Clear the last of the "ladder" vocabulary out of the handoff and the comments

Left over from the rename: the handoff still described opponent 2 as "rung N"
and pointed at matchRung, and three comments in gameplay.js still called the
opponent curve a ladder. One word per thing, everywhere now — OPPONENTS, WOUND
STAGES, a sprite FAMILY — with a note in the handoff saying which word replaced
what, so the next reader is not left translating.

(The barrel weapons keep their own "rungs of the same ladder" line: that one is
about the WEAPON payout order and was never part of the confusion.)

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

HANDOFF-MATCH.md

@@ -38,7 +38,7 @@ Oliver picked **A: blood-only**, of three options offered:
   blood already spent, and heals are how you last. **The measure becomes OPPONENTS FELLED.**
 - B — tennis-true: a lost game ends the run. Rejected for now (worth one playtest someday; it might
   be the mode's real personality).
-- C — hybrid, lost game drops a rung. Rejected.
+- C — hybrid, a lost game drops you an opponent. Rejected.
 
 **Important context for whoever implements this:** Oliver believed losing a match killed him
 ("i really die losing one match"). It does not — he was bleeding out during deuce wars and hitting
@@ -55,10 +55,12 @@ communicating its own rules. Model A only works if the player can see they are b
    same `endRun` with a mode tag — see "The record shape" below. The blood also got a readout, one
    pip per hit left beside the board, because the vignette says "worse" and never says "how many".
 
-2. ~~**Named opponent ladder**~~ **DONE, partly.** Rung N takes design N's name off the chapter
-   roster (`matchRung` in config) plus a personality that is DIALS — pace, width, flub, speed
-   scalings on numbers `racketAI` already reads. Name plate on the walk-on, board names it
-   (`short`), kills file under the rung so THE LADDER screen can list them.
+2. ~~**Named opponent list**~~ **DONE, partly.** Opponent N takes design N's name off the chapter
+   roster (`matchFoe` in config, rows in `config.OPPONENTS`) plus a personality that is DIALS — pace,
+   width, flub, speed scalings on numbers `racketAI` already reads. Name plate on the walk-on, the
+   board names it (`short`), and the kill files under it so the OPPONENTS FELLED screen can list it.
+   *(The word "ladder" was retired — it had come to mean the opponent list, the wound stages AND a
+   stats screen. One word per thing now: OPPONENTS, WOUND STAGES, and a sprite FAMILY.)*
    **Still open, and still the cheapest depth in the mode:** `shots[]` and the PARRY are fully built
    and completely unused here. A body-shot thrower is a personality no dial can express.
 
@@ -112,7 +114,7 @@ slots carry each MODE's own two numbers:
 
 `g` is what everything ranks on, so each mode's real measure goes in that slot and there is no second
 best stored anywhere to drift. `read(period, runs, mode)` filters; the stats screen is one function
-with three sets of words (BODY COUNT / THE LADDER / THE RECORD). The world board stays the gore
+with three sets of words (BODY COUNT / OPPONENTS FELLED / THE RECORD). The world board stays the gore
 mode's — it ranks kills in a run, and a five-body match would post a "5 kills" row next to a
 300-kill massacre. A tennis board would rank FELLED with points won as the tiebreak; that is a
 server change.
@@ -124,7 +126,7 @@ frame is picked off `racketAI`'s own `pose`, so the picture cannot drift from th
 
 Expansion ideas that survived discussion, in `PROJECT.md`'s LATER: the **tournament frame**
 (QUALIFYING → ROUND OF 16 → THE FINAL vs THE CHAMPION — gives the run a destination), the Hawk-Eye
-**challenge** as an earned continue, sudden-death deuce past a rung, doubles, and **item 7:
+**challenge** as an earned continue, sudden-death deuce past a given opponent, doubles, and **item 7:
 multiplayer** (ghost match first).
 
 ---