feat(ops): ECR-007 行为分析与 ECR-008 内容运营后台

落地埋点 ingest/数据看板、首页宫格 CMS 与测评上下架；含账号引导、问答流式与免责声明去重，以及 review P1 审计同事务修复。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/internal/llm/deepseek/client_test.go

@@ -40,8 +40,36 @@ func TestChat_success(t *testing.T) {
 	}
 }
 
-func TestEnabled(t *testing.T) {
-	if New(config.DeepSeekConfig{}).Enabled() {
-		t.Fatal("empty key should disable")
+func TestChatStream_success(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		var req chatRequest
+		_ = json.NewDecoder(r.Body).Decode(&req)
+		if !req.Stream {
+			t.Fatal("expected stream=true")
+		}
+		w.Header().Set("Content-Type", "text/event-stream")
+		flusher := w.(http.Flusher)
+		_, _ = w.Write([]byte("data: {\"choices\":[{\"delta\":{\"content\":\"你好\"}}]}\n\n"))
+		flusher.Flush()
+		_, _ = w.Write([]byte("data: {\"choices\":[{\"delta\":{\"content\":\"世界\"}}]}\n\n"))
+		flusher.Flush()
+		_, _ = w.Write([]byte("data: [DONE]\n\n"))
+		flusher.Flush()
+	}))
+	defer srv.Close()
+
+	c := New(config.DeepSeekConfig{
+		APIKey: "test-key", BaseURL: srv.URL, Model: "deepseek-chat", TimeoutSec: 5,
+	})
+	var got string
+	out, err := c.ChatStream(context.Background(), []Message{{Role: "user", Content: "hi"}}, func(d string) error {
+		got += d
+		return nil
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if out != "你好世界" || got != "你好世界" {
+		t.Fatalf("out=%q got=%q", out, got)
 	}
 }