fix(hud): keep localized summary words whole and drop padding

- The proxy keeps combining marks, in-word apostrophes and name dots
  (ar vowel signs, fr d'Orléans, ja ・), normalizes to NFC, caps every
  summary in characters and cuts at a word boundary.
- feedState is nullable instead of a `none` token, and the summary has at
  most five words: "exactly five" made the model pad short views with
  "no data" or "unavailable".
- The HUD caches only the model's words and adds the current warning on
  every paint; an RTL locale gets a leading right-to-left mark.
- The echo check also rejects an all-Latin reply in a non-Latin language,
  translated layer ids and, with every feed healthy, the UNAVAILABLE word;
  places are matched by word and one-word layer names are skipped in
  Latin-script locales.
- The warning tag names the worst layers first; a partial analyst card
  shows one partial chip.

src/data/layerSnapshot.js

@@ -259,8 +259,9 @@ export function viewStateLayerRow(layer, options) {
 
 /**
  * The feed state and up to two layer names of a provenance envelope that is
- * not nominal, or null. Values stay English (`state` is a feed-state id,
- * `names` are `layer.name`); the HUD translates them for display.
+ * not nominal, or null; the worst layers come first, so the names match the
+ * state. Values stay English (`state` is a feed-state id, `names` are
+ * `layer.name`); the HUD translates them for display.
  * @param {{ overall?: string|null, layers?: Array<object> }|null} envelope
  * @returns {{ state: string, names: string[] }|null}
  */
@@ -271,6 +272,11 @@ export function provenanceTag(envelope) {
     .filter(
       (s) => s.feedState && s.feedState !== 'nominal' && s.feedState !== 'off',
     )
+    .sort(
+      (a, b) =>
+        (FEED_STATE_SEVERITY[a.feedState] ?? Infinity) -
+        (FEED_STATE_SEVERITY[b.feedState] ?? Infinity),
+    )
     .map((s) => String(s.name || s.id || 'LAYER'))
     .slice(0, 2);
   return { state: overall, names };

src/data/layerSnapshot.test.mjs

@@ -11,6 +11,7 @@ import {
   layerFeedState,
   layerSnapshot,
   layerSnapshots,
+  provenanceTag,
   snapshotAgeLabel,
   snapshotAgeSec,
   viewStateLayerRow,
@@ -293,3 +294,18 @@ test('age labels match the Data Layers meta clock', () => {
   assert.equal(snapshotAgeLabel(NOW - 240_000, NOW), '4m ago');
   assert.equal(snapshotAgeLabel(NOW - 7_200_000, NOW), '2h ago');
 });
+
+test('the warning tag names the layers in the reported state first', () => {
+  const tag = provenanceTag({
+    overall: 'unavailable',
+    layers: [
+      { name: 'Live Flights', feedState: 'partial' },
+      { name: 'Live AIS Vessels', feedState: 'partial' },
+      { name: 'CCTV', feedState: 'unavailable' },
+    ],
+  });
+  assert.deepEqual(tag, {
+    state: 'unavailable',
+    names: ['CCTV', 'Live Flights'],
+  });
+});