敌方血条偏高：头顶高度按"原点以上的高度"算（bounds.y + bounds.height），而不是包围盒高度

玩家反馈：逐腐兽的血条明显偏高。

原因：单位血条/名字牌的头顶高度用的是 spine setup-pose 包围盒的**高度**（units.js headTilesForUnit 里
`bounds.height × 1/320 × 模型系数 × 0.92`）。这个公式默认包围盒是**脚锚定**的 —— 大多数敌人确实如此
（猎狗pro y=−3.7、大鲍勃 y=−2.6，height 与"脚以上高度"几乎相等）。但有些模型的**原点在身体中间**：
逐腐兽的包围盒是 y=−404.7 / height=722.6，锏是 y=−798 / height=1183 —— 对它们，包围盒高度比可见顶端多出
大半个模型，于是血条被顶到上限 2.2 格（非 Boss）之上，看起来就是"明显偏高"。

改法：定位改用**原点以上的高度**（`Number.isFinite(b.y) ? b.y + b.height : b.height`，仍按 20…900 夹取）。
同时把这段计算从 UnitView 内联代码提成一个纯函数 `headTilesForUnit()`（放 units.js，紧挨 UNIT/EL_BAR 常量），
入参只有 isEnemy / isBoss / spineShown / bounds / modelK / modelKY，便于直接测；UnitView 仍然保留
"没显示 spine 就不看模型"的短路语义。spine.js 的 `height` getter 语义不变（别处也用它，例如替身的纵向拉伸）。

影响面（用真实 bounds 扫过 167 个有模型数据的敌人）：
  逐腐兽 / 疯狂的逐腐兽   1.85 → 0.81 格（降 1.03）
  锏（Boss）             2.59 → 1.11 格（降 1.48）
  萨卡兹大剑手 / 组长     1.54 → 1.23 格（降 0.31）
  枯朽之种 0.72 → 0.55、萨卡兹百夫长 1.51 → 1.34、妖怪MKII 0.71 → 0.55
  其余 103 / 167 个敌人的变化 ≤ 0.02 格（脚锚定模型几乎无感）

测试：
  test/render/bar-head.test.js（新增 5 条）：用真实的逐腐兽 / 猎狗pro / 大鲍勃 / 锏 包围盒断言新公式、
  夹取上限、以及三个回退分支（无 bounds 用 chibi 余量 × 系数、Boss 无模型用 2.2、干员与召唤物用固定余量），
  并做源码断言把"y + height"这条规则钉住。
  test/render/playtest6-enemies.test.js：两条 prefab 测试的期望值原本写死 `390 × …`（合成夹具的 bounds 是
  y=−150 / height=390，即当年就把这个 bug 当成了正确行为），现在改为从**被测 view 自己的 bounds** 推导
  （240 而不是 390），夹具本身不动。
  test/render 全量 552 项 / 546 通过 / 0 失败；test/ui + test/render 1279 项 / 1265 通过 / 0 失败。

