fix(skills): pass -y to skill install command so it can't hang on agent prompt

Orca spawns the skill install command (`npx skills add ... --global`) in a
non-driven ephemeral setup terminal. The skills CLI runs an interactive
"Which agents do you want to install to?" prompt (@clack/prompts) whenever
stdin is a TTY, which the PTY is. With no `-y` flag the prompt blocks
forever, Orca kills the terminal after ~50s (exit 1), and the install
silently fails — Settings shows "install complete" but Re-check keeps
reporting "Not installed" and agent coverage stays "missing". Repros
reliably on a WSL2 work area with agents installed inside the distro (#9567).

Verified against skills CLI dist: with `-y`/`options.yes` the add command
takes the non-interactive path `targetAgents = ensureUniversalAgents(installedAgents)`
(all detected agents) instead of prompting, matching the CLI's own tip
("use the --yes (-y) and --global (-g) flags to install without prompts").

Scope kept to the install command; update commands run in user-facing
terminals where the upstream-deletion prompt is an intentional choice.

src/renderer/src/components/onboarding/onboarding-feature-setup.test.ts

@@ -119,7 +119,7 @@ describe('onboarding feature setup runner', () => {
 
     expect(text).toBe(ALL_SKILL_INSTALL_COMMAND)
     expect(text).toBe(
-      'npx skills add https://github.com/stablyai/orca --skill orca-cli computer-use orchestration orca-linear --global'
+      'npx skills add https://github.com/stablyai/orca --skill orca-cli computer-use orchestration orca-linear --global -y'
     )
   })
 

src/renderer/src/components/settings/AgentSkillSetupPanel.test.tsx

@@ -7,7 +7,8 @@ import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 import { AgentSkillSetupPanel } from './AgentSkillSetupPanel'
 import { TooltipProvider } from '../ui/tooltip'
 
-const INSTALL_COMMAND = 'npx skills add https://github.com/stablyai/orca --skill orca-cli --global'
+const INSTALL_COMMAND =
+  'npx skills add https://github.com/stablyai/orca --skill orca-cli --global -y'
 const UPDATE_COMMAND = 'npx skills update orca-cli --global'
 
 const mocks = vi.hoisted(() => ({

src/renderer/src/components/settings/OrchestrationPane.test.tsx

@@ -8,7 +8,7 @@ import { getOrchestrationUsageExamples } from '@/lib/orchestration-usage-example
 import { OrchestrationPane } from './OrchestrationPane'
 
 const INSTALL_COMMAND =
-  'npx skills add https://github.com/stablyai/orca --skill orchestration --global'
+  'npx skills add https://github.com/stablyai/orca --skill orchestration --global -y'
 const UPDATE_COMMAND = INSTALL_COMMAND
 
 const mocks = vi.hoisted(() => ({

src/renderer/src/components/settings/linear-agent-skill-install-cta.test.tsx

@@ -115,7 +115,7 @@ describe('LinearAgentSkillInstallCta', () => {
     expect(rendered.textContent).toContain('Not installed')
     expect(rendered.textContent).toContain('Let your agents read and edit Linear tasks.')
     expect(rendered.textContent).toContain(
-      'npx skills add https://github.com/stablyai/orca --skill orca-linear --global'
+      'npx skills add https://github.com/stablyai/orca --skill orca-linear --global -y'
     )
   })
 
@@ -129,7 +129,7 @@ describe('LinearAgentSkillInstallCta', () => {
     })
 
     expect(mocks.clipboardWrite).toHaveBeenCalledWith(
-      'npx skills add https://github.com/stablyai/orca --skill orca-linear --global'
+      'npx skills add https://github.com/stablyai/orca --skill orca-linear --global -y'
     )
     expect(mocks.toastSuccess).toHaveBeenCalled()
   })

src/shared/agent-feature-install-commands.ts

@@ -12,7 +12,10 @@ export function buildAgentFeatureSkillInstallCommand(skillNames: readonly string
   if (skillNames.length === 0) {
     throw new Error('At least one skill name is required.')
   }
-  return `npx skills add ${ORCA_SKILLS_REPOSITORY_URL} --skill ${skillNames.join(' ')} --global`
+  // Why: Orca spawns this in a non-driven PTY (ephemeral setup terminal). Without -y the
+  // skills CLI's interactive "Which agents?" prompt blocks until Orca kills it (~50s, exit 1),
+  // so the install silently fails (#9567). -y installs to all detected agents non-interactively.
+  return `npx skills add ${ORCA_SKILLS_REPOSITORY_URL} --skill ${skillNames.join(' ')} --global -y`
 }
 
 export function buildAgentFeatureSkillUpdateCommand(skillName: string): string {