feat: add equipment handler

backend/src/lib/handlers/equipment.ts

@@ -0,0 +1,22 @@
+import { route, HandlerContext, HttpError } from '@/lib/router';
+import { getDb } from '@/lib/db';
+
+route('player/:steamId/equipment', ['GET'], (ctx: HandlerContext) => {
+  const db = getDb();
+  const row = db.prepare('SELECT equipment FROM equipment WHERE steam_id = ?').get(ctx.params.steamId) as any;
+  return { equipment: row ? JSON.parse(row.equipment) : {} };
+});
+
+route('player/:steamId/equipment', ['PUT'], (ctx: HandlerContext) => {
+  const { equipment } = ctx.body as any;
+  const db = getDb();
+  db.prepare(`
+    INSERT INTO equipment (steam_id, equipment, updated_at) VALUES (?, ?, datetime('now'))
+    ON CONFLICT(steam_id) DO UPDATE SET equipment = ?, updated_at = datetime('now')
+  `).run(ctx.params.steamId, JSON.stringify(equipment || {}), JSON.stringify(equipment || {}));
+  return { success: true };
+});
+
+route('player/:steamId/equipment/drop', ['POST'], (ctx: HandlerContext) => {
+  return { success: true };
+});