feat: remove legacy OpenCode runtime

Cut product flows over to Coding/Pi and retain only the migration-owned v1 boundary. Promote supported native optional packages because electron-builder omitted pnpm transitive optional closure from the packaged ASAR.

src/pages/Setup/index.tsx

@@ -16,8 +16,8 @@ import {
 import { TitleBar } from '@/components/layout/TitleBar';
 import { Button } from '@/components/ui/button';
 import { Progress } from '@/components/ui/progress';
+import { hostApiFetch } from '@/lib/host-api';
 import { cn } from '@/lib/utils';
-import { useOpencodeStore } from '@/stores/opencode';
 import { useSettingsStore } from '@/stores/settings';
 import { useTranslation } from 'react-i18next';
 import type { TFunction } from 'i18next';
@@ -71,7 +71,7 @@ interface DefaultSkill {
 }
 
 const getDefaultSkills = (t: TFunction): DefaultSkill[] => [
-  { id: 'opencode', name: t('defaultSkills.opencode.name'), description: t('defaultSkills.opencode.description') },
+  { id: 'coding-runtime', name: t('defaultSkills.codingRuntime.name'), description: t('defaultSkills.codingRuntime.description') },
   { id: 'python-env', name: t('defaultSkills.python-env.name'), description: t('defaultSkills.python-env.description') },
   { id: 'code-assist', name: t('defaultSkills.code-assist.name'), description: t('defaultSkills.code-assist.description') },
   { id: 'file-tools', name: t('defaultSkills.file-tools.name'), description: t('defaultSkills.file-tools.description') },
@@ -107,10 +107,6 @@ function useRotatingSetupMessage(messages: string[], active = true) {
   return messages[index % Math.max(messages.length, 1)] ?? messages[0] ?? '';
 }
 
-function isRuntimeReady(state: string) {
-  return state === 'running' || state === 'stopped';
-}
-
 export function Setup() {
   const { t } = useTranslation('setup');
   const navigate = useNavigate();
@@ -339,8 +335,6 @@ interface RuntimeContentProps {
 
 function RuntimeContent({ onStatusChange }: RuntimeContentProps) {
   const { t } = useTranslation('setup');
-  const opencodeStatus = useOpencodeStore((state) => state.status);
-  const refreshOpencodeStatus = useOpencodeStore((state) => state.refreshStatus);
   const stuckTimeoutRef = useRef<number | null>(null);
 
   const [runtimeStatus, setRuntimeStatus] = useState<RuntimeProgressStatus>('checking');
@@ -394,21 +388,16 @@ function RuntimeContent({ onStatusChange }: RuntimeContentProps) {
 
     try {
       setRuntimeProgress(48);
-      await refreshOpencodeStatus();
-      const current = useOpencodeStore.getState().status;
-      if (isRuntimeReady(current.state)) {
+      const current = await hostApiFetch<{ runtime?: string }>('/api/app/runtime-info');
+      if (current.runtime === 'pi') {
         markSuccess();
         return;
       }
-      if (current.state === 'error') {
-        markFailure();
-        return;
-      }
-      setRuntimeProgress(72);
+      markFailure();
     } catch {
       markFailure();
     }
-  }, [markFailure, markSuccess, onStatusChange, refreshOpencodeStatus, startStuckTimeout]);
+  }, [markFailure, markSuccess, onStatusChange, startStuckTimeout]);
 
   useEffect(() => {
     const timer = window.setTimeout(() => {
@@ -420,18 +409,6 @@ function RuntimeContent({ onStatusChange }: RuntimeContentProps) {
     };
   }, [clearStuckTimeout, runChecks]);
 
-  useEffect(() => {
-    let timer: number | null = null;
-    if (opencodeStatus.state === 'running') {
-      timer = window.setTimeout(markSuccess, 0);
-    } else if (opencodeStatus.state === 'error') {
-      timer = window.setTimeout(markFailure, 0);
-    }
-    return () => {
-      if (timer !== null) window.clearTimeout(timer);
-    };
-  }, [markFailure, markSuccess, opencodeStatus.state]);
-
   const statusMessage = runtimeStatus === 'success'
     ? t('runtime.progress.done')
     : runtimeStatus === 'error'
@@ -585,7 +562,6 @@ interface CompleteContentProps {
 
 function CompleteContent({ installedSkills }: CompleteContentProps) {
   const { t } = useTranslation(['setup', 'settings']);
-  const opencodeStatus = useOpencodeStore((state) => state.status);
 
   const installedSkillNames = getDefaultSkills(t)
     .filter((s: DefaultSkill) => installedSkills.includes(s.id))
@@ -609,9 +585,7 @@ function CompleteContent({ installedSkills }: CompleteContentProps) {
         </div>
                 <div className="flex items-center justify-between p-3 rounded-lg bg-muted/50">
           <span>{t('complete.runtime')}</span>
-          <span className={opencodeStatus.state === 'running' ? 'text-green-400' : 'text-yellow-400'}>
-            {opencodeStatus.state === 'running' ? t('complete.running') : opencodeStatus.state}
-          </span>
+          <span className="text-green-400">{t('complete.running')}</span>
         </div>
       </div>