From a6430bfe20ce5ebb7c8e625d49c5540c5c8b53f0 Mon Sep 17 00:00:00 2001
From: TT <92159997+ssharkkky@users.noreply.github.com>
Date: Sat, 5 Sep 2026 23:28:33 +0800
Subject: [PATCH] fix(antigravity): refresh default user agent version

The Antigravity service fingerprints clients by the version embedded in the User-Agent header. The built-in default (1.23.2) had drifted far behind current real client builds, so requests using the default UA started failing OAuth and probe flows.

Bump DefaultUserAgentVersion from 1.23.2 to 2.9.1 (current client build) and update the constant test accordingly. The default remains overridable via ANTIGRAVITY_USER_AGENT_VERSION and the admin setting.
---
 backend/internal/pkg/antigravity/oauth.go      | 2 +-
 backend/internal/pkg/antigravity/oauth_test.go | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/backend/internal/pkg/antigravity/oauth.go b/backend/internal/pkg/antigravity/oauth.go
index 26b307bbf7..625dcaea69 100644
--- a/backend/internal/pkg/antigravity/oauth.go
+++ b/backend/internal/pkg/antigravity/oauth.go
@@ -34,7 +34,7 @@ const (
 	AntigravityUserAgentVersionEnv = "ANTIGRAVITY_USER_AGENT_VERSION"
 
 	// DefaultUserAgentVersion 是未通过环境变量或后台设置覆盖时使用的默认版本号。
-	DefaultUserAgentVersion = "1.23.2"
+	DefaultUserAgentVersion = "2.9.1"
 
 	// 固定的 redirect_uri（用户需手动复制 code）
 	RedirectURI = "http://localhost:8085/callback"
diff --git a/backend/internal/pkg/antigravity/oauth_test.go b/backend/internal/pkg/antigravity/oauth_test.go
index 7849492c7c..4ebc7e5434 100644
--- a/backend/internal/pkg/antigravity/oauth_test.go
+++ b/backend/internal/pkg/antigravity/oauth_test.go
@@ -693,7 +693,7 @@ func TestConstants_值正确(t *testing.T) {
 	if RedirectURI != "http://localhost:8085/callback" {
 		t.Errorf("RedirectURI 不匹配: got %s", RedirectURI)
 	}
-	if GetUserAgent() != "antigravity/1.23.2 windows/amd64" {
+	if GetUserAgent() != "antigravity/2.9.1 windows/amd64" {
 		t.Errorf("UserAgent 不匹配: got %s", GetUserAgent())
 	}
 	if SessionTTL != 30*time.Minute {