Fix unsafe property access and stale await in DurationInput, ModalAccountInfo, FilesPage

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/DurationInput.vue

@@ -368,7 +368,7 @@ function calculateTotalSeconds() {
 async function createData() {
   const size = props.size;
 
-  if (maxTotal.value !== (await null) && minTotal.value !== (await null)) {
+  if (maxTotal.value !== null && minTotal.value !== null) {
     switch (size) {
       case "max":
         secondToDate(minTotal.value, "min");