setup', name: 'setup', component: () => import('../views/Setup.vue') },
+    { path: '/bot/:id', name: 'bot', component: () => import('../views/BotRedirect.vue') },
+
+    // Auth views
+    { path: '/login', name: 'login', component: () => import('../views/Login.vue'), meta: { public: true } },
+    { path: '/first-run', name: 'first-run', component: () => import('../views/FirstRunSetup.vue'), meta: { public: true } },
   ],
 });
 
+const PUBLIC_NAMES = new Set(['login', 'first-run']);
+
+router.beforeEach(async (to) => {
+  const session = useSession();
+  if (!session.ready.value) {
+    await session.refresh();
+  }
+
+  if (session.needsSetup.value && to.name !== 'first-run') {
+    return { name: 'first-run' };
+  }
+  if (!session.needsSetup.value && to.name === 'first-run') {
+    return { name: 'home' };
+  }
+
+  if (PUBLIC_NAMES.has(to.name as string)) {
+    if (to.name === 'login' && session.isAuthenticated.value) {
+      return { name: 'home' };
+    }
+    return true;
+  }
+
+  if (!session.isAuthenticated.value) {
+    return { name: 'login', query: { next: to.fullPath } };
+  }
+  return true;
+});
+
 export default router;

web/src/views/FirstRunSetup.vue

@@ -0,0 +1,75 @@
+<template>
+  <div class="auth-page">
+    <form class="auth-card" @submit.prevent="submit">
+      <h1>首次使用</h1>
+      <p class="auth-hint">创建管理员账号。该账号将拥有 WebUI 的全部权限。</p>
+      <label>
+        <span>用户名</span>
+        <input v-model="username" type="text" autocomplete="username" autofocus required />
+      </label>
+      <label>
+        <span>密码 (≥8 位)</span>
+        <input v-model="password" type="password" autocomplete="new-password" minlength="8" required />
+      </label>
+      <label>
+        <span>再次输入密码</span>
+        <input v-model="confirm" type="password" autocomplete="new-password" minlength="8" required />
+      </label>
+      <p v-if="error" class="auth-error">{{ error }}</p>
+      <button type="submit" :disabled="loading">{{ loading ? '创建中…' : '创建管理员' }}</button>
+    </form>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref } from 'vue';
+import { useRouter } from 'vue-router';
+import { useSession } from '../composables/useSession.js';
+
+const username = ref('');
+const password = ref('');
+const confirm = ref('');
+const error = ref('');
+const loading = ref(false);
+const router = useRouter();
+const session = useSession();
+
+async function submit() {
+  error.value = '';
+  if (password.value !== confirm.value) {
+    error.value = '两次输入的密码不一致';
+    return;
+  }
+  loading.value = true;
+  try {
+    await session.setup(username.value, password.value);
+    router.replace('/');
+  } catch (e) {
+    error.value = (e as Error).message;
+  } finally {
+    loading.value = false;
+  }
+}
+</script>
+
+<style scoped lang="scss">
+.auth-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--bg-primary); }
+.auth-card {
+  width: 360px; padding: 32px; background: var(--bg-secondary);
+  border-radius: var(--radius-md); display: flex; flex-direction: column; gap: 12px;
+  box-shadow: var(--shadow-dropdown);
+}
+.auth-card h1 { margin: 0; font-size: 20px; color: var(--text-primary); }
+.auth-hint { margin: 0 0 4px; font-size: 12px; color: var(--text-secondary); }
+.auth-card label { display: flex; flex-direction: column; gap: 6px; font-size: 12px; color: var(--text-secondary); }
+.auth-card input {
+  height: 36px; padding: 0 10px; border-radius: var(--radius-sm);
+  background: var(--bg-primary); color: var(--text-primary); border: 1px solid var(--border-color);
+}
+.auth-card button {
+  height: 38px; border-radius: var(--radius-sm); border: 0;
+  background: var(--color-primary); color: #fff; font-weight: 500; cursor: pointer;
+}
+.auth-card button:disabled { opacity: 0.6; cursor: progress; }
+.auth-error { color: #e26a6a; font-size: 13px; margin: 0; }
+</style>