fix: câbler tous les effets arbre + cleanup dette Sprint 2

- double_click_chance + crit_click_chance câblés dans applyClick (RNG)
- auto_click câblé dans le tick (auto-pontes/s)
- unlock_generator (Résilience) → 1 Lac Mystique gratuit au prestige
- ponte_critique requires double_ponte (fix branche morte)
- achievement_scaling retiré (nœud absent), full_tree + symbiose fixés
- Particule feedback coloré (crit=ambre, double=violet)
- 99 tests (tous passent)

Frontend/src/store/useGameStore.ts

@@ -8,6 +8,8 @@ import {
   DEFAULT_STATE,
   applyIdleGains,
   applyClick,
+  getClickGain,
+  getAutoClicksPerSecond,
   buyGenerator,
   buyEvolutionNode,
   resetEvolutionTree,
@@ -66,6 +68,11 @@ interface GameStore {
   offlineReport: OfflineReport | null;
   dismissOfflineReport: () => void;
 
+  // Last click result (for particle feedback)
+  lastClickGain: number;
+  lastClickDouble: boolean;
+  lastClickCrit: boolean;
+
   // Derived (recalculated on tick)
   canPrestige: boolean;
   productionPerSecond: number;
@@ -135,6 +142,9 @@ export const useGameStore = create<GameStore>((set, get) => ({
   playSeconds: 0,
   ready: false,
   offlineReport: null,
+  lastClickGain: 0,
+  lastClickDouble: false,
+  lastClickCrit: false,
   canPrestige: false,
   productionPerSecond: 0,
 
@@ -147,6 +157,14 @@ export const useGameStore = create<GameStore>((set, get) => ({
       const updated = applyIdleGains(s.state, now);
       updated.lastOnline = now;
 
+      // Auto-click from evolution tree
+      const autoClicks = getAutoClicksPerSecond(updated.evolutionTree);
+      if (autoClicks > 0) {
+        const autoGain = getClickGain(updated) * autoClicks;
+        updated.resources += autoGain;
+        updated.lifetimeTadpoles += autoGain;
+      }
+
       // Check cosmetic unlocks every 5s
       if (s.playSeconds % 5 === 0) {
         const cosState = { inventory: updated.cosmeticInventory, equipped: updated.cosmeticEquipped };
@@ -170,12 +188,15 @@ export const useGameStore = create<GameStore>((set, get) => ({
   click: () => {
     if (!get().ready) return;
     set((s) => {
-      const updated = applyClick(applyIdleGains(s.state, Date.now()));
-      saveLocal(updated);
+      const result = applyClick(applyIdleGains(s.state, Date.now()));
+      saveLocal(result.state);
       return {
-        state: updated,
-        canPrestige: canPrestigeCheck(updated),
-        productionPerSecond: totalProductionPerSecond(updated),
+        state: result.state,
+        lastClickGain: result.gain,
+        lastClickDouble: result.isDouble,
+        lastClickCrit: result.isCrit,
+        canPrestige: canPrestigeCheck(result.state),
+        productionPerSecond: totalProductionPerSecond(result.state),
       };
     });
   },