feat(panel): implement player dashboard with stats and inventory

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

panel/src/pages/PlayerDashboard.tsx

@@ -1,3 +1,138 @@
-export default function PlayerDashboard({ userId }: { userId: string }) {
-    return <div className="text-text-tertiary">Player Dashboard — loading...</div>;
+import { useState, useEffect } from "react";
+import { get } from "../lib/api";
+import { Loader2 } from "lucide-react";
+
+interface UserData {
+    id: string;
+    username: string;
+    level: number;
+    xp: string;
+    balance: string;
+    className: string | null;
+}
+
+interface InventoryItem {
+    itemId: string;
+    name: string;
+    quantity: number;
+    rarity: string;
+}
+
+export default function PlayerDashboard({ userId }: { userId: string }) {
+    const [user, setUser] = useState<UserData | null>(null);
+    const [inventory, setInventory] = useState<InventoryItem[]>([]);
+    const [loading, setLoading] = useState(true);
+    const [error, setError] = useState<string | null>(null);
+
+    useEffect(() => {
+        async function load() {
+            try {
+                const [userData, invData] = await Promise.all([
+                    get<UserData>(`/api/users/${userId}`),
+                    get<{ items: InventoryItem[] }>(`/api/users/${userId}/inventory`).catch(() => ({ items: [] })),
+                ]);
+                setUser(userData);
+                setInventory(invData.items ?? []);
+            } catch (e) {
+                setError("Failed to load profile");
+            } finally {
+                setLoading(false);
+            }
+        }
+        load();
+    }, [userId]);
+
+    if (loading) {
+        return (
+            <div className="flex items-center justify-center py-16">
+                <Loader2 className="w-6 h-6 animate-spin text-text-tertiary" />
+            </div>
+        );
+    }
+
+    if (error || !user) {
+        return (
+            <div className="text-center py-16 text-sm text-text-tertiary">
+                {error ?? "Could not load your profile."}
+            </div>
+        );
+    }
+
+    return (
+        <div>
+            <h1 className="font-display text-lg font-semibold mb-6">Dashboard</h1>
+
+            <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-4 mb-6">
+                <StatCard label="Level" value={String(user.level)} accent="primary" subtitle={user.className ?? undefined} />
+                <StatCard label="Gold" value={formatNumber(user.balance)} accent="gold" />
+                <StatCard label="XP" value={formatNumber(user.xp)} accent="info" />
+                <StatCard label="Items" value={String(inventory.length)} accent="success" />
+            </div>
+
+            <div className="bg-card rounded-lg border border-border">
+                <div className="flex items-center gap-2 px-5 py-3 border-b border-border">
+                    <span className="text-sm font-semibold">Inventory</span>
+                    <span className="text-xs text-text-disabled">({inventory.length})</span>
+                </div>
+                {inventory.length === 0 ? (
+                    <div className="px-5 py-6 text-center text-sm text-text-tertiary">No items yet</div>
+                ) : (
+                    <div className="divide-y divide-border">
+                        {inventory.slice(0, 10).map((item, i) => (
+                            <div key={i} className="flex items-center justify-between px-5 py-3 hover:bg-raised/40 transition-colors">
+                                <div className="text-sm font-medium">{item.name}</div>
+                                <div className="flex items-center gap-2">
+                                    <span className={`text-[10px] font-semibold px-1.5 py-0.5 rounded ${rarityColor(item.rarity)}`}>
+                                        {item.rarity}
+                                    </span>
+                                    {item.quantity > 1 && (
+                                        <span className="text-xs text-text-tertiary font-mono">x{item.quantity}</span>
+                                    )}
+                                </div>
+                            </div>
+                        ))}
+                        {inventory.length > 10 && (
+                            <div className="px-5 py-2 text-xs text-text-disabled text-center">
+                                and {inventory.length - 10} more
+                            </div>
+                        )}
+                    </div>
+                )}
+            </div>
+        </div>
+    );
+}
+
+function StatCard({ label, value, accent, subtitle }: { label: string; value: string; accent: string; subtitle?: string }) {
+    const borderColor: Record<string, string> = {
+        primary: "border-l-primary",
+        gold: "border-l-gold",
+        info: "border-l-info",
+        success: "border-l-success",
+    };
+    return (
+        <div className={`bg-gradient-to-br from-card to-surface border border-border rounded-lg p-5 border-l-4 ${borderColor[accent] ?? ""}`}>
+            <div className="text-[11px] font-semibold uppercase tracking-wider text-text-tertiary">{label}</div>
+            <div className="text-2xl font-bold font-display tracking-tight mt-1">{value}</div>
+            {subtitle && <div className="text-sm text-text-tertiary mt-0.5">{subtitle}</div>}
+        </div>
+    );
+}
+
+function formatNumber(val: string): string {
+    const n = Number(val);
+    if (isNaN(n)) return val;
+    if (n >= 1_000_000) return `${(n / 1_000_000).toFixed(1)}M`;
+    if (n >= 1_000) return `${(n / 1_000).toFixed(1)}K`;
+    return n.toLocaleString();
+}
+
+function rarityColor(rarity: string): string {
+    switch (rarity?.toUpperCase()) {
+        case "C": return "bg-gray-500/20 text-gray-400";
+        case "R": return "bg-blue-500/20 text-blue-400";
+        case "SR": return "bg-purple-500/20 text-purple-400";
+        case "SSR": return "bg-amber-500/20 text-amber-400";
+        default: return "bg-gray-500/20 text-gray-400";
+    }
 }