Split A1 category prompts canonically; retire attributes prompting

- Category enhance prompts (Sync A1 / seed-a1 / repair) now use the same
  three role sections as the rest of the platform: Title / Description /
  Meta. The retired "--- Attributes ---" role section is removed from the
  canonical template, the legacy-split overlay, and the web prompt editor;
  Category/Attrs stay as plain product-context lines (attribute extraction
  remains pipeline-level via AppendAttributeConstraints).
- Stored prompts still carrying an attributes section are detected by
  CategoryEnhancePromptNeedsRepair and rewritten on the next Sync.
- Legacy wp_product_categories.sql splits now also seed a default Slovenian
  metaTitle rule (dumps only carried <metaDescription>), so every A1
  category gets all four prompt areas: title formula, description
  sections, meta title, meta description.
- Role-sectioned prompts no longer imply the A1 SEO-omit cohort
  (CompanyOmitsSEOMeta): sectioned prompts are the canonical prompt-editor
  output for every tenant, and the sniff silently disabled SEO meta for
  any company that saved a category prompt.
- Verified locally: repair-category-prompts -apply updated 238 A1 +
  Platform Demo categories from scripts/seed/wp_product_categories.sql
  (216 legacy splits), idempotent on re-run, zero attributes sections
  left in DB.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

apps/api/internal/aiprompts/description_formula.go

@@ -38,12 +38,22 @@ func DescriptionTemplateNeedsRepair(template any) bool {
 	return strings.TrimSpace(f.MetaTitle) == "" && strings.TrimSpace(f.MetaDescription) == ""
 }
 
+// DefaultLegacyMetaTitleRule fills description_template.metaTitle for legacy A1
+// prompts, which only carried a <metaDescription> instruction. Mirrors the legacy
+// name-first Slovenian instruction style with the SEO title length bound.
+const DefaultLegacyMetaTitleRule = "Najprej napiši Novo ime izdelka in dodaj glavno prednost. Dolžina 50-60 znakov vključno s presledki."
+
 // DeriveDescriptionFormulaFromLegacyParts builds description_template from split
-// legacy DescriptionRules HTML + MetaRules.
+// legacy DescriptionRules HTML + MetaRules. Legacy dumps never carried a meta
+// title rule, so meta intent (MetaRules present) also seeds a default metaTitle
+// instruction — the category UI then shows all four prompt areas filled.
 func DeriveDescriptionFormulaFromLegacyParts(parts LegacyEnhanceParts) DescriptionFormula {
 	out := DescriptionFormula{
 		MetaDescription: strings.TrimSpace(parts.MetaRules),
 	}
+	if out.MetaDescription != "" {
+		out.MetaTitle = DefaultLegacyMetaTitleRule
+	}
 	body := strings.TrimSpace(parts.DescriptionRules)
 	if body == "" {
 		return out