feat(report): improve daily intelligence UX and price tracking

scripts/subscription_import_common_test.go

@@ -3,8 +3,10 @@
 package main
 
 import (
+	"fmt"
 	"net/http"
 	"net/http/httptest"
+	"strings"
 	"testing"
 	"time"
 )
@@ -46,3 +48,34 @@ func TestIsRetriableSubscriptionFetchErrorRecognizesForbidden(t *testing.T) {
 		t.Fatalf("403 应被视作可重试错误")
 	}
 }
+
+func TestFetchSubscriptionPageFallsBackToMarkdownSuffixOnForbidden(t *testing.T) {
+	attempts := map[string]int{}
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		attempts[r.URL.Path]++
+		switch r.URL.Path {
+		case "/cn/update/promotion":
+			http.Error(w, "forbidden", http.StatusForbidden)
+		case "/cn/update/promotion.md":
+			_, _ = w.Write([]byte("# 上新活动\nGLM Coding Plan 低至20元/月"))
+		default:
+			http.Error(w, fmt.Sprintf("unexpected path %s", r.URL.Path), http.StatusNotFound)
+		}
+	}))
+	defer server.Close()
+
+	client := &http.Client{Timeout: 2 * time.Second}
+	body, err := fetchSubscriptionPage(server.URL+"/cn/update/promotion", "", client)
+	if err != nil {
+		t.Fatalf("fetchSubscriptionPage 返回错误: %v", err)
+	}
+	if !strings.Contains(body, "GLM Coding Plan 低至20元/月") {
+		t.Fatalf("返回体缺少 markdown fallback 内容: %q", body)
+	}
+	if attempts["/cn/update/promotion"] != subscriptionFetchMaxAttempts {
+		t.Fatalf("期望原始路径按重试上限请求 %d 次，实际 %d", subscriptionFetchMaxAttempts, attempts["/cn/update/promotion"])
+	}
+	if attempts["/cn/update/promotion.md"] != 1 {
+		t.Fatalf("期望 .md 路径请求 1 次，实际 %d", attempts["/cn/update/promotion.md"])
+	}
+}