修复 Studio 失败测试并新增合并门禁

把丢失的 box 录像放回 apps/studio/tests/data/，修掉第 3 节 3–10 号与两处过时测试桩，
注册 timing 标记并让根目录收集零错误；新增 tools/gate.ps1 与可选的 pre-push 钩子。
验证：studio 524 通过 19 跳过、shared 467 通过 18 跳过、ui_check 632 项 0 失败、gate.ps1 退出码 0。
细节见 docs/test-repair-plan.zh.md。

apps/studio/config/locales/en_US.json

@@ -143,7 +143,7 @@
     "reset_display": "Reset display",
     "reset_display_tip": "Clear the accumulated display: the curves, cursor and value cards go back to their defaults and the replay returns to the start of the recording. There is no device session in this view, so nothing of the device is touched; the 3D camera is View ▸ Reset views (F8).",
     "pause": "⏸  Pause",
-    "pause_tip": "Pause computation; the picture holds and the device stays connected (F7).",
+    "pause_tip": "Pause computation; the picture holds and the device stays connected (F7). A pause leaves a gap in the recording.",
     "resume_tip": "Resume the computation and the display (F7), from the newest frame.",
     "resume_label": "▶  Resume",
     "resume_label_tip": "Resume the computation and the display (F7): it carries on from the newest frame with the device still connected.",

apps/studio/config/locales/zh_CN.json

@@ -143,7 +143,7 @@
     "reset_display": "复位显示",
     "reset_display_tip": "清空累积的显示：曲线、游标与数字卡恢复默认，回放回到录像开头。本视图没有设备会话，不会改动设备；三维视角请用「视图 → 复位视图」（F8）。",
     "pause": "⏸  暂停",
-    "pause_tip": "暂停计算，画面停住，设备保持连接（F7）。",
+    "pause_tip": "暂停计算，画面停住，设备保持连接（F7）；跨过暂停的录制会留空档。",
     "resume_tip": "继续计算与显示（F7），从最新一帧接着跑。",
     "resume_label": "▶  继续",
     "resume_label_tip": "继续计算与显示（F7）：从最新一帧接着跑，设备保持连接。",