Function mergePluginErrors

src/utils/plugins/refresh.ts:207–217

* Merge fresh plugin-load errors with existing errors, preserving LSP and * plugin-component errors that were recorded by other systems and * deduplicating. Same logic as refreshPlugins()/updatePluginState(), extracted * so refresh.ts doesn't leave those errors stranded.

(
  existing: PluginError[],
  fresh: PluginError[],
)

 * so refresh.ts doesn't leave those errors stranded.
 */
function mergePluginErrors(
  existing: PluginError[],
  fresh: PluginError[],
): PluginError[] {
  const preserved = existing.filter(
    e => e.source === 'lsp-manager' || e.source.startsWith('plugin:'),
  )
  const freshKeys = new Set(fresh.map(errorKey))
  const deduped = preserved.filter(e => !freshKeys.has(errorKey(e)))
  return [...deduped, ...fresh]
}

function errorKey(e: PluginError): string {
  return e.type === 'generic-error'