未触碰 server/sim，test/golden 无变动。

public/js/render/units.js

@@ -228,6 +228,38 @@ export const ALIAS_TINT = Object.freeze({ enemy_1305_mhslim: 0xffc48a, enemy_130
  * between `pulse` and 1 at `pulseHz` (real time).
  */
 export const EL_BAR = Object.freeze({ icon: 0.15, min: 8, max: 15, enemy: 0.8, gap: 1, pulse: 0.45, pulseHz: 1.5 });
+
+/** The share of a model's height a bar is placed above (the head is not the very top of the silhouette). */
+export const HEAD_TOP_K = 0.92;
+/** Enemies whose model is taller than this many tiles keep their bar at the cap — a bar must stay on screen. */
+export const HEAD_TILES_CAP = 2.2;
+export const HEAD_TILES_CAP_BOSS = 3.2;
+
+/**
+ * Tiles above the feet where a unit's HP bar / name tag sits.
+ *
+ * Operators and tokens are uniform chibis (UNIT.headroom). Enemies vary: with a known model they use **how far the model
+ * reaches above its own origin** (spine.js `top` = `bounds.y + bounds.height`, not the box's raw height — a body whose
+ * origin sits mid-model, 逐腐兽, would otherwise push its bar ~a tile too high), scaled by the official model factor and
+ * the vertical-stretch quirk; without bounds they fall back to the chibi headroom × that factor.
+ * @param {{ isEnemy:boolean, isBoss:boolean, spineShown:boolean, bounds?:{y?:number,height?:number}|null, modelK:number, modelKY:number }} o
+ * @returns {number} tiles
+ */
+export function headTilesForUnit(o) {
+  const k = (Number.isFinite(o.modelK) ? o.modelK : 1) * (Number.isFinite(o.modelKY) ? o.modelKY : 1);
+  if (!o.isEnemy) return UNIT.headroom;
+  const cap = o.isBoss ? HEAD_TILES_CAP_BOSS : HEAD_TILES_CAP;
+  const b = o.spineShown ? o.bounds : null;
+  if (b && Number.isFinite(b.height) && b.height > 20) {
+    // how far the box reaches *above the origin*: 猎狗pro −3.7, 大鲍勃 −2.6 (feet-anchored, ≈ height), 逐腐兽 −404.7 of
+    // 722.6 and 锏 −798 of 1183 (origin mid-body). Using the raw height there put the bar about a tile too high.
+    const top = Number.isFinite(b.y) ? b.y + b.height : b.height;
+    return clamp(Math.min(Math.max(top, 20), 900) * UNIT.modelScale * k * HEAD_TOP_K, 0.55, cap);
+  }
+  if (o.isBoss) return HEAD_TILES_CAP;
+  if (o.spineShown) return clamp(UNIT.headroom * k, 0.55, HEAD_TILES_CAP);
+  return UNIT.headroom;
+}
 /**
  * The HP-bar readouts under the bars (b.snap `ammo`, `wolves`, `neg`; render/interp.js header):
  *  - AMMO_BAR — the ammo skill's segmented bar replaces the SP bar: a cell per round, `height` of the HP bar's thickness
@@ -1297,13 +1329,14 @@ export class UnitView {
       this.aura.scale.set((s * 1.3) / 128, (s * 1.9) / 128);
     }
 
-    // head height: operators/tokens are uniform chibis; enemies vary (setup-pose bounds, when known; else the chibi
-    // headroom × their official model factor)
-    let headTiles = UNIT.headroom;
-    if (this.isEnemy && spineShown && this.actor.entry.bounds) headTiles = clamp(this.actor.height * UNIT.modelScale * this.modelK * this.modelKY * 0.92, 0.55, this.isBoss ? 3.2 : 2.2);
-    else if (this.isEnemy && this.isBoss) headTiles = 2.2;
-    else if (this.isEnemy && spineShown) headTiles = clamp(UNIT.headroom * this.modelK * this.modelKY, 0.55, 2.2);
-    this._headTiles = headTiles;
+    // keep the original short-circuit: many views never build an actor (prep chips, diamonds, tests), so the model
+    // only counts when a spine is actually shown
+    const actor = spineShown ? this.actor : null;
+    const headTiles = this._headTiles = headTilesForUnit({
+      isEnemy: this.isEnemy, isBoss: this.isBoss, spineShown,
+      bounds: actor && actor.entry ? actor.entry.bounds : null,
+      modelK: this.modelK, modelKY: this.modelKY,
+    });
     this.screen.top = by - headTiles * s;
     this._updateHud(dt, s, bx, by - headTiles * s, alpha, t);
   }

