fix

apps/api/internal/processing/steps.go

@@ -413,14 +413,11 @@ func (e *Engine) RunSteps(ctx context.Context, companyID string, in ProductInput
 				}
 				langMetas = append(langMetas, meta)
 				if lang == primary {
+					// Enriched fields only — keep out.Name / out.Description as the
+					// supplier/normalized Original so Review can show a real diff
+					// (Matched when we stamp both sides is a false "no change").
 					out.ProcessedName = name
 					out.ProcessedDescription = desc
-					if name != "" {
-						out.Name = name
-					}
-					if desc != "" {
-						out.Description = desc
-					}
 					if lf := localized[lang]; lf.MetaTitle != "" {
 						out.MetaTitle = lf.MetaTitle
 					}
@@ -458,9 +455,7 @@ func (e *Engine) RunSteps(ctx context.Context, companyID string, in ProductInput
 				if out.ProcessedName != "" && descriptionNeedsEnhanceRepair(out.ProcessedDescription, failDescTpl, out.ProcessedName, out.Name) {
 					if synth := synthesizeProductDescription(out.ProcessedName, displayCat, primary, enhanceAttrs, failDescTpl); synth != "" {
 						out.ProcessedDescription = synth
-						if out.Description == "" || descriptionNeedsEnhanceRepair(out.Description, failDescTpl, out.Name, out.ProcessedName) {
-							out.Description = synth
-						}
+						// Never stamp invent fallback onto Original description.
 						if lf, ok := localized[primary]; ok {
 							lf.ProcessedDescription = synth
 							if lf.ProcessedName == "" {
@@ -562,18 +557,9 @@ func (e *Engine) RunSteps(ctx context.Context, companyID string, in ProductInput
 			finalRepaired = true
 		}
 	}
-	if descriptionNeedsEnhanceRepair(out.Description, finalDescTpl, out.Name, out.ProcessedName) {
-		if out.ProcessedDescription != "" && !descriptionNeedsEnhanceRepair(out.ProcessedDescription, finalDescTpl, out.Name, out.ProcessedName) {
-			out.Description = out.ProcessedDescription
-			finalRepaired = true
-		} else if synth := synthesizeProductDescription(out.Name, displayCat, in.Language, out.Attributes, finalDescTpl); synth != "" {
-			out.Description = synth
-			finalRepaired = true
-			if descriptionNeedsEnhanceRepair(out.ProcessedDescription, finalDescTpl, out.ProcessedName, out.Name) {
-				out.ProcessedDescription = synth
-			}
-		}
-	}
+	// Original description stays supplier/normalized feed copy. Formula HTML belongs
+	// only on processed_description — copying synth onto description made Review
+	// always Matched with invent "Ključne lastnosti" instead of a real enrich diff.
 	if finalRepaired {
 		delete(out.FieldSources, FieldEnhanceInputHash)
 		primary := strings.TrimSpace(in.Language)
@@ -794,10 +780,16 @@ func normalizeTitleCompare(s string) string {
 }
 
 func titleNeedsRewriteRetry(in ProductInput, name string) bool {
-	if !aiprompts.CategoryTitlePromptRequiresRewrite(in.CategoryEnhancePrompt) {
+	if !titlesAreEquivalent(name, in.Name) {
 		return false
 	}
-	return titlesAreEquivalent(name, in.Name)
+	if aiprompts.CategoryTitlePromptRequiresRewrite(in.CategoryEnhancePrompt) {
+		return true
+	}
+	if FormatTitleFormulaConstraint(in.TitleTemplate) != "" {
+		return true
+	}
+	return FormatTitleSectionConstraint(in.CategoryEnhancePrompt) != ""
 }
 
 // enhanceHashForceReason returns why a matching prior enhance_input_hash must not
@@ -815,9 +807,29 @@ func enhanceHashForceReason(in ProductInput) string {
 	if titleNeedsRewriteRetry(in, in.PriorProcessedName) {
 		return "title-copy-paste"
 	}
+	// Prior enrich left description identical to supplier — never hash-skip that.
+	if descriptionsAreEquivalent(in.PriorProcessedDescription, in.Description) {
+		return "desc-copy-paste"
+	}
 	return ""
 }
 
+// descriptionsAreEquivalent compares supplier vs enriched description ignoring
+// trivial whitespace / case so copy-paste enhance cannot hash-skip forever.
+func descriptionsAreEquivalent(a, b string) bool {
+	na := normalizeDescCompare(a)
+	nb := normalizeDescCompare(b)
+	if na == "" || nb == "" {
+		return false
+	}
+	return na == nb
+}
+
+func normalizeDescCompare(s string) string {
+	s = stripHTMLTags(s)
+	return strings.Join(strings.Fields(strings.ToLower(strings.TrimSpace(s))), " ")
+}
+
 func (e *Engine) enhance(ctx context.Context, in ProductInput, category string, attrs map[string]any) (string, string, int, any, error) {
 	// Prompt Description HTML overlays count as the formula when description_template
 	// is empty — otherwise enhance accepts supplier-like prose and skips formula retry.