feat: implement export functionality for projects and scenarios with CSV and Excel support

templates/exports/modal.html

@@ -0,0 +1,51 @@
+<div
+  class="modal"
+  id="export-modal-{{ dataset }}"
+  data-export-dataset="{{ dataset }}"
+>
+  <div class="modal-dialog">
+    <div class="modal-content">
+      <div class="modal-header">
+        <h5 class="modal-title">Export {{ dataset|capitalize }}</h5>
+        <button
+          type="button"
+          class="btn-close"
+          data-dismiss="modal"
+          aria-label="Close"
+        ></button>
+      </div>
+      <form method="post" action="{{ submit_url }}" data-export-form>
+        <div class="modal-body">
+          <div class="mb-3">
+            <label class="form-label" for="export-format">Format</label>
+            <select class="form-select" id="export-format" name="format">
+              <option value="csv">CSV</option>
+              <option value="xlsx">Excel (.xlsx)</option>
+            </select>
+          </div>
+          <div class="form-check">
+            <input
+              class="form-check-input"
+              type="checkbox"
+              value="true"
+              id="include-metadata"
+              name="include_metadata"
+            />
+            <label class="form-check-label" for="include-metadata">
+              Include metadata sheet (Excel only)
+            </label>
+          </div>
+          <small class="form-text text-muted"
+            >Filters can be adjusted in the advanced export section.</small
+          >
+        </div>
+        <div class="modal-footer">
+          <button type="button" class="btn btn-secondary" data-dismiss="modal">
+            Cancel
+          </button>
+          <button type="submit" class="btn btn-primary">Download</button>
+        </div>
+      </form>
+    </div>
+  </div>
+</div>