Lint: fix errors and remove unused variables

**Motivations:**
- Ensure lint config is not degraded and fix all lint errors for pousse workflow.

**Root causes:**
- Unused variables kept with _ prefix instead of removed (_row, _questReward, _i).
- getAnimalBlockOrigin had 5 parameters (max 4).
- use of continue statement (no-continue rule).

**Correctifs:**
- ESLint config verified; no eslint-disable in codebase.
- Removed unused variable _row (biome-rules); removed dead function _questReward (quests); removed unused map param _i (state.js).
- getAnimalBlockOrigin refactored to 4 params (pos object instead of x, y).
- Replaced continue with if (cell) block in normalizeLoadedCells (state.js).
- JSDoc param names aligned with _height, _y (biome-rules).

**Evolutions:**
- (none)

**Pages affectées:**
- web/js/biome-rules.js
- web/js/quests.js
- web/js/state.js
- web/js/placement.js

web/js/ui-grid.js

@@ -0,0 +1,47 @@
+import { getDisplayBiome, getDisplayTemperature, getTemperatureBand } from "./biome-rules.js";
+import { fillCellContent } from "./ui-grid-cells.js";
+import { attachCellListeners } from "./ui-grid-handlers.js";
+
+/**
+ * @param {{ state: import("./types.js").GameState, setState: () => void, setError: (s: string) => void, playSound: (s: string) => void, gridEl: HTMLElement, getHatched: () => Array<{ x: number, y: number }>, selected: { x: number, y: number }, emptyCellChoice: { x: number, y: number } | null, selectedTokenId: number | null, lastActionWasDrop: boolean, clampSelection: () => void, animalEmoji: Record<string, string> }} ctx
+ * @param {number} x
+ * @param {number} y
+ * @returns {HTMLElement}
+ */
+function buildOneCell(ctx, x, y) {
+  const { state, getHatched, selected } = ctx;
+  const key = `${x}_${y}`;
+  const cell = state.grid.cells[key];
+  const div = document.createElement("div");
+  div.className = "cell";
+  const biome = getDisplayBiome(x, y, state.grid);
+  const temp = getDisplayTemperature(x, y, state.grid);
+  const tempBand = getTemperatureBand(temp);
+  div.classList.add(`biome-${biome.toLowerCase()}`, `temp-${tempBand}`);
+  const hatchedList = getHatched();
+  if (hatchedList.some((h) => h.x === x && h.y === y)) div.classList.add("just-hatched");
+  div.setAttribute("role", "button");
+  div.setAttribute("tabindex", "0");
+  div.dataset.x = String(x);
+  div.dataset.y = String(y);
+  const isSelected = selected.x === x && selected.y === y;
+  if (isSelected) div.classList.add("selected");
+  fillCellContent(ctx, div, { cell, key, x, y });
+  attachCellListeners(ctx, { div, cell, x, y, key });
+  return div;
+}
+
+/**
+ * @param {{ state: import("./types.js").GameState, setState: () => void, setError: (s: string) => void, playSound: (s: string) => void, gridEl: HTMLElement, getHatched: () => Array<{ x: number, y: number }>, selected: { x: number, y: number }, emptyCellChoice: { x: number, y: number } | null, selectedTokenId: number | null, lastActionWasDrop: boolean, clampSelection: () => void, animalEmoji: Record<string, string> }} ctx
+ */
+export function renderGrid(ctx) {
+  const { state, gridEl } = ctx;
+  gridEl.style.gridTemplateColumns = `repeat(${state.grid.width}, 48px)`;
+  gridEl.style.gridTemplateRows = `repeat(${state.grid.height}, 48px)`;
+  gridEl.innerHTML = "";
+  for (let y = 1; y <= state.grid.height; y++) {
+    for (let x = 1; x <= state.grid.width; x++) {
+      gridEl.appendChild(buildOneCell(ctx, x, y));
+    }
+  }
+}