fix(tradein-ui): replace Tailwind with OKLCH tokens + a11y on disclaimer

Review-bot feedback on #517:
- tradein-mvp/frontend doesn't use Tailwind — classes (rounded-lg, bg-amber-50, …)
  rendered as plain unstyled text. Replace with inline styles using project's
  OKLCH design tokens (--accent-2, --accent-2-soft, --surface-2, --radius, --fg).
- Add role=status aria-live=polite on disclaimer for screen readers
- Move handleResubmit below resultData declaration (ESLint no-use-before-define)

tradein-mvp/frontend/src/app/page.tsx

@@ -59,12 +59,6 @@ export default function TradeInPage() {
     });
   }
 
-  function handleResubmit(patch: { house_type?: HouseType; repair_state?: RepairState }) {
-    if (!resultData) return;
-    const enrichedInput: TradeInEstimateInput = { ...resultData.input, ...patch };
-    handleSubmit(enrichedInput);
-  }
-
   const apiError = mutation.error?.message ?? null;
   const resultData =
     freshResult ??
@@ -81,6 +75,12 @@ export default function TradeInPage() {
         }
       : null);
 
+  function handleResubmit(patch: { house_type?: HouseType; repair_state?: RepairState }) {
+    if (!resultData) return;
+    const enrichedInput: TradeInEstimateInput = { ...resultData.input, ...patch };
+    handleSubmit(enrichedInput);
+  }
+
   const isPending = mutation.isPending;
 
   return (

tradein-mvp/frontend/src/components/trade-in/HeroSummary.tsx

@@ -102,8 +102,21 @@ export function HeroSummary({ estimate, input, onResubmit, isResubmitting = fals
   return (
     <article className="card hero-card">
       {showMockDisclaimer && (
-        <div className="rounded-lg border border-amber-500/40 bg-amber-50 px-4 py-3 text-sm text-amber-900" style={{ margin: "16px 16px 0" }}>
+        <div
-          Адрес распознан неточно — оценка может быть приближённой.
+          role="status"
+          aria-live="polite"
+          style={{
+            margin: "16px 16px 0",
+            padding: "12px 16px",
+            border: "1px solid var(--accent-2)",
+            background: "var(--accent-2-soft)",
+            color: "var(--fg)",
+            borderRadius: "var(--radius)",
+            fontSize: 13,
+            lineHeight: 1.4,
+          }}
+        >
+          ⚠️ Адрес распознан неточно — оценка может быть приближённой.
           Уточните адрес и пересчитайте для более точного результата.
         </div>
       )}
@@ -323,9 +336,19 @@ export function HeroSummary({ estimate, input, onResubmit, isResubmitting = fals
       )}
 
       {showEnrichment && (
-        <div style={{ margin: "0 16px 16px" }}>
+        <div
-          <div className="rounded-lg border border-slate-200 bg-slate-50 p-4 space-y-3">
+          style={{
-            <p className="text-sm font-medium" style={{ fontSize: 13, fontWeight: 600, marginBottom: 10 }}>
+            margin: "16px 16px 0",
+            padding: 16,
+            border: "1px solid var(--border, #e5e7eb)",
+            background: "var(--surface-2, #f8fafc)",
+            borderRadius: "var(--radius, 8px)",
+            display: "flex",
+            flexDirection: "column",
+            gap: 12,
+          }}
+        >
+          <p style={{ fontSize: 13, fontWeight: 500, margin: 0 }}>
             Уточните для повышения точности оценки:
           </p>
           <form onSubmit={handleEnrichSubmit}>
@@ -372,7 +395,6 @@ export function HeroSummary({ estimate, input, onResubmit, isResubmitting = fals
             </button>
           </form>
         </div>
-        </div>
       )}
     </article>
   );