Fix lint findings and calibrate the seat trigger to the figma mock

- unused SessionId import and an unnecessary assertion in ui-model
- two over-length fake-api lines split
- trigger chrome calibrated against figma 313:14108's ToggleButton
  (13/20 medium secondary at 28px; chevron in label-caption = the mock's
  #ADB2B8; the mock's leading icon is invisible there, so the seat has
  none, and its 'High' effort text has no wire concept to render)

packages/client/connection/tests/fake-api.ts

@@ -104,7 +104,8 @@ export class FakeApiClient implements IApiClient {
   // Payloads stay `unknown` (lint-lane note above); response rows are the real
   // wire shapes so cases can program catalogs and skill lists without casts.
   onCommandList: (payload: unknown) => Promise<RpcResponse<{ commands: CommandDescriptor[] }>> = () => Promise.resolve(ok({ commands: [] }))
-  onCommandExecute: (payload: unknown) => Promise<RpcResponse<{ matched: boolean; result?: CommandExecuteResult }>> = () => Promise.resolve(ok({ matched: false }))
+  onCommandExecute: (payload: unknown) => Promise<RpcResponse<{ matched: boolean; result?: CommandExecuteResult }>> =
+    () => Promise.resolve(ok({ matched: false }))
   onSkillList: (payload: unknown) => Promise<RpcResponse<{ skills: SkillEntry[] }>> = () => Promise.resolve(ok({ skills: [] }))
 
   readonly commands: IApiClient['commands'] = {

packages/client/runtime/tests/fake-api.ts

@@ -127,7 +127,8 @@ export class FakeApiClient implements IApiClient {
   // wire shapes so cases can program requires-bearing catalogs and dual-address
   // skill lists without casts.
   onCommandList: (payload: unknown) => Promise<RpcResponse<{ commands: CommandDescriptor[] }>> = () => Promise.resolve(ok({ commands: [] }))
-  onCommandExecute: (payload: unknown) => Promise<RpcResponse<{ matched: boolean; result?: CommandExecuteResult }>> = () => Promise.resolve(ok({ matched: false }))
+  onCommandExecute: (payload: unknown) => Promise<RpcResponse<{ matched: boolean; result?: CommandExecuteResult }>> =
+    () => Promise.resolve(ok({ matched: false }))
   onSkillList: (payload: unknown) => Promise<RpcResponse<{ skills: SkillEntry[] }>> = () => Promise.resolve(ok({ skills: [] }))
 
   readonly commands: IApiClient['commands'] = {

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

@@ -10,7 +10,7 @@
  * inline error) without forking the state.
  */
 import type { ModelTarget, SessionModels } from '@deepseek-ai/dsh-client-connection/client'
-import type { ClientContext, SessionId } from '@deepseek-ai/dsh-client-runtime/client'
+import type { ClientContext } from '@deepseek-ai/dsh-client-runtime/client'
 import type { CommandServiceContract, SelectOption } from '@deepseek-ai/dsh-client-ui-command/client'
 // Type-only: pulls the ui-conversation SlotMap merge (the input.model seat).
 import type {} from '@deepseek-ai/dsh-client-ui-conversation/client'
@@ -109,7 +109,7 @@ export function apply(ctx: ClientContext): void {
     scope.effect(() => scope.slots.register({
       name: 'conversation.input.model',
       inject: (sessionId): ModelSelectInjected => {
-        const directory = models.directoryFor(sessionId as SessionId)
+        const directory = models.directoryFor(sessionId)
         return {
           directory: directory.store,
           load: () => { directory.load().catch(() => { /* surfaced on the store */ }) },