feat: slot system + entries/priority/errorreport + typert generator

packages/client/ui-sidebar/src/client/SidebarRoot.module.css

@@ -227,11 +227,39 @@
   padding-left: 0;
 }
 
-/* Foot seat: a pure layout socket pinned under the region; the ui-settings
-   trigger row inside owns its own geometry (38px wide row / 36px rail
-   circle) and hover chrome. */
+/* Footer seats: Settings fills the left side and additive actions sit on the
+   right. Each occupant owns its button geometry and hover chrome. */
 .footArea {
   flex: none;
+  display: flex;
+  align-items: flex-end;
+  gap: 8px;
+}
+
+.settingsArea {
+  flex: 1;
+  min-width: 0;
+}
+
+.footerActions {
+  flex: none;
+  display: flex;
+  align-items: flex-end;
+}
+
+/* The 56px rail cannot hold two controls side by side. Keep both reachable in
+   the same footer, stacked in their original order. */
+.collapsed .footArea {
+  flex-direction: column;
+  align-items: center;
+  gap: 0;
+}
+
+.collapsed .settingsArea,
+.collapsed .footerActions {
+  flex: none;
+  display: flex;
+  justify-content: center;
 }
 
 @media (prefers-reduced-motion: reduce) {

packages/client/ui-sidebar/src/client/SidebarRoot.tsx

@@ -6,7 +6,7 @@
  * snap to the 56px rail (one icon each, same top-down order) fading in as the
  * slide ends. The workspace/session browsing region between the New Session
  * button and the foot is the `sidebar.workspaces` registrant's, and the foot
- * is the `sidebar.settings` registrant's; the shell hands them the wide flag
+ * holds `sidebar.settings` plus `sidebar.footer.action`; the shell hands them the wide flag
  * (plus an expand request callback for the browser).
  *
  * The column also owns whether the scroll regions nested in it draw a
@@ -177,9 +177,14 @@ export function SidebarRoot({
         })}
       </div>
 
-      {/* Foot seat: ui-settings registers the trigger row + panel here. */}
+      {/* Footer: Settings stays on the left; optional actions sit beside it. */}
       <div className={css.footArea}>
-        {renderSlot('sidebar.settings', { wide })}
+        <div className={css.settingsArea}>
+          {renderSlot('sidebar.settings', { wide })}
+        </div>
+        <div className={css.footerActions}>
+          {renderSlot('sidebar.footer.action', { wide })}
+        </div>
       </div>
     </div>
   )

packages/client/ui-sidebar/src/client/contract/slots.ts

@@ -50,6 +50,12 @@ export interface SidebarSettingsOwnerProps {
   wide: boolean
 }
 
+/** Owner share of an action rendered beside Settings at the sidebar foot. */
+export interface SidebarFooterActionOwnerProps {
+  /** Whether the sidebar renders wide content (false = 56px rail). */
+  wide: boolean
+}
+
 /**
  * Registrant-private injected share (arrives via the register inject
  * factory). The shell keeps only its own controls: starting a Session from
@@ -72,5 +78,6 @@ export type SidebarRootInjected = {
  * seat. No store is registered.
  */
 export type SidebarRootComponentProps =
-  PropsRuntime<'sidebar'> & PropsRenderSlots<'sidebar.workspaces' | 'sidebar.settings'>
+  PropsRuntime<'sidebar'>
+  & PropsRenderSlots<'sidebar.workspaces' | 'sidebar.settings' | 'sidebar.footer.action'>
   & SidebarRootInjected & PropsLocale<'sidebar'>

packages/client/ui-sidebar/src/client/index.ts

@@ -6,7 +6,10 @@ import type { SidebarRootInjected } from './contract/slots.ts'
 import { SidebarRoot } from './SidebarRoot.tsx'
 import { en, zh, type SidebarKey } from './locales.ts'
 
-export type { SidebarRootComponentProps, SidebarRootInjected, SidebarSectionOwnerProps, SidebarSettingsOwnerProps } from './contract/slots.ts'
+export type {
+  SidebarFooterActionOwnerProps, SidebarRootComponentProps, SidebarRootInjected,
+  SidebarSectionOwnerProps, SidebarSettingsOwnerProps,
+} from './contract/slots.ts'
 export type { SidebarKey } from './locales.ts'
 
 declare module '@deepseek-ai/dsh-client-ui-slots' {
@@ -44,6 +47,7 @@ export function apply(ctx: ClientContext): void {
       children: {
         'sidebar.workspaces': { kind: 'single', scope: 'root' },
         'sidebar.settings': { kind: 'single', scope: 'root' },
+        'sidebar.footer.action': { kind: 'list', scope: 'root' },
       },
       inject: injectProps,
     }, SidebarRoot),

packages/client/ui-sidebar/tests/apply.client.spec.tsx

@@ -31,11 +31,13 @@ describe('ui-sidebar apply', () => {
     expect(inject).toEqual(['slots', 'layout', 'sessions', 'workspaces', 'locale'])
   })
 
