fix: squad KPS now averages per-player KPS instead of summing all kills

Previously sqKps = sumAllPlayerKills / games, inflating the value ~8x
since all 8 players' kills were summed before dividing by game count.
Now computed as the mean of each active player's individual kills/games.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

server.js

@@ -4468,7 +4468,10 @@ app.get('/api/squadrons/:squadronname', (req, res) => {
                         const sqCaptures = safeSummaryRow.total_captures || 0;
                         const sqKdr = sqDeaths > 0 ? (sqTotalKills / sqDeaths) : sqTotalKills;
                         const sqWinRate = sqBattles > 0 ? (sqWins / sqBattles) * 100 : 0;
-                        const sqKps = sqBattles > 0 ? parseFloat((sqTotalKills / sqBattles).toFixed(2)) : 0;
+                        const activePlayers = players.filter(p => p.total_battles > 0);
+                        const sqKps = activePlayers.length > 0
+                            ? parseFloat((activePlayers.reduce((sum, p) => sum + p.kps, 0) / activePlayers.length).toFixed(2))
+                            : 0;
                         loadPerformanceBenchmarksCached(dateFilters, (benchmarks) => {
                             const playerBenchmark = benchmarks.players;
                             const squadronBenchmark = benchmarks.squadrons;