feedback7 R22-HUD: the HP bar shows the ammo skill's rounds as yellow cells (隐现 S2: 14), 伺夜's 狼影 left as diamonds and 斩业星熊's 我执 pool as a red bar — one snapshot change for PR #303 and #378 by @IceCodeNew and PR #383 by @Convey123; golden: unchanged

The three PRs patched the same snapshot and HUD lines (Grok's review: do not merge three diffs), so this is one design
built from their code and tests; IceCodeNew is the commit author (#303, #378), Convey123 co-author (#383).

- b.snap gains three optional, display-only lists beside the unchanged 9-field tuples (snapshot.js ammoView / wolfView /
  negView, called from battle/events.js snapshot(); a living, deployed, visible ally, only when it has one):
  ammo [[id, rounds left, magazine]] (whole rounds; the magazine is the activation's real total that unitTuple's SP
  fraction runs on, extras and refills included), wolves [[id, 狼影 left, talent maximum]] (mem.shadows of the new
  mem.wolfCapacity, set by tokens.js wolfPack and the managed vigil kit), neg [[id, fill]] (unit.negFill(), a function
  op-hsgma2.js sets: the pool is read when the snapshot is taken, no per-tick sync). UnitInfo.ammoSkill (an ally whose
  skill is an ammo magazine) is known from the first appearance: fx events run before the frame's sample, so the aura
  cannot wait for the first ammo row.
- render/interp.js keeps the lists per snapshot (malformed rows / unknown ids dropped) and sample() hands them out from the
  older snapshot like flags (they step with the skill flag); render/units.js draws them: the ammo magazine replaces the
  SP bar (a cell per round, thin cuts, exact fill, no cuts under 2 px a cell), a row of diamonds under the bars for the
  wolves (the element gauge row moves below), the red bar over the drained HP bar for the pool. An ammo skill draws no
  standing aura (rings.js _aura; the activation burst stays).
- PR #378's wolf-head avatars are NOT taken: the count is data (the talent text 至多3只, mem.shadows), the HUD art of the
  official counter is in no game data we have, so the pips are plain diamonds [ASSUMED look]. The PRs' own tests are
  folded in and extended (test/sim/hud-readouts.test.js, test/render/hud-readouts.test.js, op_hsgma2.test.js).
- Docs: network.md, SIM.md §9, client.md, PLAYING.md, types/core.js.
- Golden: unchanged (283 scenarios; the canon hashes units / down / elem only, no sim state moved).
- Tests: 4 + 14 new + 1 in op_hsgma2 (12), all fail on the parent; 344 related tests pass; lint 0 errors, typecheck,
  check:imports, docs tests.

Co-authored-by: Convey123 <Convey123@users.noreply.github.com>

server/sim/units.js

@@ -84,6 +84,9 @@ export class Unit {
     // a countdown summon's life on the field ({ from, until } battle times; content/tokens.js startCountdown, cleared by
     // every deployment): its bar shows the time left (snapshot.js unitTuple), its HP never moves (无敌 + 禁疗)
     this.countdown = null;
+    // a unit with a negative-HP pool (斩业星熊's 我执, kits/ops/op-hsgma2.js) sets this to a function returning the share of the
+    // pool's cap it holds (0–1): b.snap's `neg` list (snapshot.js negView) draws it as the red bar; display only
+    this.negFill = null;
     // knocked out, the unit lies — and redeploys — on its home tile instead of where it fell (Battle._layBody) while content
     // holds this: 乌尔比安 moved by his S3 (the owner's decision of 2026-10-07, a deviation from PRTS's "where it fell");
     // every deployment clears it (battle/deploy.js _deploy)