feat(tiktok): Enable outgoing image attachments (#13620)

- Enabled the attachment button for TikTok conversations in the reply
box
- Auto-split messages when both text and an image are composed together,
since the TikTok API rejects mixed text+media in a single message.
Fixes
https://linear.app/chatwoot/issue/CW-6528/enable-outgoing-image-attachments

app/javascript/dashboard/components/widgets/WootWriter/ReplyBottomPanel.vue

@@ -189,7 +189,7 @@ export default {
     },
     showAudioRecorderButton() {
       if (this.isEditorDisabled) return false;
-      if (this.isALineChannel) {
+      if (this.isALineChannel || this.isATiktokChannel) {
         return false;
       }
       // Disable audio recorder for safari browser as recording is not supported