feat(prototype): rename web app to procurement service

docs/design/web-login.html

@@ -4,7 +4,7 @@
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <link rel="icon" href="data:,">
-  <title>登录 · cmbuyer 原型</title>
+  <title>登录 · 采购服务原型</title>
   <style>
     :root {
       color-scheme: light;
@@ -102,11 +102,11 @@
   <a class="skip-link" href="#main">跳到主要内容</a>
   <div class="prototype-banner">PROTOTYPE - 仅供枚举交互，非实现依据</div>
   <header class="site-header">
-    <a class="brand" href="web-task-workbench.html" aria-label="cmbuyer 原型工作台">
-      <span class="brand-mark" aria-hidden="true">CM</span>
-      <span>cmbuyer</span>
+    <a class="brand" href="web-task-workbench.html" aria-label="采购服务原型工作台">
+      <span class="brand-mark" aria-hidden="true">采</span>
+      <span>采购服务</span>
     </a>
-    <span class="header-meta">采购管理端 · 原型环境</span>
+    <span class="header-meta">采购服务 · 原型环境</span>
   </header>
 
   <main id="main">