fix: close the review findings on the issue wave

Ported from d719fb77 (#1717); the hatch draw-order, PDF and
recovery-settle hunks stay out (main owns those paths).

- 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.
- json_values_match: an integer beyond f64 precision no longer matches
  a float it merely rounds onto; a mixed pair matches only when the
  float is whole and converts back to exactly that integer (also the
  fuzz finding of 9262d63f).
- ocs-control.js resolves `ready` with the API object instead of
  window.ocsControl, which is still undefined when the bridge already
  exists as the script runs (built before the first settle, avoiding
  the temporal-dead-zone throw of a later const); DATALINK on web says
  the typed path is superseded by the picker instead of silently
  discarding it.

(cherry picked from commit d719fb77)

src/app/commands/display.rs

@@ -1805,7 +1805,16 @@ impl OpenCADStudio {
                 // then runs from `DataLinkCsvPicked`.
                 #[cfg(target_arch = "wasm32")]
                 {
-                    let _ = path;
+                    // Say the typed argument is superseded — a silent
+                    // redirect looks like the input was lost.
+                    if !path.trim().is_empty() {
+                        self.command_line.push_info(
+                            crate::t!(
+                                "The browser cannot open a typed path; pick the file instead."
+                            )
+                            .as_ref(),
+                        );
+                    }
                     return Some(Task::perform(
                         crate::io::pick_datalink_csv_web(),
                         Message::DataLinkCsvPicked,