build: migrate to bun package manager and enforce with preinstall check

.github/dependabot.yml

@@ -37,7 +37,7 @@ updates:
       - "dependencies"
       - "rust"
 
-  # Frontend (web/)
+  # Frontend (web/) - Uses bun, but npm ecosystem for Dependabot compatibility
   - package-ecosystem: "npm"
     directory: "/web"
     schedule:

.gitignore

@@ -10,6 +10,14 @@ dist/
 emsdk/
 node_modules/
 
+# Package manager lockfiles (bun only)
+pnpm-lock.yaml
+yarn.lock
+package-lock.json
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
 # Emscripten build outputs (generated by cargo build)
 web/public/pacman.data
 web/public/pacman.js

bun.lock

@@ -1,5 +1,6 @@
 {
   "lockfileVersion": 1,
+  "configVersion": 0,
   "workspaces": {
     "": {
       "name": "pacman",

package.json

@@ -1,6 +1,13 @@
 {
   "name": "pacman",
   "type": "module",
+  "packageManager": "bun@^1.3.5",
+  "engines": {
+    "bun": ">=1.3.5"
+  },
+  "scripts": {
+    "preinstall": "npx only-allow bun"
+  },
   "devDependencies": {
     "ts-pattern": "^5.5.0",
     "@logtape/logtape": "^0.8.0"

web/package.json

@@ -1,4 +1,11 @@
 {
+  "name": "pacman-web",
+  "description": "A web frontend for the Pac-Man game, including leaderboards and OAuth.",
+  "type": "module",
+  "packageManager": "bun@^1.3.5",
+  "engines": {
+    "bun": ">=1.3.5"
+  },
   "scripts": {
     "preinstall": "npx only-allow bun",
     "dev": "vike dev",
@@ -6,8 +13,6 @@
     "preview": "vike preview",
     "lint": "eslint ."
   },
-  "name": "pacman-web",
-  "description": "A web frontend for the Pac-Man game, including leaderboards and OAuth.",
   "dependencies": {
     "@fontsource/outfit": "^5.2.8",
     "@fontsource/pixelify-sans": "^5.2.7",
@@ -39,6 +44,5 @@
     "typescript": "^5.9.2",
     "typescript-eslint": "^8.42.0",
     "vite": "^7.1.4"
-  },
-  "type": "module"
+  }
 }