test/render/bar-head.test.js

@@ -0,0 +1,67 @@
+// 敌方血条/名字牌的头顶高度：定位要用"原点以上的高度"（bounds.y + bounds.height），不是包围盒高度。
+// 数值取自 data/assets.json 里真实的 setup-pose bounds（逐腐兽 / 猎狗pro / 大鲍勃 / 锏）。
+import { test, describe } from 'node:test';
+import assert from 'node:assert/strict';
+import { readFileSync } from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const ROOT = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../..');
+// units.js 读的是浏览器全局的 PIXI（脚本标签加载），模块只在运行时碰它
+globalThis.PIXI = globalThis.PIXI || { Container: class {}, Graphics: class {}, Sprite: class {} };
+const { headTilesForUnit, HEAD_TILES_CAP, HEAD_TILES_CAP_BOSS } = await import('../../public/js/render/units.js');
+const { UNIT } = await import('../../public/js/render/style.js');
+
+/** The real setup-pose bounds (data/assets.json enemies.*.spine.bounds), with the official model factor. */
+const CASES = {
+  逐腐兽: { y: -404.687, height: 722.64, modelScale: 0.8889 },
+  疯狂的逐腐兽: { y: -404.687, height: 722.64, modelScale: 0.8889 },
+  猎狗pro: { y: -3.745, height: 257.006, modelScale: 0.963 },
+  大鲍勃: { y: -2.62, height: 408.999, modelScale: 1.1111, boss: true },
+  锏: { y: -798, height: 1183, modelScale: 1, boss: true },
+};
+const head = (name, extra = {}) => {
+  const c = CASES[name];
+  return headTilesForUnit({
+    isEnemy: true, isBoss: !!c.boss, spineShown: true, hasBounds: true,
+    bounds: { y: c.y, height: c.height }, modelK: c.modelScale, modelKY: 1, ...extra,
+  });
+};
+
+describe('敌方血条的头顶高度（bounds.y 不能忽略）', () => {
+  test('逐腐兽：原点在身体中间，血条按"原点以上" 0.8 格，而不是包围盒高度的 1.85 格', () => {
+    const tiles = head('逐腐兽');
+    assert.ok(Math.abs(tiles - 0.81) < 0.02, `逐腐兽 ≈ 0.81 格，实得 ${tiles.toFixed(3)}`);
+    assert.ok(tiles < head('逐腐兽', { bounds: { height: CASES.逐腐兽.height } }) - 0.9, '与忽略 bounds.y 的老算法差约一格');
+    assert.equal(head('疯狂的逐腐兽').toFixed(3), tiles.toFixed(3), '同一个模型，同样的高度');
+  });
+
+  test('脚锚定的敌人（y ≈ 0）几乎不变：猎狗pro / 大鲍勃', () => {
+    assert.ok(Math.abs(head('猎狗pro') - 0.71) < 0.01, `猎狗pro ≈ 0.71 格，实得 ${head('猎狗pro').toFixed(3)}`);
+    // y = −3.7（猎狗pro）时两种算法的差只有 0.01 格：脚锚定的模型几乎不受这次修正影响
+    assert.ok(Math.abs(head('猎狗pro') - head('猎狗pro', { bounds: { height: CASES.猎狗pro.height } })) < 0.02, 'y≈0 时两种算法几乎一致');
+    assert.ok(Math.abs(head('大鲍勃') - 1.31) < 0.02, `大鲍勃 ≈ 1.31 格，实得 ${head('大鲍勃').toFixed(3)}`);
+  });
+
+  test('上限仍然兜底：模型再高，血条也不会飞出屏幕', () => {
+    assert.ok(Math.abs(head('锏') - 1.11) < 0.02, `锏 ≈ 1.11 格（385/320×0.92），实得 ${head('锏').toFixed(3)}`);
+    assert.ok(head('锏') <= HEAD_TILES_CAP_BOSS);
+    assert.ok(head('逐腐兽') <= HEAD_TILES_CAP);
+    const absurd = headTilesForUnit({ isEnemy: true, isBoss: false, spineShown: true, bounds: { y: 0, height: 5000 }, modelK: 1, modelKY: 1 });
+    assert.equal(absurd, HEAD_TILES_CAP, '超过上限就截到上限');
+  });
+
+  test('回退分支：没有 bounds 用 chibi 头顶余量 × 模型系数；非敌方用固定余量；Boss 无模型用 Boss 高度', () => {
+    assert.equal(headTilesForUnit({ isEnemy: true, isBoss: false, spineShown: true, bounds: null, modelK: 1, modelKY: 1 }), UNIT.headroom);
+    assert.equal(headTilesForUnit({ isEnemy: true, isBoss: false, spineShown: true, bounds: null, modelK: 1.5, modelKY: 1 }), Math.min(HEAD_TILES_CAP, UNIT.headroom * 1.5));
+    assert.equal(headTilesForUnit({ isEnemy: true, isBoss: true, spineShown: false, bounds: null, modelK: 1, modelKY: 1 }), HEAD_TILES_CAP, 'Boss 没有模型时按 Boss 高度');
+    assert.equal(headTilesForUnit({ isEnemy: false, isBoss: false, spineShown: true, bounds: { y: 0, height: 500 }, modelK: 1, modelKY: 1 }), UNIT.headroom, '干员/召唤物一律用统一余量');
+  });
+
+  test('实现只有一处：纯函数算 y + height，units.js 把 bounds 交给它（防止有人改回 height）', () => {
+    const units = readFileSync(path.join(ROOT, 'public/js/render/units.js'), 'utf8');
+    assert.match(units, /const top = Number\.isFinite\(b\.y\) \? b\.y \+ b\.height : b\.height;/, 'top = y + height');
+    assert.match(units, /bounds: actor && actor\.entry \? actor\.entry\.bounds : null/, 'units.js 把 bounds 交给纯函数');
+    assert.match(units, /headTilesForUnit\(\{/, '而且用的就是它');
+  });
+});

