Fix convoy coordination, AI combat and spectator recovery

tests/test_air_recon.py

@@ -29,9 +29,28 @@ int main(){
  vector away=StandOff({100,120,0},{0,0,0},{-40,0,0});assert(away.x>0);
  vector clear=StandOff({300,120,0},{0,0,0},{-40,0,0});assert(clear.x==-40);
  vector coincident=StandOff({0,120,0},{0,0,0},{0,0,0});assert(std::isfinite(coincident.x)&&coincident.x>0);
+ // Clearing the target area specifies a minimum outward SPEED, not a
+ // per-frame impulse. Repeated calls must not accelerate an already-safe
+ // radial velocity, even while the aircraft remains inside the radius.
+ vector outward{25,0,28};
+ for(int i=0;i<600;i++)outward=StandOff({100,120,0},{0,0,0},outward);
+ assert(std::abs(outward.x-25)<.001&&outward.z==28);
+ vector correction=StandOff({170,120,0},{0,0,0},{-40,0,28});
+ assert(std::abs(correction.x-5)<.001&&correction.z==28);
+ // The same stationary close-contact observation at different frame rates
+ // must not inject unbounded speed into the persistent smoothed velocity.
+ for(int hz: {30,60,120}){
+  vector v{-40,0,28};
+  for(int frame=0;frame<hz*5;frame++){
+   vector desired{-10,0,28};v=v+(desired-v)*(0.6f/hz);
+   v=StandOff({100,120,0},{0,0,0},v);
+   assert(v.Length()<40);
+  }
+ }
+
 }
 ''')
-print('PASS: original 15-minute launch/loss cadence, active/captured timer disarm, saved delay reset, stop, 300m orbit and close-contact standoff')
+print('PASS: original 15-minute launch/loss cadence, active/captured timer disarm, saved delay reset, stop, 300m orbit and bounded close-contact standoff at 30/60/120 Hz')
 
 # Explicit entity deletion must not leave an inactive launch deadline behind.
 removed=body(path,'void Removed(')