fix module being reset

src/main/resources/templates/edition/assist.html

@@ -58,6 +58,7 @@
                         name="q"
                         placeholder="Search for group name, netID, or student name..."
                         th:value="${param.q}" />
+                    <input type="hidden" name="module" th:value="${module?.id}" />
                     <button type="submit" class="fa-solid fa-search"></button>
                 </form>