chore: migrate from eslint+prettier to oxlint+oxfmt

- Replace ESLint + Prettier with Rust-based OxLint + Oxfmt tools
- Remove 130 npm packages (ESLint plugins, TypeScript plugins, Prettier, globals)
- Add oxlint (1.42.0) and oxfmt (0.27.0) as dev dependencies
- Create .oxlintrc.json with React, TypeScript, and Vitest plugins
- Create .oxfmtrc.json (migrated from Prettier config)
- Update package.json scripts: lint, format, format:check
- Update .vscode/settings.json for Oxc VSCode extension
- Disable react-in-jsx-scope rule (using new JSX transform)
- Fix QueryPrefetchTags jsx-key warning by adding key prop
- Refactor useQueryInstance test to remove ErrorBoundary
  - Use try-catch in component instead of ErrorBoundary
  - Remove .concurrent from test file (avoid overlapping act() calls)
  - Eliminates stderr output during tests
- Update AGENTS.md documentation for new tooling

Author: ConsoleTVs

.oxfmtrc.json

@@ -0,0 +1,14 @@
+{
+  "$schema": "./node_modules/oxfmt/configuration_schema.json",
+  "arrowParens": "always",
+  "bracketSameLine": true,
+  "bracketSpacing": true,
+  "printWidth": 100,
+  "useTabs": false,
+  "tabWidth": 2,
+  "trailingComma": "es5",
+  "singleQuote": true,
+  "semi": false,
+  "quoteProps": "consistent",
+  "ignorePatterns": []
+}

.oxlintrc.json

@@ -0,0 +1,28 @@
+{
+  "$schema": "./node_modules/oxlint/configuration_schema.json",
+  "plugins": ["react", "typescript", "vitest"],
+  "categories": {
+    "correctness": "error",
+    "suspicious": "warn"
+  },
+  "rules": {
+    "react-in-jsx-scope": "off"
+  },
+  "settings": {
+    "react": {
+      "formComponents": [],
+      "linkComponents": [],
+      "version": "19.2",
+      "componentWrapperFunctions": []
+    },
+    "vitest": {
+      "typecheck": false
+    }
+  },
+  "env": {
+    "builtin": true,
+    "browser": true
+  },
+  "globals": {},
+  "ignorePatterns": ["dist", "coverage", "node_modules"]
+}

AGENTS.md

@@ -56,13 +56,14 @@ src/
 
 ## Code Style
 
-### Formatting (Prettier)
+### Formatting (Oxfmt)
 
 - Single quotes, no semicolons
 - 2-space indentation (no tabs)
 - 100 character line width
 - Trailing commas: `es5`
 - Always use parentheses in arrow functions: `(x) => x`
+- Configuration: `.oxfmtrc.json`
 
 ### Imports
 
@@ -159,12 +160,14 @@ describe.concurrent('feature', function () {
 })
 ```
 
-## ESLint
+## OxLint
 
-- TypeScript strict type checking enabled for `src/**`
-- React hooks rules for `src/react/**`
-- Solid.js rules for `src/solid/**`
-- Rule `@typescript-eslint/no-unnecessary-type-parameters` is disabled
+- Configuration: `.oxlintrc.json`
+- React plugin enabled with hooks rules
+- Vitest plugin enabled for test files
+- TypeScript plugin enabled
+- `react-in-jsx-scope` rule disabled (using new JSX transform)
+- Use `// oxlint-disable-next-line` to disable rules inline
 
 ## Environment