test(client): check what the chunk registers, and fix two defects in the checks

Three things, all about checks that had never met a real chunk.

`checkExternals.js` rejected slice 3's build outright, naming a fragment of
minified JSX as an imported specifier: a button reading "Approve and import"
puts the token immediately before a quote, and no regexp can tell that from a
statement. Same wall the server's `checkImports.js` hit, answered the same way —
a character walk. A mask rather than a rewrite, because a real import has its
keyword outside a string and its specifier inside one.

Writing the test for that false positive found the false NEGATIVE underneath
it: the pattern required whitespace after `import`, so it could not see
`import{useState}from"react"` — the one shape a minified build actually emits,
and the most likely way for a missed alias to reach production. It has never
been able to see it.

`registration.test.js` is new: stand up a fake `window.__rg` with a recording
registry and the real React, import the BUILT chunk, and read back what it
asked for. No DOM, because nothing renders. It holds the agreement that rots
quietly — every nav row points at a route this module actually registered —
rather than restating both lists.

CI now builds before it tests, because both of those read `dist/entry.js` and
skip without it. Run the other way round they are green and asking nothing.

Co-Authored-By: Claude <noreply@anthropic.com>

client/test/shardEvents.test.js

@@ -0,0 +1,74 @@
+import { test } from 'node:test'
+import assert from 'node:assert/strict'
+import { describe, categoryOf, kindLabel, CATEGORIES } from '../src/lib/shardEvents.js'
+
+// Unit-test the shared shard-event formatter — the single place that decides how
+// each event kind reads and which filter category it belongs to. These strings
+// are user-facing on the public Shard page, the Activity feed, and the admin
+// live feed, so a regression here is visible everywhere at once.
+
+// ── describe(): works on both stored (.payload) and live (top-level) frames ──
+test('describe reads fields from .payload when present, else the top level', () => {
+  const stored = { kind: 'quest.complete', payload: { who: { name: 'Ada' }, quest: 'The Cavern' } }
+  const live = { kind: 'quest.complete', who: { name: 'Ada' }, quest: 'The Cavern' }
+  assert.equal(describe(stored), 'Ada completed “The Cavern”')
+  assert.equal(describe(live), 'Ada completed “The Cavern”')
+})
+
+test('describe resolves an actor from name → acct → "Someone"', () => {
+  assert.equal(describe({ kind: 'mob.login', who: { name: 'Bob' } }), 'Bob entered the world')
+  assert.equal(describe({ kind: 'mob.login', who: { acct: 'acct7' } }), 'acct7 entered the world')
+  assert.equal(describe({ kind: 'mob.login', who: null }), 'Someone entered the world')
+  assert.equal(describe({ kind: 'mob.login', who: 'RawString' }), 'RawString entered the world')
+})
+
+test('describe pluralizes a vendor sale only when amount > 1 and formats the price', () => {
+  assert.equal(describe({ kind: 'vendor.sale', itemType: 'Katana', amount: 1, price: 1200 }), 'Katana sold for 1,200gp')
+  assert.equal(describe({ kind: 'vendor.sale', itemType: 'Arrow', amount: 40, price: 80 }), 'Arrow ×40 sold for 80gp')
+})
+
+test('describe includes the killer only when present (optional clause)', () => {
+  assert.equal(describe({ kind: 'player.death', who: { name: 'Ada' } }), 'Ada was slain')
+  assert.equal(
+    describe({ kind: 'player.death', who: { name: 'Ada' }, killer: { name: 'Orc' } }),
+    'Ada was slain by Orc',
+  )
+})
+
+test('describe champ.update branches on status and boss state', () => {
+  assert.equal(describe({ kind: 'champ.update', name: 'Rikktor', status: 'active', bossUp: true }), 'Rikktor: boss is up')
+  assert.equal(
+    describe({ kind: 'champ.update', name: 'Rikktor', status: 'active', level: 3 }),
+    'Rikktor is active — level 3',
+  )
+  assert.equal(describe({ kind: 'champ.update', name: 'Rikktor', status: 'cooldown' }), 'Rikktor is on cooldown')
+})
+
+test('describe falls back to the raw kind for an unknown event', () => {
+  assert.equal(describe({ kind: 'some.future.kind' }), 'some.future.kind')
+})
+
+// ── categoryOf(): membership + catch-all ────────────────────────────────
+test('categoryOf groups kinds per the CATEGORIES table, and unknowns are "other"', () => {
+  assert.equal(categoryOf('player.death'), 'pvp')
+  assert.equal(categoryOf('skill.gain'), 'progress')
+  assert.equal(categoryOf('house.decay'), 'world')
+  assert.equal(categoryOf('vendor.sale'), 'other') // deliberately not a public category
+  assert.equal(categoryOf('totally.unknown'), 'other')
+})
+
+test('every kind listed in CATEGORIES maps back to that category (table stays consistent)', () => {
+  for (const cat of CATEGORIES) {
+    if (!cat.kinds) continue
+    for (const kind of cat.kinds) {
+      assert.equal(categoryOf(kind), cat.id, `${kind} should be in ${cat.id}`)
+    }
+  }
+})
+
+// ── kindLabel(): badge text ─────────────────────────────────────────────
+test('kindLabel turns dots/underscores into spaces and tolerates empty input', () => {
+  assert.equal(kindLabel('player.death'), 'player death')
+  assert.equal(kindLabel('account.login.attempt'), 'account login attempt')
+  assert.equal(kindLabel(null), '')
+})