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/quests.js

@@ -18,15 +18,6 @@ function daySeed(dateKey) {
   return h;
 }
 
-/**
- * @param {import("./types.js").GameState} state
- * @param {number} level
- * @returns {number}
- */
-function _questReward(state, level) {
-  return GameConfig.Quests.RewardBase + level * GameConfig.Quests.RewardPerLevel;
-}
-
 /**
  * @param {import("./types.js").GameState} state
  * @returns {import("./types.js").Quest[]}
@@ -54,7 +45,9 @@ export function generateDailyQuests(state) {
   return state.quests;
 }
 
-/** @param {import("./types.js").GameState} state */
+/** @param {import("./types.js").GameState} state
+ * @returns {{ eggsPlaced: number, animalsSold: number, conveyorUpgrades: number, plotUpgrades: number, coinsEarned: number }}
+ */
 function getQuestProgress(state) {
   const s = state.stats ?? { eggsPlaced: 0, animalsSold: 0, conveyorUpgrades: 0, plotUpgrades: 0, coinsEarned: 0 };
   return {
@@ -66,6 +59,14 @@ function getQuestProgress(state) {
   };
 }
 
+const QUEST_PROGRESS_KEYS = {
+  questPlaceEggs: "eggsPlaced",
+  questSellAnimals: "animalsSold",
+  questUpgradeConveyor: "conveyorUpgrades",
+  questUpgradePlot: "plotUpgrades",
+  questEarnCoins: "coinsEarned",
+};
+
 /**
  * @param {import("./types.js").GameState} state
  * @returns {number} coins awarded from completed quests this tick
@@ -75,16 +76,10 @@ export function tickQuests(state) {
   const progress = getQuestProgress(state);
   let earned = 0;
   for (const q of state.quests ?? []) {
-    if (q.done) {
-      // already done
-    } else {
-      let current = null;
-      if (q.descriptionKey === "questPlaceEggs") current = progress.eggsPlaced;
-      else if (q.descriptionKey === "questSellAnimals") current = progress.animalsSold;
-      else if (q.descriptionKey === "questUpgradeConveyor") current = progress.conveyorUpgrades;
-      else if (q.descriptionKey === "questUpgradePlot") current = progress.plotUpgrades;
-      else if (q.descriptionKey === "questEarnCoins") current = progress.coinsEarned ?? 0;
-      if (current !== null && current !== undefined) {
+    if (!q.done) {
+      const progressKey = QUEST_PROGRESS_KEYS[q.descriptionKey];
+      const current = progressKey !== undefined ? (progress[progressKey] ?? 0) : null;
+      if (current !== null) {
         q.current = Math.min(current, q.target);
         if (q.current >= q.target) {
           q.done = true;