fix(quotes): harden quote -> rank -> pay pipeline across all providers

.gitignore

@@ -49,3 +49,7 @@ next-env.d.ts
 .agent/
 /documentation/
 /inspiration/
+provider-logs/
+
+# Local planning/specs — never commit
+docs/

src/app/api/quotes/route.ts

@@ -11,6 +11,7 @@ const quoteSchema = z.object({
   fromAddress: z.string().optional(),
   toAddress: z.string().optional(),
   fromTokenDecimals: z.number().optional(),
+  toTokenDecimals: z.number().optional(),
 })
 
 export async function POST(request: Request) {
@@ -31,10 +32,12 @@ export async function POST(request: Request) {
       fromTokenDecimals: params.fromTokenDecimals,
     })
 
-    return NextResponse.json({ 
-      success: true, 
+    return NextResponse.json({
+      success: true,
       routes: result.quotes,
       bestQuote: result.bestQuote,
+      unsupported: result.unsupported ?? false,
+      reason: result.reason,
       expiresAt: result.expiresAt,
       fetchedAt: result.fetchedAt,
       providerStats: result.providerStats,