feat: add linter

.vscode/extensions.json

@@ -0,0 +1,5 @@
+{
+  "recommendations": [
+    "dbaeumer.vscode-eslint"
+  ]
+}

.vscode/settings.json

@@ -1,6 +1,10 @@
 {
+  // Disable Prettier, use ESLint for formatting instead
   "prettier.enable": false,
+  // Disable default formatOnSave, use ESLint fixOnSave
   "editor.formatOnSave": false,
+
+  // Markdown settings
   "[markdown]": {
     "editor.wordWrap": "on",
     "editor.formatOnSave": true,
@@ -13,12 +17,61 @@
       "strings": "off"
     }
   },
+
+  // YAML settings: auto-fix ESLint issues on save
   "[yaml]": {
-    "editor.formatOnSave": true
+    "editor.formatOnSave": false,
+    "editor.codeActionsOnSave": {
+      "source.fixAll.eslint": "explicit"
+    }
   },
+
+  // Docker Compose settings
   "[dockercompose]": {
-    "editor.formatOnSave": true
+    "editor.formatOnSave": false,
+    "editor.codeActionsOnSave": {
+      "source.fixAll.eslint": "explicit"
+    }
   },
+
+  // File EOL configuration
   "files.eol": "\n",
-  "cSpell.enabled": false
+
+  // Disable spell checking
+  "cSpell.enabled": false,
+
+  // ESLint settings: auto-fix on save
+  "editor.codeActionsOnSave": {
+    "source.fixAll.eslint": "explicit",
+    "source.organizeImports": "never"
+  },
+
+  // Silent stylistic rules in IDE but still auto-fix them
+  "eslint.rules.customizations": [
+    { "rule": "style/*", "severity": "off", "fixable": true },
+    { "rule": "format/*", "severity": "off", "fixable": true },
+    { "rule": "*-indent", "severity": "off", "fixable": true },
+    { "rule": "*-spacing", "severity": "off", "fixable": true },
+    { "rule": "*-spaces", "severity": "off", "fixable": true },
+    { "rule": "*-order", "severity": "off", "fixable": true },
+    { "rule": "*-dangle", "severity": "off", "fixable": true },
+    { "rule": "*-newline", "severity": "off", "fixable": true },
+    { "rule": "*quotes", "severity": "off", "fixable": true },
+    { "rule": "*semi", "severity": "off", "fixable": true }
+  ],
+
+  // Enable ESLint for supported languages
+  "eslint.validate": [
+    "javascript",
+    "javascriptreact",
+    "typescript",
+    "typescriptreact",
+    "vue",
+    "html",
+    "markdown",
+    "json",
+    "jsonc",
+    "yaml",
+    "toml"
+  ]
 }