[feat] add savetime db

src/ts/storage/database.ts

@@ -621,6 +621,7 @@ export interface Database{
     promptTemplate?:Proompt[]
     forceProxyAsOpenAI?:boolean
     hypaModel:'ada'|'MiniLM'
+    saveTime?:number
 }
 
 interface hordeConfig{

src/ts/storage/globalApi.ts

@@ -217,7 +217,9 @@ export async function saveDb(){
         try {
             if(changed){
                 changed = false
-                const dbData = encodeRisuSave(get(DataBase))
+                let db = get(DataBase)
+                db.saveTime = Math.floor(Date.now() / 1000)
+                const dbData = encodeRisuSave(db)
                 if(isTauri){
                     await writeBinaryFile('database/database.bin', dbData, {dir: BaseDirectory.AppData})
                     await writeBinaryFile(`database/dbbackup-${(Date.now()/100).toFixed()}.bin`, dbData, {dir: BaseDirectory.AppData})