Fix paused SIM_STEP resume sequencing

doc-rtcp/xyzac-panel-button-parity-test-report.md

@@ -172,6 +172,26 @@ bash -n run-5axis-rtcp.sh
 
 本轮连续性修复后，`3D_Chips.ngc` 3000 tick 执行到第 337 行，`running_queue_gaps=0`；这证明长距离运行中的中间停顿已不再由 Worker 队列饥饿制造。
 
+暂停/恢复修复：暂停期间若有一个 `SIM_STEP` 已在浏览器与 Worker 之间传输，WASM protocol 现在接受该帧为稳定无动作轮询，不会消耗错误序号；随后 `PROGRAM_RESUME` 正常恢复 source TP。
+
+发布站点 r11 暂停/恢复验证：
+
+```text
+url: https://49.232.250.35:58010/
+release: 20260902-linuxcnc-wasm-pause-resume-r11
+resource_sha256: index-EXbw4yiL.js 6759738df285bc5e2f5c3fb84043dc09fb82292bbc1c3c1011a558c8654c96ab
+                  sim-worker-entry-DjXIMZ0D.js 190515af943d70e93037e88a5cf63b3b8e9cda675a8338cfc1fb4bb954bfd685
+                  linuxcnc-sim-core-D3Qw0e1g.wasm f1b1961279cf8ff7ef2e3fcd0068b3ba79de57abe1e56d5c32b16d17568b9536
+before_pause: line=62, tick=140, queue_depth=1, velocity=28.2842712475
+paused: line=62, tick=145, queue_depth=1, velocity=28.2842712475
+paused_after_1.5s: tick=145 (stable)
+resumed: line=62, tick=160, queue_depth=1, velocity=4.96408252063
+after_resume: line=68, tick=360, queue_depth=2, velocity=32.8295260060
+PROGRAM_RESUME: acknowledged; browser_errors: 0
+screenshot: /tmp/published-pause-resume-final-r11c.png
+screenshot_sha256: 9d1660fd043dd0628ff2989a3e139a3239acd6386d141657a5834c9d2f1bc5a7
+```
+
 发布站点 r10 连续性验证：
 
 ```text
@@ -249,6 +269,7 @@ wasm_io_c_source         09bce1430d6f71702ca0b3bf29ac50db377a6f232ce0d1a9b2c1eaa
 panel_button_test_source 80782fc1f85f88beb48ec3dfaf638a93f2edb912e694840199dbff504477fe74
 switchkins_direct_test_output 24e6cb8ec1195a97f71294b49217db0cbc0d7c3ecfa4bc8aa244ba3921c816a7
 panel_r10_output 9bddcd8b0219925e00598e081dc7a4ed0f4868e8822a21f0ccd08d8e9d355d45
+pause_resume_browser_screenshot 9d1660fd043dd0628ff2989a3e139a3239acd6386d141657a5834c9d2f1bc5a7
 ```
 
 报告对应提交前工作树保留了既有 coverage 大文件和 LinuxCNC 子模块改动；本轮提交包含 WASM TP/IO/HOME authority、无 JS JOG 运动计算、前端 pending 投影、长程序快照性能修正、聚合测试和本报告。