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

web/js/zoo-nursery.js

@@ -0,0 +1,36 @@
+/**
+ * Nursery helpers: ordered keys and first free cell.
+ */
+
+/**
+ * Ordered nursery cell keys (by row then column) for consistent token assignment.
+ * @param {import("./types.js").GameState} state
+ * @returns {string[]}
+ */
+export function getNurseryCellKeysOrdered(state) {
+  const keys = [];
+  for (const [key, cell] of Object.entries(state.grid.cells)) {
+    if (cell && cell.kind === "nursery") keys.push(key);
+  }
+  keys.sort((a, b) => {
+    const [ax, ay] = a.split("_").map(Number);
+    const [bx, by] = b.split("_").map(Number);
+    return ay !== by ? ay - by : ax - bx;
+  });
+  return keys;
+}
+
+/**
+ * First nursery cell key that has no token and no pending baby. Returns null if none.
+ * @param {import("./types.js").GameState} state
+ * @returns {string | null}
+ */
+export function getFreeNurseryCellKey(state) {
+  const keys = getNurseryCellKeysOrdered(state);
+  const usedKeys = new Set((state.pendingBabies ?? []).map((p) => p.nurseryCellKey));
+  for (const key of keys) {
+    const cell = state.grid.cells[key];
+    if (cell && cell.kind === "nursery" && (cell.tokenId === null || cell.tokenId === undefined) && !usedKeys.has(key)) return key;
+  }
+  return null;
+}