缩短 Studio 叠字与重复说明，色标只保留量程

去掉 depth_empty 与无用选区峰值文案，并修正「视图 → 分析视频」。已用 locale 单测与 depth_scale_text 核对；含证据录制的 wiring 用例本机跳过。

apps/studio/tests/test_replay_analysis.py

@@ -1527,17 +1527,18 @@ def test_the_nothing_to_draw_line_names_the_action_that_produces_a_result():
     assert seen["zh_CN"] != seen["en_US"]
 
 
-def test_the_empty_depth_note_is_not_the_missing_depth_note():
-    """Both locales keep the two apart: a flat map is a reading, an absent one is not."""
+def test_depth_unavailable_is_a_short_absent_note():
+    """Both locales say the frame has no depth, without explaining zero vs absent."""
     from orisys_app_shared.i18n import set_locale
 
     try:
         for locale in ("zh_CN", "en_US"):
             set_locale(locale)
-            empty = t("panels.depth_empty", pixels=84000)
             absent = t("panels.depth_unavailable")
-            assert "84000" in empty or "84,000" in empty, empty
-            assert empty != absent
+            assert absent
+            assert "\n" not in absent, absent
+            scale = t("panels.depth_scale", low="0.000", high="1.000")
+            assert scale != absent
     finally:
         set_locale("zh_CN")