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src/web/views/auth/login.hbs

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+<div class="card mx-auto" style="max-width: 26rem;">
+  <div class="card-body p-4">
+    <h1 class="h4 mb-3">Sign in</h1>
+    {{#if message}}
+      <div class="alert alert-warning">{{message}}</div>
+    {{/if}}
+    <form method="post" action="/login">
+      <div class="mb-3">
+        <label for="username" class="form-label">Username</label>
+        <input id="username" name="username" type="text" class="form-control" autocomplete="username" required />
+      </div>
+      <div class="mb-3">
+        <label for="password" class="form-label">Password</label>
+        <input id="password" name="password" type="password" class="form-control" autocomplete="current-password" required />
+      </div>
+      <button type="submit" class="btn btn-primary w-100">Sign in</button>
+    </form>
+  </div>
+</div>