-  it('registers the shell and declares the browsing-region hole', async () => {
+  it('registers the shell and declares its child seats', async () => {
     const b = await bench()
     await b.ctx.plugin({ inject: [...inject], apply }).await()
     expect(b.slots.entries('sidebar')).toHaveLength(1)
     expect(b.slots.spec('sidebar.workspaces')).toEqual({ kind: 'single', scope: 'root' })
+    expect(b.slots.spec('sidebar.settings')).toEqual({ kind: 'single', scope: 'root' })
+    expect(b.slots.spec('sidebar.footer.action')).toEqual({ kind: 'list', scope: 'root' })
     // Copy rides the standard locale seat, not the inject face.
     expect(b.slots.entries('sidebar')[0]!.locale).toBe('sidebar')
     const injected = (b.slots.entries('sidebar')[0]!.inject as () => SidebarRootInjected)()
@@ -61,5 +63,6 @@ describe('ui-sidebar apply', () => {
     await fiber.dispose()
     expect(b.slots.entries('sidebar')).toHaveLength(0)
     expect(b.slots.spec('sidebar.workspaces')).toBeUndefined()
+    expect(b.slots.spec('sidebar.footer.action')).toBeUndefined()
   })
 })

packages/client/ui-sidebar/tests/sidebar-root.client.spec.tsx

@@ -1,7 +1,10 @@
 // @vitest-environment jsdom
 import { afterEach, describe, expect, it, vi } from 'vitest'
 import { cleanup, fireEvent, render, screen } from '@testing-library/react'
-import type { SidebarRootComponentProps, SidebarSectionOwnerProps, SidebarSettingsOwnerProps } from '../src/client/contract/slots.ts'
+import type {
+  SidebarFooterActionOwnerProps, SidebarRootComponentProps, SidebarSectionOwnerProps,
+  SidebarSettingsOwnerProps,
+} from '../src/client/contract/slots.ts'
 import { SidebarRoot } from '../src/client/SidebarRoot.tsx'
 import { en } from '../src/client/locales.ts'
 
@@ -23,17 +26,25 @@ function mountShell({ collapsed = false, width = 300 }: { collapsed?: boolean; w
   const toggleSidebar = vi.fn()
   let regionOwner: SidebarSectionOwnerProps | undefined
   let settingsOwner: SidebarSettingsOwnerProps | undefined
+  let footerActionOwner: SidebarFooterActionOwnerProps | undefined
   let current = { collapsed, width }
   const root = () => (
     <SidebarRoot
       collapsed={current.collapsed} width={current.width}
       useSessions={neverHook} useWorkspaces={neverHook}
       startSession={startSession} toggleSidebar={toggleSidebar} t={t}
-      renderSlot={((key: string, owner: SidebarSectionOwnerProps | SidebarSettingsOwnerProps) => {
+      renderSlot={((
+        key: string,
+        owner: SidebarFooterActionOwnerProps | SidebarSectionOwnerProps | SidebarSettingsOwnerProps,
+      ) => {
         if (key === 'sidebar.settings') {
           settingsOwner = owner
           return <div data-testid="settings-seat" data-wide={owner.wide} />
         }
+        if (key === 'sidebar.footer.action') {
+          footerActionOwner = owner
+          return <div data-testid="footer-action-seat" data-wide={owner.wide} />
+        }
         regionOwner = owner as SidebarSectionOwnerProps
         return <div data-testid="region" data-wide={owner.wide} />
       }) as SidebarRootComponentProps['renderSlot']}
@@ -51,6 +62,10 @@ function mountShell({ collapsed = false, width = 300 }: { collapsed?: boolean; w
       if (settingsOwner === undefined) throw new Error('settings owner not rendered')
       return settingsOwner
     },
+    footerActionOwner: () => {
+      if (footerActionOwner === undefined) throw new Error('footer action owner not rendered')
+      return footerActionOwner
+    },
     rerender(next: Partial<typeof current>) {
       current = { ...current, ...next }
       view.rerender(root())
@@ -75,6 +90,7 @@ describe('SidebarRoot shell', () => {
     expect(b.regionOwner().wide).toBe(true)
     // The settings seat rides the same wide flag (ui-settings renders the row).
     expect(b.settingsOwner().wide).toBe(true)
+    expect(b.footerActionOwner().wide).toBe(true)
     // Expanded: the request is a no-op (no accidental collapse).
     b.regionOwner().expandSidebar()
     expect(b.toggleSidebar).not.toHaveBeenCalled()
@@ -89,6 +105,7 @@ describe('SidebarRoot shell', () => {
     vi.advanceTimersByTime(200)
     b.rerender({})
     expect(b.regionOwner().wide).toBe(false)
+    expect(b.footerActionOwner().wide).toBe(false)
     expect(screen.getByTestId('region')).toBeTruthy()
     b.regionOwner().expandSidebar()
     expect(b.toggleSidebar).toHaveBeenCalledOnce()