fix(catalog): show real material names, not categories, across quote views

New shared materialLabel() renders the global materials.name with brand/specs
appended only when not already part of the name (deduped; «؟» fallback kept).
Replaces the category-first composer in five places: supplier card badges
(CategoryPage), dashboard item lines (QuoteCard), ledger items summary,
project rows and purchase history. Also fixes the stale Units subtitle
«ضریب تبدیل همان دسته» → «ضریب تبدیل متریال» (category model kept).

frontend/src/pages/Dashboard/QuoteCard.tsx

@@ -5,7 +5,7 @@ import {
   isExpired,
   itemsSummary,
   materialById,
-  materialSpecs,
+  materialLabel,
   projectCell,
   quoteTotal,
   supplierById,
@@ -165,11 +165,10 @@ export function QuoteCard({ store, q, expanded, onToggleExpand, onAccept, onEdit
               <div className="flex flex-col gap-1 text-[11.5px] leading-5 text-muted">
                 {store.quotes.find((x) => x.id === q.id)?.line_items?.filter((li) => !li.rejected).map((li) => {
                   const m = materialById(store.materials, li.material_id);
-                  const specs = materialSpecs(m);
                   return (
                     <span key={li.id} className="flex items-center gap-1">
                       <span className="h-1.5 w-1.5 shrink-0 rounded-full bg-accent/40" />
-                      {m.category} {m.brand}{specs.length ? ` · ${specs.join(" · ")}` : ""}
+                      {materialLabel(m)}
                       <span className="text-[10px] text-muted/70">
                         {fmtNum(li.quantity)} {li.unit}
                       </span>