Upgrade kit/ to Svelte 5, SvelteKit 2, Vite 7, Tailwind 4, ESLint 10

.github/workflows/lint-svelte-kit.yml

@@ -19,9 +19,11 @@ jobs:
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e  # v6.4.0
         with:
           node-version: "20"
+          cache: npm
+          cache-dependency-path: kit/package-lock.json
 
       - name: Install dependencies
-        run: npm install ci
+        run: npm ci
         working-directory: kit
 
       - name: Checking lint/format errors

kit/.npmrc

@@ -1,2 +1 @@
 engine-strict=true
-resolution-mode=highest

kit/eslint.config.js

@@ -0,0 +1,57 @@
+import js from "@eslint/js";
+import prettier from "eslint-config-prettier";
+import svelte from "eslint-plugin-svelte";
+import globals from "globals";
+import ts from "typescript-eslint";
+
+export default ts.config(
+	{
+		ignores: ["**/*.cjs", "build/", ".svelte-kit/", "package/", "static/"],
+	},
+	js.configs.recommended,
+	...ts.configs.recommended,
+	...svelte.configs.recommended,
+	prettier,
+	...svelte.configs.prettier,
+	{
+		languageOptions: {
+			globals: {
+				...globals.browser,
+				...globals.node,
+				// Injected at build time via Vite `define` (see vite.config.ts)
+				__DOCS_LIBRARY__: "readonly",
+				__DOCS_VERSION__: "readonly",
+				__DOCS_LANGUAGE__: "readonly",
+			},
+		},
+	},
+	{
+		files: ["**/*.svelte"],
+		languageOptions: {
+			parserOptions: {
+				parser: ts.parser,
+			},
+		},
+	},
+	{
+		rules: {
+			"no-shadow": ["error"],
+			"@typescript-eslint/no-explicit-any": "error",
+			"@typescript-eslint/no-non-null-assertion": "error",
+			"@typescript-eslint/no-unused-vars": [
+				// prevent variables with a _ prefix from being marked as unused
+				"error",
+				{
+					argsIgnorePattern: "^_",
+					varsIgnorePattern: "^_",
+				},
+			],
+			// The whole point of doc-builder is rendering generated (trusted) HTML
+			"svelte/no-at-html-tags": "off",
+			// Doc links are plain prerendered hrefs by design
+			"svelte/no-navigation-without-resolve": "off",
+			// Pre-existing unkeyed each blocks; keying them changes update semantics
+			"svelte/require-each-key": "off",
+		},
+	}
+);