fix: close the review findings on the issue wave

Two reviewers over the #1345/#1348/#1349 wave; no blockers, two
majors, several minors — all fixed.

- La16 was still billed at 4 B/px: the no-conversion special case
  keyed on native_bpp == 4, which La16 also is — but only Rgba8 is a
  real move in into_rgba8, so La16's decode peak is 8. The case now
  keys on the color type, and a table test pins every layout's peak
  (plus GIF's screen+frame 8) so the accounting can't silently drift.
- A control-routed open of a damaged-but-recoverable drawing parked
  the operation behind the RecoveryPrompt modal (hang until the JS
  timeout, silent drop if another op arrived, or false success when a
  human declined). The open op now settles as failed with
  recovery_required and the parse error; the prompt stays for humans,
  automation can retry through the recovery flow.
- json_values_match: integers beyond f64 precision compared by value
  (a u64 could round-trip-match a float); integral pairs now compare
  exactly and mixed integer/float matches only when the float is whole
  and equals the integer.
- A queued web open settles with the explicit queued marker whenever
  the open slot was busy (the old name check made same-named in-flight
  opens look completed with an empty result).
- ocs-control.js resolves  with the API object reference, not
  window.ocsControl (undefined if the bridge already existed when the
  script ran); DATALINK on web says the typed path is superseded by
  the picker instead of silently discarding it; the wipeout depth test
  probes past the page background's rectangle; and the plot-path doc
  comment names the function it actually mirrors.

locales/ru-RU/opencadstudio.ftl

@@ -3580,6 +3580,7 @@ view =
     .opening-ocs-discussions-for-help-and-questions = Открытие OCS Дискуссии о помощи и вопросах
     .opening-ocs-web = Открытие OCS Веб-сайт
     .opening-the-command-reference = Открытие справочника команд...
+    .browser-cannot-open-typed-path = Браузер не может открыть введённый путь; выберите файл.
     .already-loaded-different-contents-kept = "__ocs_fmt_0__" уже загружен с другим содержимым; существующий файл сохранён.
     .opening-patreon-page = Открытие страницы Patreon...
     .opening-feedback-page = Открываем страницу обратной связи...