Make sure file mode works

src/components/Chat.vue

@@ -35,7 +35,7 @@
       v-on:add-files="(files) => addAttachments(files)"
       :batch="uploadBatch"
       v-on:close="closeFileMode"
-      :showBackButton="false"
+      :fileModeMode="true"
       :defaultRootMessageText="$t('file_mode.files')"
     />
 

src/components/file_mode/SendAttachmentsLayout.vue

@@ -1,7 +1,7 @@
 <template>
   <div v-bind="{ ...$attrs }" class="send-attachments">
     <v-btn
-      v-if="showBackButton"
+      v-if="!fileModeMode"
       class="back-button clickable"
       icon="arrow_back"
       size="default"
@@ -229,10 +229,10 @@ export default defineComponent({
       },
     },
 
-    showBackButton: {
+    fileModeMode: {
       type: Boolean,
       default: function () {
-        return true;
+        return false;
       },
     },
 
@@ -323,7 +323,9 @@ export default defineComponent({
     },
     sendAll() {
       this.status = this.mainStatuses.SENDING;
-      this.$emit("close");
+      if (!this.fileModeMode) {
+        this.$emit("close");
+      }
       this.batch
         .send(this.messageInput && this.messageInput.length > 0 ? this.messageInput : this.defaultRootMessageText)
         .then(() => {

src/components/file_mode/ThumbnailView.vue

@@ -31,11 +31,11 @@ import { Attachment } from "../../models/attachment";
 import ImageWithProgress from "../ImageWithProgress.vue";
   
 function isEventAttachment(source: EventAttachment | Attachment | undefined): source is EventAttachment {
-    return (source as EventAttachment).event !== undefined;
+    return (source as EventAttachment)?.event !== undefined;
 }
 
 function isAttachment(source: EventAttachment | Attachment | undefined): source is Attachment {
-    return (source as Attachment).file !== undefined;
+    return (source as Attachment)?.file !== undefined;
 }
 
 const $$sanitize: any = inject("globalSanitize");

src/components/messages/composition/useThumbnail.ts

@@ -15,7 +15,7 @@ export const useThumbnail = (source: KeanuEvent | File | undefined) => {
   const fileSize = ref("");
 
   function isEvent(source: KeanuEvent | File | undefined): source is KeanuEvent {
-    return (source as KeanuEvent).getId !== undefined;
+    return (source as KeanuEvent)?.getId !== undefined;
   }
 
   if (isEvent(source)) {