Add files via upload

internal/handler/project_resolve.go

@@ -0,0 +1,18 @@
+package handler
+
+import (
+	"strings"
+
+	"cyberstrike-ai/internal/config"
+)
+
+// effectiveProjectID 请求/队列显式项目优先，否则使用 config.project.default_project_id。
+func effectiveProjectID(cfg *config.Config, explicit string) string {
+	if pid := strings.TrimSpace(explicit); pid != "" {
+		return pid
+	}
+	if cfg != nil {
+		return strings.TrimSpace(cfg.Project.DefaultProjectID)
+	}
+	return ""
+}