fix: narrow DEPLOY_STATUS_DOT type to match StatusDotVariant

Fixes pre-existing TS2322 where Record<string, string> was not
assignable to the StatusDotVariant union type.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/pages/AppsTab/AppsTab.tsx

@@ -51,7 +51,7 @@ const STATUS_COLORS: Record<string, 'success' | 'warning' | 'error' | 'auto' | '
   DEGRADED: 'warning', STOPPING: 'auto',
 };
 
-const DEPLOY_STATUS_DOT: Record<string, string> = {
+const DEPLOY_STATUS_DOT: Record<string, 'live' | 'stale' | 'dead' | 'success' | 'warning' | 'error' | 'running'> = {
   RUNNING: 'live', STARTING: 'running', DEGRADED: 'stale',
   STOPPING: 'stale', STOPPED: 'dead', FAILED: 'error',
 };