Initial commit

**Motivations:**
- Initialisation du versionning git pour le projet

**Root causes:**
- N/A (Nouveau projet)

**Correctifs:**
- N/A

**Evolutions:**
- Structure initiale du projet
- Ajout du .gitignore

**Pages affectées:**
- Tous les fichiers

server/bot-tick.js

@@ -0,0 +1,58 @@
+/**
+ * Server-side bot tick: load bot zoos, run same logic as client tickBotZoos, persist.
+ * Uses web/js/bot-zoo.js so bot rules stay in one place.
+ */
+
+import { getBotZoosForTick, updateBotZooState, expireSaleListings, getActiveSaleListings, placeBid } from "./db.js";
+import { tickBotZoos } from "../web/js/bot-zoo.js";
+
+const BOT_TICK_INTERVAL_MS = 15 * 1000;
+let lastTickAt = 0;
+
+/**
+ * Run one bot tick and persist all bot zoos.
+ * @returns {Promise<void>}
+ */
+export async function runBotTick() {
+  const nowUnix = Math.floor(Date.now() / 1000);
+  const nowMs = Date.now();
+  const dt = lastTickAt > 0 ? Math.min((nowMs - lastTickAt) / 1000, 60) : 10;
+  lastTickAt = nowMs;
+
+  await expireSaleListings();
+
+  const botZoos = await getBotZoosForTick();
+  if (botZoos.length === 0) return;
+
+  const activeListings = await getActiveSaleListings();
+  for (const listing of activeListings) {
+    const minBid = (listing.best_bid_amount ?? listing.initial_price) + 1;
+    const bidders = botZoos.filter(
+      (z) => z.id !== listing.seller_zoo_id && (z.botState?.coins ?? 0) >= minBid
+    );
+    if (bidders.length > 0) {
+      const bidder = bidders[Math.floor(Math.random() * bidders.length)];
+      const result = await placeBid(listing.id, bidder.id, minBid);
+      if (result.ok) break;
+    }
+  }
+
+  const state = { worldZoos: botZoos };
+  tickBotZoos(state, nowUnix, dt);
+
+  for (const zoo of botZoos) {
+    await updateBotZooState(zoo.id, zoo.animalWeights, zoo.botState);
+  }
+}
+
+/**
+ * Start the periodic bot tick (call after server listen).
+ * @returns {void}
+ */
+export function startBotTickInterval() {
+  setInterval(() => {
+    runBotTick().catch((err) => {
+      console.error("bot tick failed", err);
+    });
+  }, BOT_TICK_INTERVAL_MS);
+}