feedback5 WY: flying units hover 1.3 tiles (the client's 0.35 ÷ the standard prefab scale 0.27); the 帝国炮火先兆者 pair is drawn 1.263× taller and 木制瑞印 mirrored, as their official prefabs (from PR #211 by @xcdoge; the owner's decision of 2026-10-06)

Ported by hand from PR #211 by @xcdoge:
- render/units.js: FLY_HOVER 0.32 → 1.3, flat (the official fly offset is one model-independent Vector3(0, 0.35, 0) in
  the client's character space, whose unit is the standard battle-prefab scale 0.27; an official screenshot measures
  1.2–1.4 tiles); enemyModelScaleY multiplies the skeleton's Y scale and the head (bar) height, also in the impostor
  path; a mirrorX model flips on top of the direction flip. The body, its HP bar, damage numbers, projectile hits and
  skill rings ride `hover`, the shadow stays on the ground; one camera drives the units over the 2D and the 3D board.
- tools/build-data.mjs MODEL_STRETCH_Y / MIRRORED_PREFABS → enemies.json modelScaleY / mirrorX; data/enemies.json
  regenerated offline here (the PR's one-line blob was not taken) — JSON compare: only enemy_1112_emppnt /
  enemy_1112_emppnt_2 modelScaleY 1.263 and enemy_1196_msfyin mirrorX true.
- tools/local-extract/enemy_model_offsets.py (optional, host-side prefab reader) and
  docs/research/12-flying-visuals-official.md (without the claim that the owner said 「都要」 on 2026-10-05 — the owner's
  decision of 2026-10-06 is cited; where the quirk enemies appear corrected against 0.2.0's data: 帝国炮火先兆者 is a FLY
  special enemy of the mode, 帝国炮火中枢先兆者 comes with the bounty 战术特训·飞行III, 木制瑞印 is in no wave). No
  screenshot or extracted art committed.

Tests (from PR #211): test/render/unitview.test.js (FLY_HOVER ≈ 0.35 / 0.27; the same lift for every flyer; a flying
view lifts by FLY_HOVER — added here: its body and HP bar ride the lift, its shadow stays on the ground),
test/render/playtest6-enemies.test.js (the data keys; the 1.263 aspect and bar height; the mirrored model's x sign);
both fail without the renderer change; the 425 render unit tests pass. Docs: DATA §9, ASSETS, design client.md,
research 00 / 12, DESIGN §25.13.5 and the §25.10 table.
Golden unchanged (drawing only; the sim reads neither field).

test/render/playtest6-enemies.test.js

@@ -87,6 +87,55 @@ describe('#9 enemy models at their official prefab scale', () => {
   });
 });
 
+// The official's own model quirks, read from its battle prefabs (tools/local-extract/enemy_model_offsets.py, swept over
+// all 243 enemies of the mode 2026-10-05; PR #211 by @xcdoge, taken by the owner's decision of 2026-10-06):
+// `modelScale` only carries the horizontal product of Graphic / FaceSwitcher / Spine, so two enemies are stretched
+// vertically (帝国炮火先兆者 / 帝国炮火中枢先兆者: Graphic scale (0.19, 0.24, 0.24) → sy/sx = 1.263) and one is mirrored
+// (木制瑞印: sx −0.4, sy 0.4 → the official draws it flipped). The renderer applies the stretch to the skeleton's Y scale
+// (and to the bar height) and flips `flip` for a mirrored model, on top of the usual direction flip.
+describe('official prefab quirks: vertical stretch and mirrored models', () => {
+  test('data: exactly the two 先兆者 stretch, exactly 木制瑞印 mirrors', () => {
+    assert.equal(E.enemy_1112_emppnt.modelScaleY, 1.263);
+    assert.equal(E.enemy_1112_emppnt_2.modelScaleY, 1.263);
+    assert.equal(E.enemy_1196_msfyin.mirrorX, true);
+    assert.equal(E.enemy_1112_emppnt.modelScale, 0.7037, 'the horizontal product is unchanged');
+    for (const [k, e] of Object.entries(E)) {
+      if (e.modelScaleY != null) assert.ok(k === 'enemy_1112_emppnt' || k === 'enemy_1112_emppnt_2', `stretched: ${k}`);
+      if (e.mirrorX != null) assert.equal(k, 'enemy_1196_msfyin', `mirrored: ${k}`);
+    }
+  });
+
+  test('UnitView: the stretched pair is 1.263× taller than wide, its bar sits proportionally higher', async () => {
+    const drone = view({ defId: 'enemy_1112_emppnt' });
+    const plain = view({ defId: 'enemy_1005_yokai' });
+    await tick(); await tick();
+    for (const v of [drone, plain]) { assert.ok(v.spineReady); v.update(1 / 60, cam(), 0); }
+    const aspect = (v) => Math.abs(v.actor.spine.scale.y) / Math.abs(v.actor.spine.scale.x);
+    assert.ok(Math.abs(aspect(drone) - 1.263) < 1e-9, `先兆者 sy/sx ${aspect(drone)}`);
+    assert.ok(Math.abs(aspect(plain) - 1) < 1e-9, 'a uniform model stays 1:1');
+    assert.equal(U.enemyModelScaleY(E.enemy_1112_emppnt), 1.263);
+    assert.equal(U.enemyModelScaleY(E.enemy_1005_yokai), 1);
+    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}`);
+    assert.ok(drone._headTiles > plain._headTiles);
+  });
+
+  test('UnitView: a mirrored prefab is drawn flipped against an unmirrored model facing the same way', async () => {
+    const mirrored = view({ defId: 'enemy_1196_msfyin', motion: 'WALK' });
+    const normal = view({ defId: 'enemy_1007_slime', motion: 'WALK' });
+    await tick(); await tick();
+    for (const v of [mirrored, normal]) { assert.ok(v.spineReady); v.update(1 / 60, cam(), 0); }
+    assert.equal(mirrored.mirrorX, true);
+    assert.equal(normal.mirrorX, false);
+    assert.equal(mirrored.visFacing, normal.visFacing, 'both face the same way');
+    assert.equal(Math.sign(mirrored.actor.spine.scale.x), -Math.sign(normal.actor.spine.scale.x), 'the mirrored model flips');
+    assert.ok(Math.abs(mirrored.actor.spine.scale.y) > 0);
+  });
+});
+
 describe('#13 the self-feared “萨科塔之翼” turns left and right on screen', () => {
   test('real sim → snapshot buffer → UnitView: facing flips while it flutters, none while it flies its route', () => {
     const h = makeBattle({ seed: 3, autoFinish: false, timeLimit: 120, units: [] });