fix(i18n): Spanish review fixes; report translations left in English

A screenshot review of the Spanish UI found:

- Text left in English. Catalog entries copied from English (Bloom,
  Cyber, Pin, NEWS, SITE, ON/OFF, RANGE, PITCH, HGT…) and the radio
  music genres, which never went through t(). The genres are translated
  in es and ru now.
- Wording: gender agreement, calques of the English, hints that name
  buttons that do not exist, and one concept worded two ways.
- Layout: the DESACTIVADO pill squeezed layer names until words broke
  mid-word; the scene and camera selects showed one word; a collapsed
  rail title pushed its button out of the card; the image slot line and
  a comparison readout were cut or split.

The layout fixes are scoped to languages other than English, so English
stays pixel-identical. Visual-style slider values now use the locale's
decimal separator (0,85).

npm run i18n now reports a translation that is identical to the
English, unless src/i18n/same-as-english.json lists it for that language
(codes, product names, words spelled the same).

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/ui/styleParameters.js

@@ -1,4 +1,12 @@
-import { t } from '../i18n/index.js';
+import { formatNumber, t } from '../i18n/index.js';
+
+/** A slider value in the UI language: 0.85 in English, 0,85 in Spanish. */
+const formatParam = (value, digits) =>
+  formatNumber(value, {
+    minimumFractionDigits: digits,
+    maximumFractionDigits: digits,
+    useGrouping: false,
+  });
 
 /**
  * Own generated parameter rows and their input listeners.
@@ -44,11 +52,14 @@ export function createStyleParameters({
         const digits = metadata.max <= 1 ? 2 : 1;
         const valueDisplay = documentRef.createElement('span');
         valueDisplay.className = 'param-value';
-        valueDisplay.textContent = parseFloat(slider.value).toFixed(digits);
+        valueDisplay.textContent = formatParam(
+          parseFloat(slider.value),
+          digits,
+        );
         const onInput = () => {
           const value = parseFloat(slider.value);
           writeValue(name, value);
-          valueDisplay.textContent = value.toFixed(digits);
+          valueDisplay.textContent = formatParam(value, digits);
           onChange();
         };
         slider.addEventListener('input', onInput);