fix(journals): add type='button' to prevent form submission and migrate to V3 Action API for file downloads

src/routes/journals/ae_comp__modal_journal_import.svelte

@@ -232,8 +232,8 @@
         {/if}
 
         <div class="modal-action">
-            <button class="btn preset-tonal-secondary" onclick={on_close}>Cancel</button>
-            <button 
+            <button type="button" class="btn preset-tonal-secondary" onclick={on_close}>Cancel</button>
+            <button type="button" 
                 class="btn preset-filled-primary" 
                 disabled={parsed_entries.length === 0 || is_importing}
                 onclick={handle_import}