main: use default HTTP client (proxy via env)

cmd/bot/main.go

@@ -3,7 +3,6 @@ package main
 import (
 	"log"
 	"net/http"
-	"net/url"
 	"os"
 
 	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
@@ -19,21 +18,10 @@ func main() {
 	_ = godotenv.Load()
 
 	token := os.Getenv("BOT_TOKEN")
-	proxyURL := os.Getenv("HTTP_PROXY")
 	dbPath := getEnvDefault("DB_PATH", "db.sqlite3")
 
-	// Build HTTP client with optional proxy
-	var httpClient *http.Client
-	if proxyURL != "" {
-		parsed, err := url.Parse(proxyURL)
-		if err != nil {
-			log.Fatal(err)
-		}
-		tr := &http.Transport{Proxy: http.ProxyURL(parsed)}
-		httpClient = &http.Client{Transport: tr}
-	} else {
-		httpClient = http.DefaultClient
-	}
+	// Default HTTP client respects HTTP_PROXY env var automatically
+	httpClient := http.DefaultClient
 
 	botAPI, err := tgbotapi.NewBotAPIWithClient(token, "", httpClient)
 	if err != nil {