Normalize briefing module options and weather stories

internal/adapters/weatherapi/client.go

@@ -305,16 +305,20 @@ func (b *bundleBuilder) fetchDiscussion(ctx context.Context) error {
 
 func (b *bundleBuilder) fetchWeatherStory(ctx context.Context) error {
 	var story weatherdata.WeatherStory
-	fetched, ok, err := b.fetchDecodedSource(ctx, sourceRequest{
+	request := sourceRequest{
 		name:           config.MissingSourceWeatherStory,
 		endpoint:       "/weatherstories/latest",
 		query:          queryOptions{omitUnits: true},
 		missingMessage: "NWS weather story data is missing",
-	}, &story)
+	}
+	fetched, ok, err := b.fetchDecodedSource(ctx, request, &story)
 	if err != nil || !ok {
 		return err
 	}
 	source := fetched.source
+	if !story.HasUsableContent() {
+		return b.handleMalformed(&source, fmt.Errorf("weather story has no usable content"), request)
+	}
 	if !story.StartTime.IsZero() {
 		source.IssuedAt = &story.StartTime
 	}

internal/adapters/weatherapi/client_test.go

@@ -768,6 +768,44 @@ func TestMalformedWeatherStoryUsesPolicy(t *testing.T) {
 	}
 }
 
+func TestEmptyWeatherStoryUsesPolicy(t *testing.T) {
+	for _, tt := range []struct {
+		name    string
+		policy  config.MissingSourcePolicy
+		wantErr bool
+	}{
+		{name: "warn", policy: config.MissingSourceWarn},
+		{name: "error", policy: config.MissingSourceError, wantErr: true},
+	} {
+		t.Run(tt.name, func(t *testing.T) {
+			server := fixtureServer(t, map[string]handlerOverride{
+				"/weatherstories/latest": {status: http.StatusOK, body: `{"data": {}}`},
+			}, nil)
+			client := newTestClient(t, server.URL+"/", map[string]config.MissingSourcePolicy{
+				"weather_story": tt.policy,
+			})
+
+			bundle, err := client.FetchBundle(context.Background())
+			if tt.wantErr {
+				if err == nil || !strings.Contains(err.Error(), "weather story has no usable content") {
+					t.Fatalf("FetchBundle() error = %v, want unusable weather story error", err)
+				}
+				return
+			}
+			if err != nil {
+				t.Fatalf("FetchBundle() error = %v", err)
+			}
+			if bundle.WeatherStory != nil {
+				t.Fatalf("WeatherStory = %#v, want nil for empty source", bundle.WeatherStory)
+			}
+			source := sourceByName(t, bundle.Sources, "weather_story")
+			if !source.Missing || len(source.Warnings) != 1 || source.Warnings[0].Code != "malformed_source" {
+				t.Fatalf("weather_story source = %#v, want malformed source warning", source)
+			}
+		})
+	}
+}
+
 func TestContextCancellation(t *testing.T) {
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		<-r.Context().Done()