Reset repository to README title only

Approach is changing entirely; clearing prior implementation
to start over from a clean slate.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

views/partials/navbar.ejs

@@ -1,12 +0,0 @@
-<header class="adminHeader">
-  <a class="brandLink" href="/op/dashboard">
-    <span class="brandMark">MC</span>
-    <span>관리자 페이지</span>
-  </a>
-  <details class="userMenu">
-    <summary><%= userId %></summary>
-    <form method="post" action="/op/logout">
-      <button type="submit">로그아웃</button>
-    </form>
-  </details>
-</header>