feat: add full workbench login page

apps/web/src/app/App.svelte

@@ -1,76 +1,21 @@
 <script lang="ts">
-  import { onMount } from 'svelte';
-  import ProjectDashboard from '../features/projects/ProjectDashboard.svelte';
   import ServerLogin from '../features/auth/ServerLogin.svelte';
-  import SuggestionList from '../features/inbox/SuggestionList.svelte';
-  import type { Suggestion } from '../features/inbox/types';
-  import { createApi, type ProjectDashboardSummary } from '../lib/api';
-
-  const emptyDashboard: ProjectDashboardSummary = {
-    project_id: 1,
-    pending_inbox_count: 0,
-    open_task_count: 0,
-    recent_note_count: 0,
-    recent_session_count: 0,
-  };
 
   let apiBase = localStorage.getItem('apiBase') ?? 'http://localhost:8080';
-  let dashboard = emptyDashboard;
-  let connectionStatus = '未连接';
-  let selectedSuggestionCount = 0;
+  let currentUser: { account: string } | null = null;
 
-  const sampleSuggestions: Suggestion[] = [
-    {
-      kind: 'task',
-      title: '跟进报价',
-      body: '从项目 inbox 确认后创建任务，并保留来源记录。',
-    },
-    {
-      kind: 'note',
-      title: '客户背景',
-      body: '把对话中的背景信息沉淀成项目笔记。',
-    },
-  ];
-
-  onMount(() => {
-    void loadDashboard();
-  });
-
-  function handleServerChange(event: CustomEvent<{ apiBase: string }>) {
-    apiBase = event.detail.apiBase;
+  function handleLogin(detail: { apiBase: string; account: string }) {
+    apiBase = detail.apiBase;
     localStorage.setItem('apiBase', apiBase);
-    void loadDashboard();
-  }
-
-  async function loadDashboard() {
-    connectionStatus = '连接中';
-    try {
-      dashboard = await createApi(apiBase).getProjectDashboard(1);
-      connectionStatus = '已连接';
-    } catch {
-      dashboard = emptyDashboard;
-      connectionStatus = '无法连接服务器';
-    }
-  }
-
-  function handleConfirm(selected: Suggestion[]) {
-    selectedSuggestionCount = selected.length;
+    currentUser = { account: detail.account };
   }
 </script>
 
-<main class="shell">
-  <aside class="sidebar">
-    <h1>项目工作台</h1>
-    <ServerLogin {apiBase} on:serverChange={handleServerChange} />
-    <p class="connection-status" aria-live="polite">{connectionStatus}</p>
-  </aside>
-
-  <section class="workspace">
-    <ProjectDashboard summary={dashboard} />
-    <section class="inbox-review" aria-label="项目 inbox">
-      <h2>AI 整理建议</h2>
-      <SuggestionList suggestions={sampleSuggestions} onConfirm={handleConfirm} />
-      <p class="selection-status" aria-live="polite">已选择 {selectedSuggestionCount} 项</p>
-    </section>
-  </section>
-</main>
+{#if currentUser}
+  <main class="workbench-placeholder" aria-label="Project workbench">
+    <h1>SenlinAI Workbench</h1>
+    <p>Signed in as {currentUser.account}</p>
+  </main>
+{:else}
+  <ServerLogin {apiBase} onLogin={handleLogin} />
+{/if}