## Summary

Refactors the i18n service to lazy-load locale files instead of bundling
all translations upfront. English is eagerly imported as the fallback
language, while all other locales are dynamically imported only when
needed. Updates Vite configuration to handle locale chunk naming and
service worker caching.

## Type of change

- [x] Refactor / code cleanup
- [x] CI / Build / Infrastructure

## Affected areas

- [x] Config / Settings
- [x] Other: Internationalization (i18n) and build optimization

## Details

### Changes to `src/services/i18n.ts`
- Eagerly imports English translation (`en.json`) as the fallback
language
- Replaces the static `LOCALE_LOADERS` object with `import.meta.glob()`
for dynamic locale loading
- Updates `ensureLanguageLoaded()` to handle both the eagerly-loaded
English and lazy-loaded locales
- Adds fallback logic to use English if a requested locale file fails to
load
- Simplifies `initI18n()` to use the pre-imported English translation

### Changes to `vite.config.ts`
- Adds `**/locale-*.js` to service worker `globIgnores` to prevent
precaching of lazy-loaded locale chunks
- Adds a new service worker cache strategy for locale files
(`CacheFirst` with 30-day expiration)
- Implements custom chunk naming in the build config to prefix
lazy-loaded locale files with `locale-` (excluding `en.json` which stays
in the main bundle)

## Benefits

- **Reduced initial bundle size**: Only English is bundled by default;
other locales load on-demand
- **Improved code splitting**: Each locale becomes a separate chunk that
can be cached independently
- **Better service worker handling**: Locale chunks are excluded from
precache and use appropriate caching strategies

## Checklist

- [x] TypeScript compiles without errors
- [x] No API keys or secrets committed

https://claude.ai/code/session_01Hd1kUsbZaAw5vzhBWS9Mkx

…riter

Resolves all 5 critical findings from the multi-agent code review of PR #2940.
End-to-end smoke test passes for all 8 regions with confidence=1.0.

P1 #166: health-seed-meta-not-in-keys-loops
  - Add regionalSnapshots to STANDALONE_KEYS in api/health.js
  - Without this, the SEED_META entry was dead wiring and the 12h staleness
    budget was unobservable. Same failure mode as the 'empty data ok keys
    bootstrap blind spot' the team has hit before.

P1 #167: oref-trigger-key-not-in-freshness-registry
  - Add relay:oref:history:v1 to FRESHNESS_REGISTRY (the canonical OREF key
    written by ais-relay, not the wrong intelligence:oref-alerts:v1 that the
    code was originally reading).
  - Update trigger-evaluator to read activeAlertCount/historyCount24h from
    the actual relay:oref:history:v1 payload shape.
  - oref_cluster trigger now fires when activeAlertCount > 10 (verified
    end-to-end against mock data).

P1 #168: zombie-freshness-registry-keys
  - Remove 4 freshness registry entries that no compute module reads:
    supply_chain:shipping_stress, energy:chokepoint-flows,
    intelligence:advisories-bootstrap, market:commodities-bootstrap.
  - These were dragging snapshot_confidence below 1.0 and wasting Redis
    pipeline reads. Add a header comment forbidding speculative entries.

P1 #169: diff-field-leaks-into-persisted-snapshot
  - Change computeSnapshot to return { snapshot, diff } separately so the
    diff is consumed locally for inferTriggerReason and never serialized
    into the persisted snapshot. The diff field was not part of the
    RegionalSnapshot type and would have broken Phase 1 proto codegen.
  - Update main() to destructure { snapshot } before persistSnapshot.

P1 #170: jsdoc-types-not-enforced-jsconfig-missing
  - Add scripts/seed-regional-snapshots.mjs and scripts/regional-snapshot/**
    to scripts/jsconfig.json's include array so tsc --checkJs validates the
    JSDoc @type annotations.
  - Add // @ts-check directive to all 14 .mjs files in the regional-snapshot
    pipeline.
  - Fix 4 type-safety bugs surfaced by enabling type-checking:
      actor-scoring: explicit ActorState[] type on local actors array; cast
        leverage_domains to ActorLeverageDomain[]; typed ActorRole return on
        inferRole.
      evidence-collector: explicit EvidenceItem[] type on local out array.
      scenario-builder: typed HORIZONS as ScenarioHorizon[] and LANE_NAMES
        as ScenarioName[].
      transmission-templates: cast tpl.affectedRegions to RegionId[] when
        building TransmissionPath objects.
  - Pre-existing seed-forecasts.mjs and _r2-storage.mjs errors (46 total)
    are not part of this PR's scope and remain untouched.

Verification
  - npx tsc --noEmit -p scripts/jsconfig.json: 0 errors in regional-snapshot files
  - npm run typecheck:all: clean
  - npm run test:data: 3946/3946 pass
  - tests/regional-snapshot.test.mjs: 50/50 pass
  - End-to-end smoke test: all 8 regions compute clean with confidence=1.0
  - Verified: oref_cluster trigger fires when activeAlertCount > 10
  - Verified: persisted snapshot has no diff field