fix: blank page on channel click + logout issue

internal/auth/cookie.go

@@ -10,11 +10,6 @@ import (
 // Shared by password login, registration, and WebAuthn login.
 func SetSessionCookie(w http.ResponseWriter, cookieName, token string, duration time.Duration) {
 	secure := os.Getenv("COOKIE_SECURE") == "true"
-	
-	sameSite := http.SameSiteLaxMode
-	if secure {
-		sameSite = http.SameSiteStrictMode
-	}
 
 	http.SetCookie(w, &http.Cookie{
 		Name:     cookieName,
@@ -22,7 +17,7 @@ func SetSessionCookie(w http.ResponseWriter, cookieName, token string, duration
 		Path:     "/",
 		HttpOnly: true,
 		Secure:   secure,
-		SameSite: sameSite,
+		SameSite: http.SameSiteDefaultMode,
 		MaxAge:   int(duration.Seconds()),
 	})
 }