实现 finger 单测点手动试验采集

将精确 UV 选点、实时预览与逐档人工确认接入同一页面，并保存每次试验的视频、事件和帧采集时间。通过离线视频、页面及记录回归测试。

apps/autocal/config/locales/en_US.json

@@ -224,7 +224,7 @@
     "tab_axes": "Axis debug",
     "tab_sequence": "Test sequence",
     "tab_finger": "Finger debug",
-    "tab_sensor": "Sensor",
+    "tab_sensor": "Calibration capture",
     "tab_surface": "Surface map",
     "tab_points": "Calibration points",
     "not_built": "Not built yet",
@@ -244,7 +244,7 @@
     "stop": "Stop",
     "idle": "Choose an input source and sensor.json",
     "no_frame": "Waiting for processed frames",
-    "preview_only": "Use this page to check the input image. Calibration trial recording is not connected yet.",
+    "preview_only": "Choose a U/V site first, then check the live 2D UV image here and record the trial.",
     "choose_video": "Choose Finger video",
     "choose_config": "Choose sensor.json",
     "video_filter": "Video files (*.mp4 *.avi *.mov *.mkv);;All files (*)",
@@ -262,6 +262,40 @@
     "basis_unknown": "read time (source unverified)",
     "frame": "Frame {frame} · source {source_frame} · {basis} {time} · dropped {dropped}"
   },
+  "calibration": {
+    "sensor_sn": "Sensor SN",
+    "output": "Output directory",
+    "site_view": "Select site",
+    "live_view": "Live 2D UV image",
+    "uv": "U / V (px)",
+    "position": "Mesh position",
+    "levels": "Load levels (N)",
+    "hold": "Suggested hold",
+    "reference": "Actual reference (N)",
+    "start": "Start recording",
+    "confirm": "Confirm level",
+    "finish": "Finish trial",
+    "abort": "Abort and keep data",
+    "load": "Load",
+    "unload": "Unload",
+    "next_step": "Next: {branch} to {load:g} N",
+    "no_step": "No step pending",
+    "progress": "Progress {done}/{total} · {status}",
+    "held": " · Current level held {seconds:.1f} s",
+    "source_state": "Input: {status} · frame {frame} · capture drops {dropped}",
+    "replay_note": "Video replay is for debugging; manual reference loads cannot be synced to the original experiment.",
+    "idle": "Idle",
+    "recording": "Recording",
+    "closing": "Writing files",
+    "complete": "Complete",
+    "incomplete": "Incomplete",
+    "result": "{status}: {path}",
+    "error": "Action failed: {detail}",
+    "invalid_site": "Select a valid UV site first",
+    "start_input": "Start camera or video input first",
+    "reference_required": "Enter the actual reference load",
+    "output_required": "Choose an output directory"
+  },
   "finger": {
     "title": "Finger calibration-point debug",
     "bundle_path": "Export bundle",