feat: add Biome linting with unused variables as errors

.devcontainer/devcontainer.json

@@ -1,7 +1,7 @@
 {
   "name": "Atomify Dev Container with Emscripten",
   "image": "mcr.microsoft.com/devcontainers/base:ubuntu",
-  
+
   "features": {
     "ghcr.io/devcontainers/features/node:1": {
       "version": "lts"
@@ -18,10 +18,7 @@
 
   "customizations": {
     "vscode": {
-      "extensions": [
-        "ms-vscode.cpptools",
-        "ms-python.python"
-      ],
+      "extensions": ["ms-vscode.cpptools", "ms-python.python"],
       "settings": {
         "terminal.integrated.defaultProfile.linux": "bash"
       }
@@ -30,4 +27,3 @@
 
   "remoteUser": "vscode"
 }
-

.github/workflows/deploy.yaml

@@ -32,8 +32,8 @@ jobs:
         run: npm run typecheck
       - name: Run Tests
         run: npm run test:run
-      - name: Run Prettier
-        run: npx prettier .
+      - name: Run Lint
+        run: npm run lint
       - name: Build app
         run: npm run predeploy
       - name: Upload artifact

biome.json

@@ -0,0 +1,57 @@
+{
+  "$schema": "https://biomejs.dev/schemas/2.3.8/schema.json",
+  "vcs": {
+    "enabled": true,
+    "clientKind": "git",
+    "useIgnoreFile": true
+  },
+  "files": {
+    "ignoreUnknown": true,
+    "includes": [
+      "**",
+      "!**/node_modules",
+      "!**/dist",
+      "!**/build",
+      "!**/cpp",
+      "!**/public/jupyter",
+      "!**/public/lammps.mjs",
+      "!**/public/lammps.wasm",
+      "!**/src/wasm"
+    ]
+  },
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space",
+    "indentWidth": 2,
+    "lineWidth": 100
+  },
+  "assist": { "actions": { "source": { "organizeImports": "on" } } },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": true,
+      "correctness": {
+        "noUnusedVariables": "error",
+        "useJsxKeyInIterable": "warn"
+      },
+      "suspicious": {
+        "noExplicitAny": "warn",
+        "noArrayIndexKey": "warn",
+        "useIterableCallbackReturn": "warn",
+        "noAssignInExpressions": "warn"
+      },
+      "complexity": {
+        "noBannedTypes": "warn",
+        "noImportantStyles": "off"
+      }
+    }
+  },
+  "javascript": {
+    "formatter": {
+      "quoteStyle": "double",
+      "jsxQuoteStyle": "double",
+      "trailingCommas": "es5",
+      "semicolons": "always"
+    }
+  }
+}

jupyter-lite.json

@@ -5,4 +5,4 @@
     "settingsStorageName": "JupyterLite Storage",
     "workspacesStorageName": "JupyterLite Storage"
   }
-}
+}

package.json

@@ -48,6 +48,8 @@
     "test:run": "vitest run",
     "test:ui": "vitest --ui",
     "typecheck": "tsc --noEmit",
+    "lint": "biome check .",
+    "lint:fix": "biome check --write .",
     "predeploy": "npm run build",
     "deploy": "gh-pages -d dist"
   },
@@ -64,6 +66,7 @@
     ]
   },
   "devDependencies": {
+    "@biomejs/biome": "^2.3.8",
     "@jupyterlab/nbformat": "^4.5.0",
     "@testing-library/jest-dom": "^6.9.1",
     "@types/emscripten": "^1.41.5",