fixes

apps/api/internal/processing/prompt_render.go

@@ -12,21 +12,76 @@ func resolveProductPromptTemplates(in ProductInput) (systemTpl, userTpl string)
 	userTpl = strings.TrimSpace(in.EnhanceUserTemplate)
 	// Per-category prompt wins for the user message (company system keeps JSON schema / brand).
 	if cat := strings.TrimSpace(in.CategoryEnhancePrompt); cat != "" {
-		userTpl = cat
+		userTpl = ensureCategoryEnhanceUserContext(cat)
 	}
 	def, ok := aiprompts.DefaultFor(aiprompts.KeyProductEnhance)
-	if !ok {
-		return systemTpl, userTpl
-	}
-	if systemTpl == "" {
-		systemTpl = def.SystemTemplate
-	}
-	if userTpl == "" {
-		userTpl = def.UserTemplate
+	if ok {
+		if systemTpl == "" {
+			systemTpl = def.SystemTemplate
+		}
+		if userTpl == "" {
+			userTpl = def.UserTemplate
+		}
 	}
+	// Category formulas are language-agnostic; inject once into the shared user skeleton.
+	userTpl = AppendFormulaConstraints(userTpl, in.TitleTemplate, in.DescriptionTemplate)
 	return systemTpl, userTpl
 }
 
+// thinEnhanceUserInstruction is prepended when Desc is empty or ≈ Name so the model
+// builds copy from Attrs+Category instead of echoing the title.
+const thinEnhanceUserInstruction = "Build the description from Attrs and Category only; never copy Name."
+
+// templateHasVar reports whether tpl contains {{name}} (via aiprompts.ExtractVariables).
+func templateHasVar(tpl, name string) bool {
+	for _, v := range aiprompts.ExtractVariables(tpl) {
+		if v == name {
+			return true
+		}
+	}
+	return false
+}
+
+// ensureCategoryEnhanceUserContext appends standard product context placeholders when a
+// category override omits {{attrs}} (common in DB category prompts). Does not rewrite
+// category copy that already includes attrs.
+func ensureCategoryEnhanceUserContext(userTpl string) string {
+	userTpl = strings.TrimSpace(userTpl)
+	if userTpl == "" || templateHasVar(userTpl, "attrs") {
+		return userTpl
+	}
+	var b strings.Builder
+	b.WriteString(userTpl)
+	b.WriteString("\n\n")
+	first := true
+	appendLine := func(line string) {
+		if !first {
+			b.WriteByte('\n')
+		}
+		first = false
+		b.WriteString(line)
+	}
+	if !templateHasVar(userTpl, "category") {
+		appendLine("Category: {{category}}")
+	}
+	if !templateHasVar(userTpl, "name") {
+		appendLine("Name: {{name}}")
+	}
+	if !templateHasVar(userTpl, "description") {
+		appendLine("Desc: {{description}}")
+	}
+	appendLine("Attrs: {{attrs}}")
+	return b.String()
+}
+
+func isThinEnhanceDescription(desc, name string) bool {
+	desc = strings.TrimSpace(desc)
+	if desc == "" || desc == "<nil>" {
+		return true
+	}
+	return descriptionEchoesTitle(desc, name)
+}
+
 // RenderProductEnhancePrompts fills company/built-in templates with product variables.
 func RenderProductEnhancePrompts(systemTpl, userTpl, category, name, description, gtin, brandPrompt, language string, attrs map[string]any) (system, user string) {
 	attrsJSON := ""
@@ -49,5 +104,8 @@ func RenderProductEnhancePrompts(systemTpl, userTpl, category, name, description
 		// Safety net if a custom user template renders empty.
 		user = ProductEnhanceUser(category, name, description, attrs)
 	}
+	if isThinEnhanceDescription(description, name) {
+		user = thinEnhanceUserInstruction + "\n\n" + user
+	}
 	return system, user
 }