Fix translation issue in input auto-translation field for LLM-based Translation (#673)

# PR Checklist
- [x] Did you check if it works normally in all models? *ignore this
when it dosen't uses models*
- [x] Did you check if it works normally in all of web, local and node
hosted versions? if it dosen't, did you blocked it in those versions?
- [ ] Did you added a type def?

# Description
This PR introduces a fix for the issue where the input auto-translation
field ("Enter Message for Translate to English" text displayed when
nothing is entered) was not correctly translating the original text into
English in the LLM-based translation.

Additionally, this update ensures that "Curly Braced Syntaxes {{slot}}"
are translated into the user's native language when the translation
button is pressed, and into English during the input translation,
facilitating more effective translation.

src/ts/translator/translator.ts

@@ -111,7 +111,7 @@ export async function runTranslator(text:string, reverse:boolean, from:string,ta
 async function translateMain(text:string, arg:{from:string, to:string, host:string}){
     let db = getDatabase()
     if(db.translatorType === 'llm'){
-        const tr = db.translator || 'en'
+        const tr = arg.to || 'en'
         return translateLLM(text, {to: tr})
     }
     if(db.translatorType === 'deepl'){