refactor: remove legacy Tauri desktop support

Electron updater now uses Electron release metadata only
Removed legacy Tauri package and migration workflow
Replaced Tauri shim usage with the desktop bridge

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

@@ -4,7 +4,7 @@ import { Checkbox } from '@/components/ui/checkbox';
 import { Input } from '@/components/ui/input';
 import { Tooltip, TooltipContent, TooltipTrigger } from '@/components/ui/tooltip';
 import { Icon } from "@/components/icon/Icon";
-import { isDesktopShell, isTauriShell } from '@/lib/desktop';
+import { isDesktopShell, requestFileAccess } from '@/lib/desktop';
 import { updateDesktopSettings } from '@/lib/persistence';
 import { reloadOpenCodeConfiguration } from '@/stores/useAgentsStore';
 import { useUIStore } from '@/stores/useUIStore';
@@ -54,28 +54,19 @@ export const OpenCodeCliSettings: React.FC = () => {
       return;
     }
 
-    if (!isDesktopShell() || !isTauriShell()) {
-      return;
-    }
-
-    const tauri = (window as unknown as { __TAURI__?: { dialog?: { open?: (opts: Record<string, unknown>) => Promise<unknown> } } }).__TAURI__;
-    if (!tauri?.dialog?.open) {
+    if (!isDesktopShell()) {
       return;
     }
 
     try {
-      const selected = await tauri.dialog.open({
-        title: t('settings.openchamber.opencodeCli.dialog.selectBinaryTitle'),
-        multiple: false,
-        directory: false,
-      });
-      if (typeof selected === 'string' && selected.trim().length > 0) {
-        setValue(selected.trim());
+      const selected = await requestFileAccess();
+      if (selected.success && selected.path && selected.path.trim().length > 0) {
+        setValue(selected.path.trim());
       }
     } catch {
       // ignore
     }
-  }, [t]);
+  }, []);
 
   const handleSaveAndReload = React.useCallback(async () => {
     setIsSaving(true);
@@ -130,7 +121,7 @@ export const OpenCodeCliSettings: React.FC = () => {
               variant="outline"
               size="xs"
               onClick={handleBrowse}
-              disabled={isLoading || isSaving || !isDesktopShell() || !isTauriShell()}
+              disabled={isLoading || isSaving || !isDesktopShell()}
               className="h-7 w-7 p-0"
               aria-label={t('settings.openchamber.opencodeCli.actions.browseAria')}
               title={t('settings.openchamber.opencodeCli.actions.browse')}