test/render/playtest6-enemies.test.js

@@ -41,6 +41,12 @@ function view(info, opts) {
   return new U.UnitView(ctx, { id: 1, side: 'enemy', kind: 'enemy', tier: 1, x: 6, y: 10, maxHp: 1000, motion: 'FLY', ...info });
 }
 const width = (key) => A.enemies[key].spine.bounds.width;
+/**
+ * How far a model's setup-pose box reaches above its own origin (render/units.js headTilesForUnit): the bar clears the
+ * visible top, and these fixtures' synthetic box is deliberately not feet-anchored (y −150 of height 390 → 240 units),
+ * so a bar placed on the raw `height` would float 390/240 ≈ 1.6× too high.
+ */
+const topUnits = (v) => { const b = v.actor.entry.bounds; return Number.isFinite(b.y) ? b.y + b.height : b.height; };
 
 describe('#9 enemy models at their official prefab scale', () => {
   test('data: 威龙 0.16 / 0.27, 妖怪 0.20 / 0.27, 妖怪MKII 0.22 / 0.27; standard-size enemies carry none', () => {
@@ -69,8 +75,10 @@ describe('#9 enemy models at their official prefab scale', () => {
     assert.equal(U.enemyModelScale(E.enemy_1005_yokai_3), 0.5926);
     assert.equal(U.enemyModelScale(null), 1);
     assert.equal(U.enemyModelScale({ modelScale: 'x' }), 1);
-    // the HP bar sits on its (smaller) model: 390 units × 1/320 × 0.5926 × 0.92, clamped at 0.55
-    assert.ok(Math.abs(drone._headTiles - Math.max(0.55, 390 * UNIT.modelScale * 0.5926 * 0.92)) < 1e-9);
+    // the HP bar sits on its (smaller) model, on however far the setup-pose box reaches *above the origin*
+    // (bounds.y + bounds.height — feet-anchored models have y ≈ 0, 逐腐兽's origin is mid-body), × 1/320 × 0.5926 × 0.92,
+    // clamped at 0.55
+    assert.ok(Math.abs(drone._headTiles - Math.max(0.55, topUnits(drone) * UNIT.modelScale * 0.5926 * 0.92)) < 1e-9, `bar ${drone._headTiles}`);
     assert.ok(bird._headTiles > drone._headTiles);
   });
 
@@ -118,8 +126,8 @@ describe('official prefab quirks: vertical stretch and mirrored models', () => {
     assert.equal(U.enemyModelScaleY(null), 1);
     assert.equal(U.enemyModelScaleY({ modelScaleY: 'x' }), 1);
     assert.equal(U.enemyModelScaleY({ modelScaleY: 99 }), 1, 'absurd values fall back to uniform');
-    // the HP bar rides the stretched model: 390 units × 1/320 × 0.7037 × 1.263 × 0.92
-    assert.ok(Math.abs(drone._headTiles - 390 * UNIT.modelScale * 0.7037 * 1.263 * 0.92) < 1e-9, `bar ${drone._headTiles}`);
+    // the HP bar rides the stretched model: (bounds.y + bounds.height) × 1/320 × 0.7037 × 1.263 × 0.92
+    assert.ok(Math.abs(drone._headTiles - topUnits(drone) * UNIT.modelScale * 0.7037 * 1.263 * 0.92) < 1e-9, `bar ${drone._headTiles}`);
     assert.ok(drone._headTiles > plain._headTiles);
   });