Overhaul: something you can do about the ceiling

The ceiling was the only number in the game that moved one way, with no
counterplay at any price. In practice that reads less as a design
pillar than as a punishment you cannot answer - you watch the car get
permanently worse and there is nothing to *do* about it.

Press C at any base to strip and rebuild, worst subsystem first. It
buys ceiling and deliberately nothing else: an overhaul raises what the
car could be, and ordinary repair still has to fill it in. Early on
every part goes to repairs and there is never a surplus, so this is
invisible; it only becomes the thing to spend on once the ceiling is
what is actually holding you back.

The rate is the design, not the impossibility. 0.12 of ceiling per
part, against a full point of condition per part for a repair, so
undoing one crash's permanent cost runs about seven missions. Decline
is now something you can fight rather than only absorb.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/physics/physics.test.ts

@@ -21,6 +21,7 @@ const IDLE: DriverInput = {
   select: null,
   toggleMute: false,
   abandon: false,
+  overhaul: false,
 };
 
 /** Rapier runs headless, so vehicle tuning is checkable without a browser. */