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/default-grid-layout.js

@@ -0,0 +1,66 @@
+/**
+ * Shared default zoo grid layout: row 1 building cells and 3 starter couples (row 2).
+ * Used by state.js (defaultState) and prestige.js (doPrestige).
+ */
+
+import { LootTables } from "./loot-tables.js";
+import { fillAnimalBlock } from "./placement.js";
+
+/** Row 1 layout: (col, kind). Columns 1–6. */
+const ROW1_LAYOUT = [
+  [1, "research"],
+  [2, "billeterie"],
+  [3, "nursery"],
+  [4, "reception"],
+  [5, "food"],
+  [6, "school"],
+];
+
+/**
+ * Build default cells for row 1 (research, billeterie, nursery, reception, food, school).
+ * @returns {Record<string, { kind: string, level: number }>}
+ */
+export function buildDefaultRow1Cells() {
+  const cells = {};
+  for (const [col, kind] of ROW1_LAYOUT) {
+    cells[`${col}_1`] = { kind, level: 1 };
+  }
+  return cells;
+}
+
+/** Default animal ids for the 3 starter couples (one per biome: Meadow, Ocean, Mountain). */
+export const STARTER_ANIMAL_IDS_BY_BIOME = ["c0_r0", "c5_r0", "c10_r0"];
+
+/** Positions for the 6 starter animals (row 2, columns 1–6). */
+export const STARTER_ANIMAL_POSITIONS = [[1, 2], [2, 2], [3, 2], [4, 2], [5, 2], [6, 2]];
+
+/**
+ * Place 3 breeding couples (6 animals) on the grid. Mutates state.grid.cells.
+ * @param {import("./types.js").GameState} state
+ */
+export function addStarterAnimals(state) {
+  const now = Math.floor(Date.now() / 1000);
+  let idx = 0;
+  for (const animalId of STARTER_ANIMAL_IDS_BY_BIOME) {
+    const def = LootTables.Animals[animalId];
+    if (def !== null && def !== undefined) {
+      const w = def.cellsWide ?? 1;
+      const h = def.cellsHigh ?? 1;
+      for (let pair = 0; pair < 2 && idx < STARTER_ANIMAL_POSITIONS.length; pair++, idx++) {
+        const [x, y] = STARTER_ANIMAL_POSITIONS[idx];
+        fillAnimalBlock(state, x, y, {
+          kind: "animal",
+          id: animalId,
+          mutation: "none",
+          level: 1,
+          placedAt: now,
+          lastVisitedAt: now,
+          lastFedAt: now,
+          cellsWide: w,
+          cellsHigh: h,
+          fromOtherZoo: false,
+        });
+      }
+    }
+  }
+}