Fix Telegram proxy URL format (tg://proxy)

internal/telegram/telegram.go

@@ -3,6 +3,7 @@ package telegram
 
 import (
 	"fmt"
+	"net/url"
 	"os/exec"
 	"runtime"
 	"strings"
@@ -11,17 +12,32 @@ import (
 // ConfigureProxy opens Telegram's proxy configuration URL.
 // Returns true if successful, false otherwise.
 func ConfigureProxy(host string, port int, username, password string) bool {
-	// Build tg:// proxy URL
-	url := fmt.Sprintf("tg://socks?server=%s&port=%d", host, port)
+	// Build tg:// proxy URL with proper encoding
+	// Format: tg://proxy?server=host&port=port&user=username&pass=password
+	params := url.Values{}
+	params.Set("server", host)
+	params.Set("port", fmt.Sprintf("%d", port))
 	
 	if username != "" {
-		url += fmt.Sprintf("&user=%s", username)
+		params.Set("user", username)
 	}
 	if password != "" {
-		url += fmt.Sprintf("&pass=%s", password)
+		params.Set("pass", password)
 	}
-
-	return openURL(url)
+	
+	// Try both formats
+	urls := []string{
+		fmt.Sprintf("tg://proxy?%s", params.Encode()),
+		fmt.Sprintf("tg://socks?%s", params.Encode()),
+	}
+	
+	for _, testURL := range urls {
+		if openURL(testURL) {
+			return true
+		}
+	}
+	
+	return false
 }
 
 // openURL opens a URL in the default browser/application.