fix(openai): 修复 codex_cli_only 误拦截并补充 codex 家族识别

- 为 codex_cli_only 增加 originator 判定通道，避免仅依赖 User-Agent 误拦截
- 扩展官方客户端家族标识，补充 codex_chatgpt_desktop 等常见前缀
- 新增并更新单元测试与网关透传回归测试，覆盖 UA 与 originator 组合场景

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/internal/pkg/openai/request.go

@@ -15,41 +15,61 @@ var CodexOfficialClientUserAgentPrefixes = []string{
 	"codex_cli_rs/",
 	"codex_vscode/",
 	"codex_app/",
+	"codex_chatgpt_desktop/",
+	"codex_atlas/",
+	"codex_exec/",
+	"codex_sdk_ts/",
+	"codex ",
+}
+
+// CodexOfficialClientOriginatorPrefixes matches Codex 官方客户端家族 originator 前缀。
+// 说明：OpenAI 官方 Codex 客户端并不只使用固定的 codex_app 标识。
+// 例如 codex_cli_rs、codex_vscode、codex_chatgpt_desktop、codex_atlas、codex_exec、codex_sdk_ts 等。
+var CodexOfficialClientOriginatorPrefixes = []string{
+	"codex_",
+	"codex ",
 }
 
 // IsCodexCLIRequest checks if the User-Agent indicates a Codex CLI request
 func IsCodexCLIRequest(userAgent string) bool {
-	ua := strings.ToLower(strings.TrimSpace(userAgent))
+	ua := normalizeCodexClientHeader(userAgent)
 	if ua == "" {
 		return false
 	}
-	for _, prefix := range CodexCLIUserAgentPrefixes {
-		normalizedPrefix := strings.ToLower(strings.TrimSpace(prefix))
-		if normalizedPrefix == "" {
-			continue
-		}
-		// 优先前缀匹配；若 UA 被网关/代理拼接为复合字符串时，退化为包含匹配。
-		if strings.HasPrefix(ua, normalizedPrefix) || strings.Contains(ua, normalizedPrefix) {
-			return true
-		}
-	}
-	return false
+	return matchCodexClientHeaderPrefixes(ua, CodexCLIUserAgentPrefixes)
 }
 
 // IsCodexOfficialClientRequest checks if the User-Agent indicates a Codex 官方客户端请求。
 // 与 IsCodexCLIRequest 解耦，避免影响历史兼容逻辑。
 func IsCodexOfficialClientRequest(userAgent string) bool {
-	ua := strings.ToLower(strings.TrimSpace(userAgent))
+	ua := normalizeCodexClientHeader(userAgent)
 	if ua == "" {
 		return false
 	}
-	for _, prefix := range CodexOfficialClientUserAgentPrefixes {
-		normalizedPrefix := strings.ToLower(strings.TrimSpace(prefix))
+	return matchCodexClientHeaderPrefixes(ua, CodexOfficialClientUserAgentPrefixes)
+}
+
+// IsCodexOfficialClientOriginator checks if originator indicates a Codex 官方客户端请求。
+func IsCodexOfficialClientOriginator(originator string) bool {
+	v := normalizeCodexClientHeader(originator)
+	if v == "" {
+		return false
+	}
+	return matchCodexClientHeaderPrefixes(v, CodexOfficialClientOriginatorPrefixes)
+}
+
+func normalizeCodexClientHeader(value string) string {
+	return strings.ToLower(strings.TrimSpace(value))
+}
+
+func matchCodexClientHeaderPrefixes(value string, prefixes []string) bool {
+	for _, prefix := range prefixes {
+		normalizedPrefix := normalizeCodexClientHeader(prefix)
 		if normalizedPrefix == "" {
 			continue
 		}
-		// 优先前缀匹配；若 UA 被网关/代理拼接为复合字符串时，退化为包含匹配。
-		if strings.HasPrefix(ua, normalizedPrefix) || strings.Contains(ua, normalizedPrefix) {
+		// 优先前缀匹配；若 UA/Originator 被网关拼接为复合字符串时，退化为包含匹配。
+		if strings.HasPrefix(value, normalizedPrefix) || strings.Contains(value, normalizedPrefix) {
 			return true
 		}
 	}

backend/internal/pkg/openai/request_test.go

@@ -36,6 +36,11 @@ func TestIsCodexOfficialClientRequest(t *testing.T) {
 		{name: "codex_cli_rs 前缀", ua: "codex_cli_rs/0.98.0", want: true},
 		{name: "codex_vscode 前缀", ua: "codex_vscode/1.0.0", want: true},
 		{name: "codex_app 前缀", ua: "codex_app/0.1.0", want: true},
+		{name: "codex_chatgpt_desktop 前缀", ua: "codex_chatgpt_desktop/1.0.0", want: true},
+		{name: "codex_atlas 前缀", ua: "codex_atlas/1.0.0", want: true},
+		{name: "codex_exec 前缀", ua: "codex_exec/0.1.0", want: true},
+		{name: "codex_sdk_ts 前缀", ua: "codex_sdk_ts/0.1.0", want: true},
+		{name: "Codex 桌面 UA", ua: "Codex Desktop/1.2.3", want: true},
 		{name: "复合 UA 包含 codex_app", ua: "Mozilla/5.0 codex_app/0.1.0", want: true},
 		{name: "大小写混合", ua: "Codex_VSCode/1.2.3", want: true},
 		{name: "非 codex", ua: "curl/8.0.1", want: false},
@@ -51,3 +56,32 @@ func TestIsCodexOfficialClientRequest(t *testing.T) {
 		})
 	}
 }
+
+func TestIsCodexOfficialClientOriginator(t *testing.T) {
+	tests := []struct {
+		name       string
+		originator string
+		want       bool
+	}{
+		{name: "codex_cli_rs", originator: "codex_cli_rs", want: true},
+		{name: "codex_vscode", originator: "codex_vscode", want: true},
+		{name: "codex_app", originator: "codex_app", want: true},
+		{name: "codex_chatgpt_desktop", originator: "codex_chatgpt_desktop", want: true},
+		{name: "codex_atlas", originator: "codex_atlas", want: true},
+		{name: "codex_exec", originator: "codex_exec", want: true},
+		{name: "codex_sdk_ts", originator: "codex_sdk_ts", want: true},
+		{name: "Codex 前缀", originator: "Codex Desktop", want: true},
+		{name: "空白包裹", originator: "  codex_vscode  ", want: true},
+		{name: "非 codex", originator: "my_client", want: false},
+		{name: "空字符串", originator: "", want: false},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := IsCodexOfficialClientOriginator(tt.originator)
+			if got != tt.want {
+				t.Fatalf("IsCodexOfficialClientOriginator(%q) = %v, want %v", tt.originator, got, tt.want)
+			}
+		})
+	}
+}