Consumers installing via 'git+http://.../webapp-scaffold.git#<tag>' hit
Node's ERR_UNSUPPORTED_NODE_MODULES_TYPE_STRIPPING because .ts files
under node_modules can't be loaded by vite.config.ts loaders / node's
default loader.
Add tsconfig.json + 'prepare: tsc' (runs on git install). Emit .js + .d.ts
into dist/. package.json exports point at dist/; .ts remains in src/ for
direct-source consumers (e.g. monorepo setups). 'dist/' is gitignored —
it's a build artifact, populated at install time.
Version bump to 0.3.1 since this is a patch on the already-released
0.3.0 ABI (no API changes, just packaging).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
