Adding scope import

app/templates/admin/scope_import.html

@@ -0,0 +1,37 @@
+{% extends "base.html" %}
+{% block title %}Scope Import · {{ app_name }}{% endblock %}
+{% block body %}
+{% include "_nav.html" %}
+<main class="container">
+  <h1>Scope Import</h1>
+
+  <div class="card">
+    <h2>Upload spreadsheet</h2>
+    <p class="muted">
+      Upload an <code>.xlsx</code> file describing scopes (PartType = Scope). Rows are
+      matched on <code>product_number</code>; re-uploading updates existing scopes.
+    </p>
+    <form hx-post="/admin/scope-import"
+          hx-target="#scope-import-result"
+          hx-swap="innerHTML"
+          hx-encoding="multipart/form-data"
+          hx-indicator="#import-indicator">
+      <label>Spreadsheet
+        <input type="file" name="file" accept=".xlsx" required>
+      </label>
+      <button type="submit" class="btn btn-primary">Import</button>
+      <span id="import-indicator" class="htmx-indicator muted"> Importing…</span>
+    </form>
+    <details style="margin-top:1rem">
+      <summary class="muted">Expected columns</summary>
+      <ul class="muted">
+        {% for col in expected_columns %}
+        <li><code>{{ col }}</code></li>
+        {% endfor %}
+      </ul>
+    </details>
+  </div>
+
+  <div id="scope-import-result"></div>
+</main>
+{% endblock %}