test(gui): settings package suites; ledger-judged re-registration

Full per-file coverage for the three settings packages: invariant
companions, store mirroring with revision guards, behavior-shaped
section/shell specs (props-fed, real store engine), and apply-level
suites on a real Context + SlotCore covering declaration-aware deferral
and HMR collapse recovery. All three registrants now judge presence on
the slot ledger instead of a local disposer, which went stale when a
parent redeclaration cascade removed the entry (ds-review-bot finding);
the locale re-register path keeps the same idempotence.

packages/client/ui-settings-general/tests/apply.spec.ts

@@ -0,0 +1,139 @@
+/** apply wiring: dictionary registration, declaration-aware section entry,
+ * snapshot projection into the slot store, locale-driven relabeling, and
+ * recovery after an HMR collapse of the declaring entry. */
+import { Context } from 'cordis'
+import { describe, expect, it } from 'vitest'
+import { SlotsService } from '@deepseek-ai/dsh-client-runtime/client'
+import { LocaleService } from '@deepseek-ai/dsh-client-locale/client'
+import { ThemeService } from '@deepseek-ai/dsh-client-ui-theme/client'
+import { apply, inject } from '@deepseek-ai/dsh-client-ui-settings-general/client'
+import type { GeneralSectionInjected } from '@deepseek-ai/dsh-client-ui-settings-general/client'
+import { GeneralSection } from '../src/client/GeneralSection.tsx'
+import type { createGeneralSettingsStore } from '../src/client/store.ts'
+
+const NS = 'settings.general'
+
+async function bench() {
+  const ctx = new Context()
+  await ctx.plugin(SlotsService).await()
+  const locale = new LocaleService(ctx)
+  const theme = new ThemeService(ctx)
+  ctx.provide('locale', locale)
+  ctx.provide('theme', theme)
+  return { ctx, slots: ctx.get('slots') as SlotsService, locale, theme }
+}
+
+/** Stand in for the settings shell: declare the section list slot from root. */
+function declareSection(slots: SlotsService): () => void {
+  return slots.register(
+    { name: 'root', children: { 'settings.section': { kind: 'list', scope: 'root' } } } as never,
+    () => null,
+  )
+}
+
+/** Mirror the framework's inject choreography: bake a real instance from the
+ * declared handle and hand its actions to the entry's inject factory. */
+function faceOf(slots: SlotsService) {
+  const entry = slots.entries('settings.section')[0]!
+  const handle = entry.store as ReturnType<typeof createGeneralSettingsStore>
+  const instance = handle.create()
+  const face = (entry.inject as unknown as (a: typeof instance.actions) => GeneralSectionInjected)(instance.actions)
+  return { entry, instance, face }
+}
+
+describe('ui-settings-general apply', () => {
+  it('declares the slot, locale, and theme services', () => {
+    expect(inject).toEqual(['slots', 'locale', 'theme'])
+  })
+
+  it('registers dictionaries and the section entry for declarations before or after apply', async () => {
+    const before = await bench()
+    declareSection(before.slots)
+    await before.ctx.plugin({ inject: [...inject], apply }).await()
+    const entry = before.slots.entries('settings.section')[0]!
+    expect(entry.component).toBe(GeneralSection)
+    expect(entry.options).toMatchObject({ id: 'general', order: 0, label: '通用设置' })
+    expect(before.locale.bind(NS)('nav')).toBe('通用设置')
+
+    const after = await bench()
+    const fiber = after.ctx.plugin({ inject: [...inject], apply })
+    await fiber.await()
+    expect(after.slots.entries('settings.section')).toHaveLength(0)
+    declareSection(after.slots)
+    await Promise.resolve()
+    expect(after.slots.entries('settings.section')[0]!.component).toBe(GeneralSection)
+    // Teardown without a live registration exercises the undefined-disposer arm.
+    await fiber.dispose()
+    expect(after.slots.entries('settings.section')).toHaveLength(0)
+  })
+
+  it('projects service snapshots into the store and routes face writes back', async () => {
+    const b = await bench()
+    declareSection(b.slots)
+    await b.ctx.plugin({ inject: [...inject], apply }).await()
+    // Events ahead of any inject hit the unbound-actions arm without a store.
+    b.theme.setTheme('dark')
+
+    const { instance, face } = faceOf(b.slots)
+    // The inject-time re-sync sealed the init window: both mirrors are current.
+    expect(instance.getSnapshot().localeActive).toBe('zh')
+    expect(instance.getSnapshot().localeOptions.map(l => l.id)).toEqual(['zh', 'en'])
+    expect(instance.getSnapshot().themePreference).toBe('dark')
+    expect(face.t('nav')).toBe('通用设置')
+
+    face.setLocale('en')
+    expect(b.locale.getLocale().active).toBe('en')
+    expect(instance.getSnapshot().localeActive).toBe('en')
+    expect(face.t('nav')).toBe('General')
+
+    face.setTheme('system')
+    expect(b.theme.getTheme().preference).toBe('system')
+    expect(instance.getSnapshot().themePreference).toBe('system')
+  })
+
+  it('re-registers with a fresh ledger label when the locale changes', async () => {
+    const b = await bench()
+    declareSection(b.slots)
+    await b.ctx.plugin({ inject: [...inject], apply }).await()
+    expect(b.slots.entries('settings.section')[0]!.options.label).toBe('通用设置')
+    b.locale.setLocale('en')
+    const entry = b.slots.entries('settings.section')[0]!
+    expect(entry.options.label).toBe('General')
+    expect(entry.component).toBe(GeneralSection)
+  })
+
+  it('recovers after an HMR collapse of the declaring entry (stale disposer must not block)', async () => {
+    const b = await bench()
+    const host = declareSection(b.slots)
+    await b.ctx.plugin({ inject: [...inject], apply }).await()
+    expect(b.slots.entries('settings.section')).toHaveLength(1)
+
+    // Collapse: the declarer dies, the cascade removes our entry while the
+    // apply closure still holds its (now stale) disposer.
+    host()
+    expect(b.slots.entries('settings.section')).toHaveLength(0)
+
+    // A locale change inside the collapsed window must stay quiet.
+    b.locale.setLocale('en')
+    expect(b.slots.entries('settings.section')).toHaveLength(0)
+
+    // Redeclaration restores the entry — with the current locale's label.
+    declareSection(b.slots)
+    await Promise.resolve()
+    const entry = b.slots.entries('settings.section')[0]!
+    expect(entry.component).toBe(GeneralSection)
+    expect(entry.options.label).toBe('General')
+  })
+
+  it('removes the entry and the dictionaries on teardown', async () => {
+    const b = await bench()
+    declareSection(b.slots)
+    const fiber = b.ctx.plugin({ inject: [...inject], apply })
+    await fiber.await()
+    expect(b.slots.entries('settings.section')).toHaveLength(1)
+    await fiber.dispose()
+    expect(b.slots.entries('settings.section')).toHaveLength(0)
+    // Dictionary disposal: translation falls back to the bare key.
+    expect(b.locale.bind(NS)('nav')).toBe('nav')
+  })
+})