feat(settings): serve every registered namespace and key plugin cards on it

A plugin that registered a settings namespace could not reach the browser
configuration page: the api-proxy filtered every read and gated every
write through two hardcoded namespace lists, and the plugin configuration
section rendered an unordered list of cards carrying an opaque id rather
than the namespace they edit. Both gates lived in this repository, so a
user-authored plugin was configurable only by hand-editing settings.yaml.

The proxy now serves whatever ctx.settings.describe() returns and adds no
boundary of its own; a name no registration answers folds into the seam's
own settings-rejected, and the settings-not-exposed code retires. The
settings seam is untouched: which client may read a namespace, and which
page renders it, are facts about consumers.

settings.plugin.item becomes a keyed slot whose key is the namespace a
card edits, following tool.call.toolview. The section reads describe once
and dispatches the intersection of the slot ledger and the served set, so
a namespace another surface owns renders nothing without declaring
anything, and a card for an uncomposed plugin is never dispatched.

packages/client/ui-plugin-config/tests/apply.client.spec.ts

@@ -13,12 +13,31 @@ import { apply, inject } from '@deepseek-ai/dsh-client-ui-plugin-config/client'
 // the shipped Chinese copy, so they state the browser they assume.
 usePinnedBrowserLanguages('zh-CN')
 
-async function bench() {
+/**
+ * @param served - namespaces the Host describes; omitted answers a failed read,
+ * which is what most of these specs want (no card has anything to render).
+ */
+async function bench(served?: string[]) {
   const ctx = new Context()
   await ctx.plugin(SlotsService).await()
   const locale = new LocaleService(ctx)
   ctx.provide('locale', locale)
   const describeCredentials = vi.fn(() => Promise.resolve({ rpcId: 'c', result: { ok: false, error: {} } }))
+  const describeSettings = vi.fn(() => Promise.resolve(served === undefined
+    ? { rpcId: 's', result: { ok: false, error: {} } }
+    : {
+      rpcId: 's',
+      result: {
+        ok: true,
+        value: {
+          writable: true,
+          hasDocument: true,
+          namespaces: served.map(ns => ({
+            ns, schema: {}, value: {}, applies: 'live', secrets: [], revision: 0,
+          })),
+        },
+      },
+    }))
   // The section binds its scopes through the Settings surface's service, and
   // forwarded Host events reach it through the same `$dispatch` handoff the
   // connection sink makes.
@@ -26,12 +45,12 @@ async function bench() {
   ctx.provide('connection', {
     isLoopback: true,
     api: {
-      settings: { describe: vi.fn(() => Promise.resolve({ rpcId: 's', result: { ok: false, error: {} } })) },
+      settings: { describe: describeSettings },
       credentials: { describe: describeCredentials },
     },
   } as never)
   await ctx.plugin(SettingsScopeService).await()
-  return { ctx, slots: ctx.get('slots') as SlotsService, describeCredentials }
+  return { ctx, slots: ctx.get('slots') as SlotsService, describeCredentials, describeSettings }
 }
 
 function declareRoot(slots: SlotsService): () => void {
@@ -56,26 +75,40 @@ describe('ui-plugin-config apply', () => {
     expect(section.options).toMatchObject({ id: 'plugins', order: 30 })
     // The nav label is a locale-following thunk; owners resolve it at read time.
     expect(resolveSlotLabel(section.options.label)).toBe('插件配置')
-    expect(slots.spec('settings.plugin.item')).toMatchObject({ kind: 'list', scope: 'root' })
+    expect(slots.spec('settings.plugin.item')).toMatchObject({ kind: 'keyed', scope: 'root' })
   })
 
-  it('registers one card per host-plane section it ships, in a stable order', async () => {
+  it('keys each card it ships on the settings namespace that card edits', async () => {
     const { ctx, slots } = await bench()
     declareRoot(slots)
 
     await ctx.plugin({ inject: [...inject], apply }).await()
 
-    expect(slots.entries('settings.plugin.item').map(entry => entry.options.id))
-      .toEqual(['bash', 'agent-loop', 'web-search'])
+    expect(slots.entries('settings.plugin.item').map(entry => entry.options.key))
+      .toEqual(['bash', 'agent-loop', 'web-search-deepseek'])
   })
 
-  it('injects a live card count and one business face per card', async () => {
-    const { ctx, slots } = await bench()
+  it('dispatches the served namespaces its cards claim, and no others', async () => {
+    // ui-theme is served but belongs to another surface, and a deployment
+    // composing no PowerShell/POSIX executor serves no `bash` at all.
+    const { ctx, slots } = await bench(['agent-loop', 'ui-theme', 'web-search-deepseek'])
     declareRoot(slots)
     await ctx.plugin({ inject: [...inject], apply }).await()
 
     const section = slots.entries('settings.section')[0]!
-    expect((section as { inject?: () => unknown }).inject?.()).toEqual({ cardCount: 3 })
+    const face = (section as { inject?: () => unknown })
+      .inject?.() as { hooks: { pluginConfigSection: { getSnapshot: () => { namespaces: string[] } } } }
+    await vi.waitFor(() => {
+      expect(face.hooks.pluginConfigSection.getSnapshot().namespaces)
+        .toEqual(['agent-loop', 'web-search-deepseek'])
+    })
+  })
+
+  it('injects one business face per card', async () => {
+    const { ctx, slots } = await bench()
+    declareRoot(slots)
+    await ctx.plugin({ inject: [...inject], apply }).await()
+
     for (const entry of slots.entries('settings.plugin.item')) {
       const face = (entry as { inject?: () => unknown }).inject?.() as { hooks: Record<string, unknown> }
       // Each card injects exactly one snapshot store plus its own actions.