feedback7: merge fb7-render — #382 赤刃明霄陈 S3 sword-qi drawn (sim chen3Wave fx), #381 enemy attack recovery held in interpolation, #380 push / pull slide (corpse stays where pushed; same-step kills finish the slide), #384 eye masks, 香槟炸弹 HP bar hidden, #246 an unwound attack plays its whole clip

- Conflicts with the merged fb7-hud (both added display-only snapshot lists): server/sim/battle/events.js, types/core.js,
  public/js/render/interp.js, docs/SIM.md, docs/design/network.md — union of ammo / wolves / neg and stand / standCut.
- Grok review: MERGE AFTER FIXES — the HIGH finding (same-step push kill) fixed on the branch (7a33bc7e).
- Golden: diy-073 / diy-074 (fx counts only; union OK); broad node --test 5442 (5441 pass, 0 fail, 1 skipped); lint 0
  errors; typecheck.

public/js/render/app.js

@@ -117,7 +117,7 @@ import { fxForm } from '../../../shared/protocol.js';
 import { Camera, presetCamera, lerpCamera, easeInOutCubic, pickTile, normRect } from './projection.js';
 import { SnapshotBuffer, frameTime } from './interp.js';
 import { TileField } from './tiles.js';
-import { UnitView, ItemView, DeviceView, FORMS } from './units.js';
+import { UnitView, ItemView, DeviceView, FORMS, syncView } from './units.js';
 import { FxSystem, ensureDamageFonts } from './fx.js';
 import { createDragController, pieceTile } from './drag.js';
 import { backdropTextures, shadowTexture, refreshTierChips, silhouetteTexture } from './textures.js';
@@ -1447,6 +1447,14 @@ export async function createFieldView(host, options = {}) {
           consumedIds.add(e[4].id);
           if (consumedIds.size > 200) consumedIds.delete(consumedIds.values().next().value);
         }
+        // 推拉: a push / pull (battle/displacement.js) moves the enemy inside one call; its `displace` fx carries the
+        // destination ['fx', 'displace', x, y, { id }] and the view slides there (UnitView.slideTo, PR #380) — normally
+        // started already by syncBattle's look-ahead, which this repeats harmlessly
+        if (e[1] === 'displace') {
+          const d = e[4] && typeof e[4] === 'object' ? e[4] : null;
+          const v = d && d.id != null ? views.get(d.id) : null;
+          if (v && v.slideTo) v.slideTo(Number(e[2]), Number(e[3]));
+        }
         // an enemy's mode change — the `form` of a sim setForm fx (shared/protocol.js fxForm: 掠海漂移体 → 爬行模式, user
         // playtest #5 item 1; 转译基底's forms, a 逐火 ember and its revival, the leaders' 重生, 守墓石像 — user report after
         // 0.1.0) — switches the view's clip set (UnitView.setForm; a kind without a clip set of that skeleton changes
@@ -1499,10 +1507,24 @@ export async function createFieldView(host, options = {}) {
     if (best) { tiles.flashObjective(best[0], best[1]); board3d?.flashObjective(best[0], best[1]); }
   }
 
+  /** syncBattle's look-ahead: a queued `displace` fx ['fx', 'displace', x, y, { id }] starts that view's slide. */
+  let slideAt = 0;
+  function startSlide(e) {
+    if (!Array.isArray(e) || e[0] !== 'fx' || e[1] !== 'displace') return;
+    const extra = e[4] && typeof e[4] === 'object' ? e[4] : null;
+    const v = extra && extra.id != null ? views.get(extra.id) : null;
+    if (v && v.slideTo) v.slideTo(Number(e[2]), Number(e[3]), { at: slideAt });
+  }
   let renderT0Battle = null;   // game time of the first rendered battle frame (spawn puffs skip the initial wave)
   let downSeq = 0;             // syncBattle pass counter: a view still marked down after a pass left the `down` list
   function syncBattle(renderT) {
     if (renderT0Battle == null) renderT0Battle = renderT;
+    // A push / pull's slide starts as soon as the interval sampled below ends on the snapshot that carries the
+    // destination: its `displace` fx is due only when renderT reaches that snapshot, and by then sample() has already
+    // lerped (≤ teleport) or snapped the enemy most of the way — no frames in between (PR #380). The fx are still queued
+    // here (processEvents took only those ≤ renderT); the view holds until `at`, then eases into the sim's position.
+    slideAt = interp.nextSnapT(renderT);
+    if (slideAt > renderT) interp.forEachUpcoming(renderT, slideAt, startSlide);
     interp.sample(renderT, sample);
     for (const [id, s] of sample) {
       let v = views.get(id);
@@ -1513,9 +1535,7 @@ export async function createFieldView(host, options = {}) {
       if (!v) v = battleView(id) || createUnknown(id, s);
       if (!v) continue;
       if (!v._seen) { v._seen = true; v.fadeIn = 0; }
-      if (v.alive || v.info?.kind === 'device') v.sync(s, renderT);
-      else if (v.dying > 0) { v.x = s.x; v.y = s.y; }
-      else if (s.anim !== ANIM.DIE && s.hp > 0) { v.revive?.(); v.sync(s, renderT); }
+      syncView(v, s, renderT);
     }
     // knocked-out operators waiting to redeploy (b.snap `down`, user playtest #4 item 9): their view stays on the
     // field knocked down under a redeploy ring (UnitView.setDown) — made on the spot for one already down when this
@@ -1586,8 +1606,9 @@ export async function createFieldView(host, options = {}) {
   // Crowded fields render skeletons through staggered RenderTexture impostors (units.js): the interval grows with
   // the number of Spine units so the per-frame vertex work stays roughly constant (hysteresis: re-evaluated
   // every 30 frames). Prep and ordinary fields keep full-rate direct rendering.
-  // Spine clipping masks (only eyeball clips on the current roster, invisible at chibi scale) each cost a stencil
-  // render-pass break (~2–5 ms of GPU on tiled GPUs): kept only for a lone clipped skeleton at high quality
+  // Spine clipping masks (the eyelids on the current roster) each cost a stencil render-pass break (~2–5 ms of GPU on
+  // tiled GPUs): kept only for a lone clipped skeleton at high quality; without them SpineActor hides the eyeball slots a
+  // closed lid would cut (GitHub #177, spine.js _eyeMaskFallback)
   let clipAllowed = true;
   function pickClipping() {
     let n = 0;