fix: deduplicate click power formula via getClickPower()

Inline formula at Swarm Protocol calc replaced with canonical
getClickPower() call, satisfying guardrail rule 2 (single source
of truth for click power formula).

game.js

@@ -1146,8 +1146,7 @@ function updateRates() {
     // Swarm Protocol: buildings auto-code based on click power
     if (G.swarmFlag === 1) {
         const totalBuildings = Object.values(G.buildings).reduce((a, b) => a + b, 0);
-        // Compute click power using snapshot boost to avoid debuff mutation
-        const _clickPower = (1 + Math.floor(G.buildings.autocoder * 0.5) + Math.max(0, (G.phase - 1)) * 2) * _codeBoost;
+        const _clickPower = getClickPower();
         G.swarmRate = totalBuildings * _clickPower;
         G.codeRate += G.swarmRate;
     }