Replace cheat-detection teleport with server reconciliation

The old PUNKBUSTER check compared client-reported position to server
position and snapped the player back when latency made them diverge,
which felt like getting teleported under any real network conditions.

Replaces that with proper client-side prediction + reconciliation:
client tags each input with a sequence number and keeps an input
buffer; server tracks the last processed sequence and reports its
authoritative position via a per-user inputAck alongside each
worldUpdate. The client only corrects when the actual disagreement
exceeds what the unacked input time can explain — so steady-state
movement runs purely on local physics, and only genuine unexpected
events (collisions, being hit) trigger a smooth blend toward the
server state.

Includes adaptive threshold scaling so high-latency sessions don't
false-positive corrections during normal running.

app/Game/Config/Settings.js

@@ -93,9 +93,10 @@ function () {
         CHANNEL_DEFAULT_LEVELS: ["debug"],
         CHANNEL_RECORD_SESSION: false,
 
-        // ME STATE
-        ME_STATE_MAX_DIFFERENCE_METERS: 1,
-        PUNKBUSTER_DIFFERENCE_METERS: 1
+        // RECONCILIATION
+        RECONCILIATION_THRESHOLD: 1,
+        RECONCILIATION_SNAP_THRESHOLD: 5.0,
+        RECONCILIATION_BLEND_FACTOR: 0.2
     };
 
     Settings.TILE_RATIO = Settings.ORIGINAL_TILE_SIZE / Settings.TILE_SIZE;