feat: listings view with useListings hook and table

app/src/app/listings/page.tsx

@@ -0,0 +1,5 @@
+import { ListingsTable } from '@/components/ListingsTable'
+
+export default function ListingsPage() {
+  return <ListingsTable />
+}

app/src/components/ListingsTable.tsx

@@ -0,0 +1,123 @@
+'use client'
+
+import { useState } from 'react'
+import { useRouter } from 'next/navigation'
+import { useListings } from '@/hooks/useListings'
+import { Badge, STATUS_COLORS } from '@/components/ui/Badge'
+import { abbrev, fmtSol, fmtTok } from '@/lib/format'
+import type { ListingAccountWithPda } from '@solisting/sdk'
+
+type Filter = 'all' | 'active' | 'inactive'
+
+function priceLabel(listing: ListingAccountWithPda['data']): string {
+  const cur = listing.canonicalCurrency
+  if (cur.__kind === 'Sol') return fmtSol(listing.price)
+  return fmtTok(listing.price, cur.decimals, 'SPL')
+}
+
+export function ListingsTable() {
+  const router = useRouter()
+  const { data: listings = [], isLoading, error } = useListings()
+  const [filter, setFilter] = useState<Filter>('all')
+  const [sellerFilter, setSellerFilter] = useState('')
+
+  const rows = listings.filter((l) => {
+    if (filter === 'active' && !l.data.isActive) return false
+    if (filter === 'inactive' && l.data.isActive) return false
+    if (sellerFilter && !l.data.seller.toLowerCase().includes(sellerFilter.toLowerCase())) return false
+    return true
+  })
+
+  if (isLoading) {
+    return <div style={{ padding: 48, textAlign: 'center', color: 'var(--mut)' }}>Loading listings…</div>
+  }
+  if (error) {
+    return <div style={{ padding: 48, textAlign: 'center', color: 'var(--danger)' }}>{String(error)}</div>
+  }
+
+  const FILTERS: { key: Filter; label: string }[] = [
+    { key: 'all', label: 'All' },
+    { key: 'active', label: 'Active' },
+    { key: 'inactive', label: 'Inactive' },
+  ]
+
+  return (
+    <div>
+      {/* Header */}
+      <div style={{ display: 'flex', alignItems: 'flex-end', justifyContent: 'space-between', gap: 16, marginBottom: 22, flexWrap: 'wrap' }}>
+        <div>
+          <h1 style={{ margin: 0, fontSize: 26, fontWeight: 700, letterSpacing: '-.02em' }}>Listings</h1>
+          <p style={{ margin: '6px 0 0', fontSize: 13, color: 'var(--mut)' }}>
+            {listings.length} ListingAccount PDAs · solisting program
+          </p>
+        </div>
+        <div style={{ display: 'flex', gap: 10, alignItems: 'center' }}>
+          <input
+            value={sellerFilter}
+            onChange={(e) => setSellerFilter(e.target.value)}
+            placeholder="Filter by seller address"
+            style={{ height: 38, width: 220, padding: '0 13px', background: 'var(--bg3)', border: '1px solid var(--bd)', borderRadius: 10, fontSize: 13, fontFamily: 'var(--font-mono)', outline: 'none' }}
+          />
+          <div style={{ display: 'flex', background: 'var(--bg3)', border: '1px solid var(--bd)', borderRadius: 10, padding: 3 }}>
+            {FILTERS.map((f) => (
+              <button
+                key={f.key}
+                onClick={() => setFilter(f.key)}
+                style={{ padding: '6px 13px', borderRadius: 7, fontSize: 12.5, fontWeight: 600, color: filter === f.key ? 'var(--tx)' : 'var(--mut)', background: filter === f.key ? 'var(--bg2)' : 'transparent' }}
+              >
+                {f.label}
+              </button>
+            ))}
+          </div>
+        </div>
+      </div>
+
+      {/* Table */}
+      <div style={{ background: 'var(--bg2)', border: '1px solid var(--bd)', borderRadius: 'var(--radius)', overflow: 'hidden' }}>
+        <div style={{ display: 'grid', gridTemplateColumns: '2.4fr 1.1fr 1fr 1.1fr .8fr .9fr', gap: 14, padding: '13px 20px', borderBottom: '1px solid var(--bd)', fontSize: 10.5, fontWeight: 600, letterSpacing: '.12em', color: 'var(--mut)' }}>
+          <div>LISTING</div><div>SELLER</div><div>PRICE</div><div>AVAIL / TOTAL</div><div>ORDERS</div><div style={{ textAlign: 'right' }}>STATUS</div>
+        </div>
+
+        {rows.length === 0 && (
+          <div style={{ padding: 48, textAlign: 'center', color: 'var(--mut)', fontSize: 14 }}>
+            No listings match these filters.
+          </div>
+        )}
+
+        {rows.map((l) => {
+          const avail = l.data.quantity - l.data.quantityReserved
+          const statusKey = l.data.isActive ? 'active' : 'inactive'
+          const sc = STATUS_COLORS[statusKey]
+          return (
+            <div
+              key={l.address}
+              onClick={() => router.push(`/listing/${l.address}`)}
+              style={{ display: 'grid', gridTemplateColumns: '2.4fr 1.1fr 1fr 1.1fr .8fr .9fr', gap: 14, padding: '15px 20px', borderBottom: '1px solid var(--bdSoft)', cursor: 'pointer', alignItems: 'center' }}
+            >
+              <div style={{ minWidth: 0 }}>
+                <div style={{ fontWeight: 600, fontSize: 14, whiteSpace: 'nowrap', overflow: 'hidden', textOverflow: 'ellipsis' }}>
+                  {l.data.metadataUri || abbrev(l.address)}
+                </div>
+                <div style={{ fontFamily: 'var(--font-mono)', fontSize: 11, color: 'var(--mut)', marginTop: 3 }}>
+                  #{String(l.data.listingId)} · {abbrev(l.address)}
+                </div>
+              </div>
+              <div style={{ fontFamily: 'var(--font-mono)', fontSize: 12.5, color: 'var(--acc2light)' }}>
+                {abbrev(l.data.seller)}
+              </div>
+              <div style={{ fontWeight: 600, fontSize: 13.5 }}>{priceLabel(l.data)}</div>
+              <div style={{ fontSize: 13 }}>
+                <span style={{ fontWeight: 600 }}>{avail}</span>
+                <span style={{ color: 'var(--mut)' }}> / {l.data.quantity}</span>
+              </div>
+              <div style={{ fontSize: 13, color: 'var(--mut)' }}>{l.data.quantityReserved}</div>
+              <div style={{ textAlign: 'right' }}>
+                <Badge color={sc.color} bg={sc.bg}>{l.data.isActive ? 'Active' : 'Inactive'}</Badge>
+              </div>
+            </div>
+          )
+        })}
+      </div>
+    </div>
+  )
+}

app/src/hooks/useListings.ts

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+import { useQuery } from '@tanstack/react-query'
+import { useCluster } from '@solana/connector/react'
+import { createSolanaRpc } from '@solana/kit'
+import { fetchAllListings } from '@solisting/sdk'
+
+export function useListings() {
+  const { cluster } = useCluster()
+  return useQuery({
+    queryKey: ['listings', cluster?.id],
+    queryFn: () => {
+      const rpc = createSolanaRpc(cluster!.url)
+      return fetchAllListings(rpc)
+    },
+    enabled: !!cluster,
+    refetchInterval: 30_000,
+  })
+}