Refactor code formatting and imports

- Reformat Rust code in extension database module
  - Improve line breaks and indentation
  - Remove commented-out test code
  - Clean up debug print statements formatting

- Update import path in CRDT schema (use @ alias)

- Fix UButton closing tag formatting in default layout

src/layouts/default.vue

@@ -96,8 +96,7 @@
             @click="handleAddWorkspace"
             icon="i-heroicons-plus"
             :label="t('workspaces.add')"
-          >
-          </UButton>
+          />
         </div>
       </template>
     </UDrawer>