Initial commit v1

app/(app)/rounds/[id]/join/page.tsx

@@ -0,0 +1,43 @@
+import { createClient } from '@/lib/supabase/server'
+import { redirect, notFound } from 'next/navigation'
+import { JoinRound } from '@/components/round/join-round'
+
+export default async function JoinRoundPage({ params }: { params: Promise<{ id: string }> }) {
+  const { id } = await params
+  const supabase = await createClient()
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  const db = supabase as any
+
+  const {
+    data: { user },
+  } = await supabase.auth.getUser()
+  if (!user) redirect(`/login`)
+
+  const { data: round } = await db
+    .from('rounds')
+    .select(
+      `
+      id, name, date, holes_count, status, created_by,
+      course:courses (name),
+      tee:tees (name, color),
+      round_players (user_id)
+    `,
+    )
+    .eq('id', id)
+    .single()
+
+  if (!round) notFound()
+
+  // Already a member — go straight to the round
+  const alreadyJoined = round.round_players?.some(
+    (p: { user_id: string }) => p.user_id === user.id,
+  )
+  if (alreadyJoined) redirect(`/rounds/${id}`)
+
+  // Round must be in lobby to join
+  if (round.status !== 'lobby') {
+    redirect(`/dashboard`)
+  }
+
+  return <JoinRound round={round} userId={user.id} />
+}