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.

scripts/format-scope.json

@@ -1110,6 +1110,7 @@
   "src/hudDms.test.mjs",
   "src/hudSummaryGate.test.mjs",
   "src/hudSummaryLine.test.mjs",
+  "src/testSupport/stubMgrs.mjs",
   "src/tools/queries/hud-caption-feed-state.test.mjs",
   "src/voice/hudPlaceLabels.test.mjs",
   "src/voice/panel/preferences.test.mjs",