Modernize toolchain (TypeScript, ESLint, webpack, ...) (#149)

Bump TypeScript (5.6->6.0), ESLint (9->10), eslint-plugin-react-hooks
(5->7), pnpm, @types/node, webpack-cli, webpack-dev-server and
copy-webpack-plugin to their latest majors.

Furthermore, modernize tsconfigbase.json for TypeScript 6.0: bump
`target`/`lib` to ES2024, switch `moduleResolution` from classic "node"
to "bundler", `module` switched to "esnext", and `downlevelIteration`
dropped, since TS 6.0 turns these into hard errors ahead of their
removal in TS 7.0.

This also required a few fixes:
- Fix new violations from ESLint 10's default preserve-caught-error and
no-useless-assignment rules.
- Patch eslint-plugin-react's flat configs with @eslint/compat's
fixupConfigRules to fix a runtime crash under ESLint 10, which removed
the context.getFilename() API the plugin still calls.
- Add ambient "*.css" module declarations, now required since TS 6.0
type-checks CSS side-effect imports more strictly.
- Fix rootDir/types gaps in standalone-app/tsconfig.json surfaced by the
same TS 6.0 strictness, needed for both tsc/ts-loader and ts-node's
config loading in webpack-cli.

Author: vogelsgesang

eslint.config.mjs

@@ -5,8 +5,7 @@ import reactPlugin from "eslint-plugin-react";
 import reactHooks from "eslint-plugin-react-hooks";
 import path from "node:path";
 import {fileURLToPath} from "node:url";
-import {includeIgnoreFile} from "@eslint/compat";
-import {fixupPluginRules} from "@eslint/compat";
+import {fixupConfigRules, fixupPluginRules, includeIgnoreFile} from "@eslint/compat";
 import globals from "globals";
 
 const __filename = fileURLToPath(import.meta.url);
@@ -16,12 +15,12 @@ const gitignorePath = path.resolve(__dirname, ".gitignore");
 export default [
     includeIgnoreFile(gitignorePath),
     eslint.configs.recommended,
-    reactPlugin.configs.flat["jsx-runtime"],
+    ...fixupConfigRules([reactPlugin.configs.flat["jsx-runtime"]]),
     eslintPluginPrettierRecommended,
     ...tseslint.configs.strict,
     ...tseslint.configs.stylistic,
     {
-        ...reactPlugin.configs.flat.recommended,
+        ...fixupConfigRules([reactPlugin.configs.flat.recommended])[0],
         settings: {
             ...reactPlugin.configs.flat.recommended.settings,
             react: {version: "detect"},

package.json

@@ -1,7 +1,7 @@
 {
     "private": true,
     "name": "query-graphs",
-    "packageManager": "pnpm@11.21.0",
+    "packageManager": "pnpm@11.22.0",
     "engines": {
         "node": ">=24"
     },
@@ -10,16 +10,16 @@
         "lint-test": "eslint ."
     },
     "devDependencies": {
-        "@eslint/compat": "^1.2.1",
-        "@eslint/js": "^9.13.0",
-        "eslint": "^9.13.0",
-        "eslint-config-prettier": "^9.1.0",
+        "@eslint/compat": "^2.1.0",
+        "@eslint/js": "^10.0.1",
+        "eslint": "^10.9.0",
+        "eslint-config-prettier": "^10.1.8",
         "eslint-plugin-prettier": "^5.2.1",
         "eslint-plugin-react": "^7.37.1",
-        "eslint-plugin-react-hooks": "^5.0.0",
+        "eslint-plugin-react-hooks": "^7.1.1",
         "globals": "^17.11.0",
         "prettier": "^3.3.3",
-        "typescript": "^5.6.3",
+        "typescript": "^6.0.3",
         "typescript-eslint": "^8.10.0"
     }
 }