chore: migrate Regex Tools to LocalToolBox

README.md

@@ -8,9 +8,9 @@ Patterns, replacement templates, test text and project files stay in the
 browser. There is no account, backend, upload, remote execution, telemetry,
 runtime CDN, remote font, or cloud-save service.
 
-## Current release — 0.4.1
+## Current release — 0.4.2
 
-The v0.4.1 release contains twelve selectable, executable profiles:
+The v0.4.2 release contains twelve selectable, executable profiles:
 
 - **JavaScript (ECMAScript)** — the current browser's native `RegExp`, with
   ECMAScript 2025 syntax supplied by regexpp 4.12.2;
@@ -356,7 +356,7 @@ The normal build performs no network download. `vite.config.ts` uses
 
 ## Toolbox SDK and Portal
 
-The application uses Toolbox SDK 0.2.2 `AppShell`. Its canonical typed/static
+The application uses Toolbox SDK 0.2.3 `AppShell`. Its canonical typed/static
 manifest source is `src/toolbox/manifest.source.json`; generation fails if its
 version or source identity drifts.