feat: enhanced leaderboard with floor/gold rankings and class info

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ui/leaderboard_view.go

@@ -0,0 +1,51 @@
+package ui
+
+import (
+	"fmt"
+
+	"github.com/charmbracelet/lipgloss"
+	"github.com/tolelom/catacombs/store"
+)
+
+func renderLeaderboard(byFloor, byGold []store.RunRecord, width, height int) string {
+	title := styleHeader.Render("── Leaderboard ──")
+
+	// By Floor
+	var floorSection string
+	floorSection += styleCoop.Render("  Top by Floor") + "\n"
+	for i, r := range byFloor {
+		if i >= 5 {
+			break
+		}
+		medal := fmt.Sprintf("  %d.", i+1)
+		cls := ""
+		if r.Class != "" {
+			cls = fmt.Sprintf(" [%s]", r.Class)
+		}
+		floorSection += fmt.Sprintf("  %s %s%s  B%d  %s\n",
+			medal, stylePlayer.Render(r.Player), styleSystem.Render(cls),
+			r.Floor, styleGold.Render(fmt.Sprintf("%dg", r.Score)))
+	}
+
+	// By Gold
+	var goldSection string
+	goldSection += styleCoop.Render("\n  Top by Gold") + "\n"
+	for i, r := range byGold {
+		if i >= 5 {
+			break
+		}
+		medal := fmt.Sprintf("  %d.", i+1)
+		cls := ""
+		if r.Class != "" {
+			cls = fmt.Sprintf(" [%s]", r.Class)
+		}
+		goldSection += fmt.Sprintf("  %s %s%s  B%d  %s\n",
+			medal, stylePlayer.Render(r.Player), styleSystem.Render(cls),
+			r.Floor, styleGold.Render(fmt.Sprintf("%dg", r.Score)))
+	}
+
+	footer := styleSystem.Render("\n[L] Back")
+
+	return lipgloss.Place(width, height, lipgloss.Center, lipgloss.Center,
+		lipgloss.JoinVertical(lipgloss.Center, title, "", floorSection, goldSection, footer))
+}