refactor: strip Phase/Plan/R-number references from source comments

packages/navigation/src/index.ts

@@ -3,7 +3,7 @@ export type { NavigationRouter } from "./integrations/api/router";
 export { HeaderNotFoundError } from "./entities/errors/header";
 export { InputParseError } from "./entities/errors/common";
 
-// Use case schemas + types (Plan 9 R18)
+// Use case schemas + types
 export {
   getHeaderInputSchema,
   getHeaderOutputSchema,
@@ -17,4 +17,7 @@ export type { IGetHeaderController } from "./interface-adapters/controllers/get-
 
 // <gen:events>
 // <gen:realtime-channels>
-export { navigationManifest, type NavigationManifest } from "./feature.manifest";
+export {
+  navigationManifest,
+  type NavigationManifest,
+} from "./feature.manifest";