Time a tap from touch-down, and give the opponents' legs a knee

Oliver after step 1: much harder, stuck at the Steward, "trotz gutem
Timing nicht mehr bekommen". A tap only proves it is a tap when the
finger lifts, so the swing started 100-150 ms after he meant it; the old
volley window hid that, step 1's groundstrokes did not. A tap made on the
gold ring fell from q 0.82 to 0.09 (and a third were missed at 150 ms),
murky balls landed short and the opponent came in. The swing clock now
starts at the touch's age (rally modes only); flicks keep their crossing.

The opponents' legs had no ceiling: 7.3 m/s at the Runner, 15.7 at the
Champion against the player's ~6.2. Past legKnee (6 m/s) only 15% of the
growth survives, monotone, so the ladder order holds; champion ~7.5. v362.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/config.js

@@ -578,6 +578,9 @@ export const TUNE = {
                         // the peer gift; reaching parity earns all of it. Never a penalty.
   peerRun: 0.08,        // parity adds 8% legs on top of the permanent level bonus
   peerWindow: 0.12,     // ...and 12% contact window. Skill still wins; grinding opens the margin
+  legKnee: 6.0,     // m/s past which an opponent's legs stop growing at full rate (gameplay.knee) —
+                    // the player's auto-run is ~6.2. Was uncapped: the champion ran 15.7 m/s
+  legSoft: 0.15,    // ...and the share of the growth past the knee that survives (champion ~7.5)
   matchSpeedBase: 1.25, // racketAI speed multiplier for opponent ONE. 1.4 was calibrated against
                         // the broken recovery (the player never walked back to centre, so every
                         // wide return looked like opponent strength) — with real footwork restored