v0.3.1: ship compiled dist/ so npm git installs work without TS stripping

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>

.gitignore

@@ -1,3 +1,4 @@
 node_modules/
+dist/
 *.tgz
 .DS_Store

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@uschuster/webapp-scaffold",
-  "version": "0.3.0",
+  "version": "0.3.1",
   "description": "Shared build scripts + Vite config factories for webapp-template-derived projects.",
   "type": "module",
   "bin": {
@@ -8,15 +8,37 @@
     "webapp-scaffold-postprocess-openapi": "bin/postprocess-openapi.py",
     "webapp-scaffold-inject-hashes":       "bin/inject-hashed-filenames.py"
   },
-  "main": "src/vite-config.ts",
+  "main":   "dist/vite-config.js",
+  "module": "dist/vite-config.js",
+  "types":  "dist/vite-config.d.ts",
   "exports": {
-    ".":                "./src/vite-config.ts",
+    ".": {
-    "./core-fetch":     "./src/core-fetch.ts",
+        "types":  "./dist/vite-config.d.ts",
-    "./i18n":           "./src/i18n.ts",
+        "import": "./dist/vite-config.js"
-    "./i18n-react":     "./src/i18n-react.ts",
+    },
+    "./core-fetch": {
+        "types":  "./dist/core-fetch.d.ts",
+        "import": "./dist/core-fetch.js"
+    },
+    "./i18n": {
+        "types":  "./dist/i18n.d.ts",
+        "import": "./dist/i18n.js"
+    },
+    "./i18n-react": {
+        "types":  "./dist/i18n-react.d.ts",
+        "import": "./dist/i18n-react.js"
+    },
     "./orval-template": "./templates/orval.config.template.ts"
   },
-  "files": ["bin/", "src/", "templates/", "README.md", "LICENSE"],
+  "files": ["bin/", "dist/", "src/", "templates/", "README.md", "LICENSE"],
+  "scripts": {
+    "prepare": "tsc || true"
+  },
+  "devDependencies": {
+    "typescript":   "^5.0.0",
+    "@types/node":  "^22.0.0",
+    "@types/react": "^19.0.0"
+  },
   "peerDependencies": {
     "vite":                 "^6.0.0",
     "@vitejs/plugin-react": "^4.0.0",

tsconfig.json

@@ -0,0 +1,16 @@
+{
+  "compilerOptions": {
+    "target":           "ES2020",
+    "module":           "ESNext",
+    "moduleResolution": "bundler",
+    "strict":           true,
+    "skipLibCheck":     true,
+    "declaration":      true,
+    "outDir":           "dist",
+    "rootDir":          "src",
+    "lib":              ["ES2020", "DOM"],
+    "jsx":              "react-jsx",
+    "esModuleInterop":  true
+  },
+  "include": ["src/**/*"]
+}