refactor: rework cookie domain logic

internal/utils/app_utils_test.go

@@ -125,48 +125,3 @@ func TestFilter(t *testing.T) {
 	resultStr := utils.Filter(sliceStr, testFuncStr)
 	assert.Equal(t, expectedStr, resultStr)
 }
-
-func TestGetStandaloneCookieDomain(t *testing.T) {
-	// Normal case
-	domain := "http://tinyauth.app"
-	expected := "tinyauth.app"
-	result, err := utils.GetStandaloneCookieDomain(domain)
-	assert.NoError(t, err)
-	assert.Equal(t, expected, result)
-
-	// URL with subdomain (full hostname is returned, no subdomain stripping)
-	domain = "http://sub.tinyauth.app"
-	expected = "sub.tinyauth.app"
-	result, err = utils.GetStandaloneCookieDomain(domain)
-	assert.NoError(t, err)
-	assert.Equal(t, expected, result)
-
-	// URL with port (port should be stripped)
-	domain = "http://tinyauth.app:8080"
-	expected = "tinyauth.app"
-	result, err = utils.GetStandaloneCookieDomain(domain)
-	assert.NoError(t, err)
-	assert.Equal(t, expected, result)
-
-	// URL with path
-	domain = "https://tinyauth.app/some/path"
-	expected = "tinyauth.app"
-	result, err = utils.GetStandaloneCookieDomain(domain)
-	assert.NoError(t, err)
-	assert.Equal(t, expected, result)
-
-	// IP address
-	domain = "http://10.10.10.10"
-	_, err = utils.GetStandaloneCookieDomain(domain)
-	assert.ErrorContains(t, err, "ip addresses not allowed")
-
-	// Invalid domain (only TLD)
-	domain = "com"
-	_, err = utils.GetStandaloneCookieDomain(domain)
-	assert.ErrorContains(t, err, "invalid app url")
-
-	// Invalid URL
-	domain = "http://[::1]:namedport"
-	_, err = utils.GetStandaloneCookieDomain(domain)
-	assert.ErrorContains(t, err, "parse \"http://[::1]:namedport\": invalid port \":namedport\" after host")
-}