refactor(shared): consolidate plugin entry migration and detection utilities

src/shared/plugin-entry-migrator.ts

@@ -1 +1,21 @@
-export { migrateLegacyPluginEntry } from "./migrate-legacy-plugin-entry"
+import { LEGACY_PLUGIN_NAME, PLUGIN_NAME } from "./plugin-identity"
+
+export function isLegacyEntry(entry: string): boolean {
+  return entry === LEGACY_PLUGIN_NAME || entry.startsWith(`${LEGACY_PLUGIN_NAME}@`)
+}
+
+export function isCanonicalEntry(entry: string): boolean {
+  return entry === PLUGIN_NAME || entry.startsWith(`${PLUGIN_NAME}@`)
+}
+
+export function toCanonicalEntry(entry: string): string {
+  if (entry === LEGACY_PLUGIN_NAME) {
+    return PLUGIN_NAME
+  }
+
+  if (entry.startsWith(`${LEGACY_PLUGIN_NAME}@`)) {
+    return `${PLUGIN_NAME}${entry.slice(LEGACY_PLUGIN_NAME.length)}`
+  }
+
+  return entry
+}