接入 Studio 多点标定的会话置零与状态记录

支持显式无载荷置零、处理线程内切换模型及完整标定包快照。shared、界面检查与兼容测试通过；Studio 全量仍有一项回放停止时序测试失败。

apps/studio/config/locales/en_US.json

@@ -1,4 +1,18 @@
 {
+  "multical": {
+    "video_zero": "I confirm 30 frames from the reference frame are unloaded",
+    "video_zero_tip": "For models requiring a session zero. Measure it from this interval; tracker reference alone does not imply zero load.",
+    "zero": "Unloaded zero",
+    "zero_confirm": "Remove all load and keep the sensor unloaded for the next 30 processed frames. For video, pause at a known unloaded interval first. Measure a new session zero now?",
+    "zero_pending": "Measuring unloaded zero from 30 frames. Keep all load removed.",
+    "ok": "Ready",
+    "zero_unavailable": "Unloaded zero required",
+    "no_contact": "No contact",
+    "outside_coverage": "Outside calibration coverage",
+    "coordinate_unmapped": "Contact position unavailable",
+    "out_of_range": "Outside calibrated force range",
+    "invalid_input": "Invalid measurement"
+  },
   "app": {
     "title": "Orisys Studio",
     "about_title": "About",

apps/studio/config/locales/zh_CN.json

@@ -1,4 +1,18 @@
 {
+  "multical": {
+    "video_zero": "我确认从参考帧开始的 30 帧均无载荷",
+    "video_zero_tip": "适用于需要单独测量零点的模型。用此片段测量会话零点；选择跟踪参考帧本身不代表零载荷。",
+    "zero": "无载荷置零",
+    "zero_confirm": "请移除全部载荷，并在接下来 30 个处理帧内保持无载荷。使用录像时，请先暂停在已确认的无载荷片段。现在测量本次会话零点吗？",
+    "zero_pending": "正在用 30 帧测量零点，请保持无载荷。",
+    "ok": "有效",
+    "zero_unavailable": "需要无载荷置零",
+    "no_contact": "未检测到接触",
+    "outside_coverage": "超出标定覆盖区域",
+    "coordinate_unmapped": "接触位置无法映射",
+    "out_of_range": "超出标定力值范围",
+    "invalid_input": "测量无效"
+  },
   "app": {
     "title": "Orisys Studio",
     "about_title": "关于",