Merge remote-tracking branch 'origin/main' into german/hal-639-de

# Conflicts:
#	docs/CURRENT-STATE.md
#	docs/TRANSLATORS.md
#	src/i18n/i18n.test.mjs
#	src/i18n/index.js
#	src/i18n/locale.js
#	src/layers/cyclones/source.js
#	src/scenes/recipes.js
#	src/scenes/sceneTitleDisplay.test.mjs
#	src/ui/localePicker.test.mjs

src/data/aisLiveVessels.test.mjs

@@ -1719,3 +1719,50 @@ test('vessel selection passes the opaque source reference to optional history',
     aisLiveVesselsLayer.setSource(createVesselSource());
   }
 });
+
+test('vessel focus wire skips hidden sprites at rest while a target is tracked', () => {
+  const makeColor = (alpha) => ({ alpha, withAlpha: (next) => makeColor(next) });
+  const sprite = (show) => ({
+    position: { x: 1, y: 2, z: 3 },
+    show,
+    color: makeColor(1),
+  });
+  const visible = sprite(true);
+  const hidden = Array.from({ length: 50 }, () => sprite(false));
+  const records = [visible, ...hidden].map((billboard) => ({
+    position: billboard.position,
+    billboard,
+  }));
+  const target = {
+    screenRect: { left: 40, top: 40, right: 60, bottom: 60 },
+    paddingPx: 0,
+    cameraDistance: 1000,
+  };
+  let projected = 0;
+  let measured = 0;
+  const apply = (nowMs) =>
+    applyVesselFocusDeemphasis({
+      records,
+      target,
+      nowMs,
+      screenPositionFor: () => {
+        projected += 1;
+        return { x: 50, y: 50 };
+      },
+      cameraDistanceFor: () => {
+        measured += 1;
+        return 1200;
+      },
+      params: { paddingPx: 0, dimFloor: 0.25, attackMs: 300 },
+    });
+
+  apply(0);
+  const result = apply(300);
+
+  // Only the on-screen sprite pays for projection and distance.
+  assert.equal(projected, 2);
+  assert.equal(measured, 2);
+  assert.equal(visible.color.alpha, 0.25);
+  assert.equal(result.activeCount, 1);
+  for (const billboard of hidden) assert.equal(billboard.color.alpha, 1);
+});

src/data/focusDeemphasis.js

@@ -555,6 +555,21 @@ export function advanceFocusEvidenceNowMs(deltaMs) {
   return _focusEvidenceNowMs;
 }
 
+/**
+ * True when a sprite holds no dimming state, or has settled at full emphasis
+ * with nothing pending. Advancing such a sprite without a screen position (a
+ * hidden sprite) changes neither its state nor its alpha, so a layer pass may
+ * skip it.
+ * @param {object} sprite
+ * @returns {boolean}
+ */
+export function spriteFocusAtRest(sprite) {
+  const state = _spriteStates.get(sprite);
+  return (
+    !state || (state.factor === 1 && state.desired === 1 && !state.wasFarther)
+  );
+}
+
 /** Forget state when a primitive is removed from its owning collection. */
 export function forgetSpriteFocus(sprite) {
   if (sprite) _spriteStates.delete(sprite);

src/data/trafficPresetStyle.js

@@ -20,7 +20,7 @@
  *    jam keeps a size bump so queues read as fat beads.
  *  - `crt` (retro): saturated primaries that survive 10-level posterization
  *    plus an all-bucket size boost to out-shout the pixel grid.
- *  - `normal` (normal/anime/snow/unknown): every lookup returns null/0 —
+ *  - `normal` (normal/anime/unknown): every lookup returns null/0 —
  *    the shipped palette and sizing apply untouched.
  *
  * Sim/uncovered dots (bucket null/'sim') are NEVER restyled under any

src/data/trafficPresetStyle.test.mjs

@@ -13,7 +13,7 @@ const luma = ([r, g, b]) => (0.299 * r + 0.587 * g + 0.114 * b) / 255;
 
 const BUCKETS = ['free', 'slow', 'jam'];
 const MONO_STYLES = ['surveillance', 'thermal', 'noir'];
-const NORMAL_STYLES = ['normal', 'anime', 'snow', 'does-not-exist', '', undefined, null];
+const NORMAL_STYLES = ['normal', 'anime', 'does-not-exist', '', undefined, null];
 
 test('profile mapping: NVG/FLIR/noir are mono, retro is crt, everything else normal', () => {
   for (const s of MONO_STYLES) assert.equal(trafficStyleProfile(s), 'mono', s);

src/data/transitPresetStyle.js

@@ -18,7 +18,7 @@
  *    black sprite with a light ring is what a hot object looks like there.
  *  - `crt` (retro): saturated per-mode colours that survive posterisation,
  *    a size boost to out-shout the pixel grid, and a thinner halo.
- *  - `normal` (normal/anime/snow/unknown): every lookup returns the shipped
+ *  - `normal` (normal/anime/unknown): every lookup returns the shipped
  *    value — mode colour, shipped size, hairline edge only.
  *
  * Brackets are a different matter. The detection canvas composites ABOVE the

src/data/transitPresetStyle.test.mjs

@@ -17,7 +17,6 @@ test('profile mapping: NVG/FLIR/noir and cockpit nvg are mono, retro is crt, eve
   for (const plain of [
     'normal',
     'anime',
-    'snow',
     'minecraft',
     '',
     null,