feat: add Windows ARM64 support with x64-baseline CLI workaround (#2537)

* feat: add Windows ARM64 support with x64-baseline CLI workaround

Windows ARM64 native opencode.exe fails with a Bun FFI/TinyCC dlopen
error (anomalyco/opencode#19130). As a temporary workaround:

- Bundle x64-baseline OpenCode CLI on ARM64 instead of native ARM64
  (prepare-opencode-cli.mjs, env-runtime.js)
- Disable OpenCode self-upgrade on ARM64 in server, VS Code, and UI
  (upgrade-capability.js, opencode-upgrade-runtime.ts, useUIStore.ts,
  OpenCodeCliSettings.tsx, search.ts, SettingsView.tsx, platform.ts)
- Add ARM64 Windows cross-compile builds to release and smoke workflows
  (release.yml, release-desktop-smoke.yml)
- Refactor Windows latest.yml to use combine-electron-manifests pattern
  matching macOS, since two arches now produce per-arch manifests

The CI ARM64 build itself is permanent; only the x64-baseline CLI
bundling and upgrade disablement are temporary and should be reverted
when the upstream issue is resolved.

* fix(desktop): select Windows updater by architecture

---------

Co-authored-by: Bohdan Triapitsyn <artmore@protonmail.com>

packages/ui/src/components/sections/openchamber/OpenCodeCliSettings.tsx

@@ -16,6 +16,7 @@ import { reloadOpenCodeConfiguration } from '@/stores/useAgentsStore';
 import { useUIStore } from '@/stores/useUIStore';
 import { useI18n } from '@/lib/i18n';
 import { runtimeFetch } from '@/lib/runtime-fetch';
+import { isWindowsArm64 } from '@/lib/platform';
 
 export const OpenCodeCliSettings: React.FC = () => {
   const { t } = useI18n();
@@ -151,13 +152,15 @@ export const OpenCodeCliSettings: React.FC = () => {
         </SettingsFieldRow>
 
         <SettingsInset className={SETTINGS_OPTION_STACK_CLASS}>
-          <SettingsCheckboxRow
-            settingsItem="sessions.opencode-update-notifications"
-            checked={showOpenCodeUpdateNotifications}
-            onChange={handleShowUpdateNotificationsChange}
-            label={t('settings.openchamber.opencodeCli.field.showUpdateNotifications')}
-            ariaLabel={t('settings.openchamber.opencodeCli.field.showUpdateNotificationsAria')}
-          />
+          {!isWindowsArm64() && (
+            <SettingsCheckboxRow
+              settingsItem="sessions.opencode-update-notifications"
+              checked={showOpenCodeUpdateNotifications}
+              onChange={handleShowUpdateNotificationsChange}
+              label={t('settings.openchamber.opencodeCli.field.showUpdateNotifications')}
+              ariaLabel={t('settings.openchamber.opencodeCli.field.showUpdateNotificationsAria')}
+            />
+          )}
 
           <SettingsCheckboxRow
             settingsItem="sessions.agent-control-tool"

packages/ui/src/components/views/SettingsView.tsx

@@ -43,6 +43,7 @@ import {
 } from '@/components/sections/shared/SettingsSection';
 import { useDeviceInfo } from '@/lib/device';
 import { isDesktopLocalOriginActive, isDesktopShell, isVSCodeRuntime, isWebRuntime } from '@/lib/desktop';
+import { isWindowsArm64 as isWindowsArm64Platform } from '@/lib/platform';
 import { useI18n } from '@/lib/i18n';
 import { Icon } from "@/components/icon/Icon";
 import type { IconName } from "@/components/icon/icons";
@@ -278,6 +279,7 @@ export const SettingsView: React.FC<SettingsViewProps> = ({ onClose, forceMobile
     return isDesktopShell() && typeof window !== 'undefined'
       && (window as unknown as { __OPENCHAMBER_PLATFORM__?: string }).__OPENCHAMBER_PLATFORM__ === 'linux';
   }, []);
+  const isWindowsArm64 = React.useMemo(() => isWindowsArm64Platform(), []);
 
   // keep platform check available for future window chrome tweaks
 
@@ -421,12 +423,12 @@ export const SettingsView: React.FC<SettingsViewProps> = ({ onClose, forceMobile
   const settingsSearchResults = React.useMemo(() => {
     return buildSettingsSearchResults({
       query: settingsSearchQuery,
-      runtimeCtx: { ...runtimeCtx, isDesktopLocalOrigin, isMac, isWindows, isLinux },
+      runtimeCtx: { ...runtimeCtx, isDesktopLocalOrigin, isMac, isWindows, isLinux, isWindowsArm64 },
       visiblePageSlugs,
       t,
       getPageTitle,
     });
-  }, [getPageTitle, isDesktopLocalOrigin, isMac, isWindows, isLinux, runtimeCtx, settingsSearchQuery, t, visiblePageSlugs]);
+  }, [getPageTitle, isWindowsArm64, isDesktopLocalOrigin, isMac, isWindows, isLinux, runtimeCtx, settingsSearchQuery, t, visiblePageSlugs]);
 
   const prepareSettingsSearchTarget = React.useCallback((result: SettingsSearchResult): string => {
     if (result.id.startsWith('agents.')) {