fix

apps/api/internal/processing/enhance_hash_test.go

@@ -107,7 +107,7 @@ func TestRunSteps_callsEnhanceWhenInputHashDiffers(t *testing.T) {
 	e := &Engine{
 		Completer: stubCompleter{fn: func(system, user string) (Completion, error) {
 			calls++
-			return Completion{Text: `{"name":"Fresh","description":"New copy."}`, TotalTokens: 3}, nil
+			return Completion{Text: `{"name":"Fresh","description":"Fresh retail copy with enough detail for a quality enhance hash."}`, TotalTokens: 3}, nil
 		}},
 		Vector: NoopVectorCategorizer{},
 	}
@@ -243,6 +243,42 @@ func TestRunSteps_thinOKDoesNotPersistEnhanceHash(t *testing.T) {
 	}
 }
 
+func TestRunSteps_synthesizedDescDoesNotPersistEnhanceHash(t *testing.T) {
+	e := &Engine{
+		Completer: stubCompleter{fn: func(system, user string) (Completion, error) {
+			// Empty description forces synthesizeProductDescription.
+			return Completion{Text: `{"name":"GIGABYTE GS27QC","description":""}`, TotalTokens: 3}, nil
+		}},
+		Vector: NoopVectorCategorizer{},
+	}
+	descTpl := map[string]any{
+		"sections": []any{
+			map[string]any{"type": "h1", "instructions": "Heading"},
+			map[string]any{"type": "p", "instructions": "Body"},
+		},
+	}
+	out, err := e.RunSteps(context.Background(), "co", ProductInput{
+		Name:                "GIGABYTE GS27QC",
+		Mapped:              map[string]any{"name": "GIGABYTE GS27QC", "category": "7", "brand": "GIGABYTE"},
+		DescriptionTemplate: descTpl,
+		Language:            "sl",
+	}, "enhance_only", nil, StepPolicy{AllowAI: true, AllowEPREL: true})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(out.ProcessedDescription, "<h1>") {
+		t.Fatalf("expected formula synthesize HTML, got %q", out.ProcessedDescription)
+	}
+	if h, _ := out.FieldSources[FieldEnhanceInputHash].(string); h != "" {
+		t.Fatalf("synthesized description must not persist enhance hash (got %q)", h)
+	}
+	for _, lf := range out.LocalizedContent {
+		if lf.EnhanceInputHash != "" {
+			t.Fatalf("localized synthesized hash must be empty: %+v", lf)
+		}
+	}
+}
+
 func TestRunSteps_weakPriorHashDoesNotSkipReprocess(t *testing.T) {
 	calls := 0
 	e := &Engine{