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/types.js

@@ -43,6 +43,9 @@
  *   laboratoryOffer?: { eggType: string, price: number, endAt: number } | null,
  *   prestigeLevel?: number,
  *   timeOfDay?: number,
+ *   gameDayTotal?: number,
+ *   lastSeason?: string,
+ *   seasonChangeMessage?: string,
  *   weather?: string,
  *   lastWeatherChangeAt?: number,
  *   quests?: Quest[],
@@ -72,7 +75,6 @@
  *   feedingRate?: number,
  *   reproductionScore?: number,
  *   attractivityScore?: number,
- *   attractivityScore?: number,
  *   reproductionTimers?: Array<{ keyA: string, keyB: string, animalId: string, dueAt: number }>,
  *   visitorArrivals?: VisitorEntry[],
  *   attractivityBonusFromIncidents?: number,