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/css/main.css

@@ -1374,6 +1374,30 @@ body.bg-phase-night.bg-weather-rain { background: linear-gradient(160deg, #080a0
   font-weight: 600;
 }
 
+.cell.animal.animal-cold {
+  filter: hue-rotate(-20deg) saturate(0.9) brightness(0.95);
+  box-shadow: inset 0 0 12px rgba(255, 255, 255, 0.25);
+}
+.cell.animal.animal-hot {
+  filter: hue-rotate(10deg) saturate(1.1) brightness(1.05);
+  box-shadow: inset 0 0 8px rgba(255, 100, 80, 0.3);
+}
+.cell.animal.animal-hungry {
+  opacity: 0.92;
+}
+.cell.animal.animal-hungry .cell-label::before {
+  content: "🍽️ ";
+  font-size: 0.5rem;
+}
+.cell.animal.animal-sick {
+  filter: saturate(0.6) brightness(0.85);
+  opacity: 0.9;
+}
+.cell.animal.animal-happy {
+  box-shadow: 0 0 12px rgba(255, 215, 0, 0.4);
+  filter: brightness(1.08) saturate(1.05);
+}
+
 .cell .cell-emoji {
   font-size: 1.4rem;
   display: block;
@@ -1445,6 +1469,18 @@ body.bg-phase-night.bg-weather-rain { background: linear-gradient(160deg, #080a0
   min-height: 0;
 }
 
+.season-toast {
+  padding: 6px 10px;
+  font-size: 0.9rem;
+  background: rgba(63, 185, 80, 0.15);
+  color: #238636;
+  border-radius: 6px;
+  margin-top: 4px;
+}
+.season-toast[hidden] {
+  display: none;
+}
+
 /* Bulles d'aide */
 .help-wrap {
   position: relative;