Initial commit: Developer Tools MVP with visual editor

- Complete React app with 7 developer tools
- JSON Tool with visual structured editor
- Serialize Tool with visual structured editor
- URL, Base64, CSV/JSON, Beautifier, Diff tools
- Responsive navigation with dropdown menu
- Dark/light mode toggle
- Mobile-responsive design with sticky header
- All tools working with copy/paste functionality

node_modules/postcss-attribute-case-insensitive/CHANGELOG.md

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+# Changes to PostCSS Attribute Case Insensitive
+
+### 5.0.2 (June 8, 2022)
+
+- Fix incorrect selector AST updates
+
+### 5.0.1 (3 June, 2022)
+
+- Prevent exponential backtracking when checking for selectors with case insensitive value matching.
+
+### 5.0.0 (15 September, 2020)
+
+- Postcss 8.x support
+
+### 4.0.1 (10 January, 2019)
+
+### 2.0.0 (06 May, 2017)
+
+### 1.0.1 (19 August, 2016)
+
+### 1.0.0 (10 August, 2016)

node_modules/postcss-attribute-case-insensitive/LICENSE

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+The MIT License (MIT)
+
+Copyright 2020 Dmitry Semigradsky <semigradskyd@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/postcss-attribute-case-insensitive/README.md

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+# PostCSS Attribute Case Insensitive [<img src="https://postcss.github.io/postcss/logo.svg" alt="PostCSS Logo" width="90" height="90" align="right">][postcss]
+
+[<img alt="npm version" src="https://img.shields.io/npm/v/postcss-attribute-case-insensitive.svg" height="20">][npm-url] [<img alt="CSS Standard Status" src="https://cssdb.org/images/badges/case-insensitive-attributes.svg" height="20">][css-url] [<img alt="Build Status" src="https://github.com/csstools/postcss-plugins/workflows/test/badge.svg" height="20">][cli-url] [<img alt="Discord" src="https://shields.io/badge/Discord-5865F2?logo=discord&logoColor=white">][discord]
+
+[PostCSS Attribute Case Insensitive] enables support for [Case Insensitive Attribute] matching in selectors.
+
+```pcss
+[frame=hsides i] {
+	border-style: solid none;
+}
+
+/* becomes */
+
+[frame=hsides],[frame=Hsides],[frame=hSides],[frame=HSides],[frame=hsIdes],[frame=HsIdes],[frame=hSIdes],[frame=HSIdes],[frame=hsiDes],[frame=HsiDes],[frame=hSiDes],[frame=HSiDes],[frame=hsIDes],[frame=HsIDes],[frame=hSIDes],[frame=HSIDes],[frame=hsidEs],[frame=HsidEs],[frame=hSidEs],[frame=HSidEs],[frame=hsIdEs],[frame=HsIdEs],[frame=hSIdEs],[frame=HSIdEs],[frame=hsiDEs],[frame=HsiDEs],[frame=hSiDEs],[frame=HSiDEs],[frame=hsIDEs],[frame=HsIDEs],[frame=hSIDEs],[frame=HSIDEs],[frame=hsideS],[frame=HsideS],[frame=hSideS],[frame=HSideS],[frame=hsIdeS],[frame=HsIdeS],[frame=hSIdeS],[frame=HSIdeS],[frame=hsiDeS],[frame=HsiDeS],[frame=hSiDeS],[frame=HSiDeS],[frame=hsIDeS],[frame=HsIDeS],[frame=hSIDeS],[frame=HSIDeS],[frame=hsidES],[frame=HsidES],[frame=hSidES],[frame=HSidES],[frame=hsIdES],[frame=HsIdES],[frame=hSIdES],[frame=HSIdES],[frame=hsiDES],[frame=HsiDES],[frame=hSiDES],[frame=HSiDES],[frame=hsIDES],[frame=HsIDES],[frame=hSIDES],[frame=HSIDES] {
+	border-style: solid none;
+}
+```
+
+## Usage
+
+Add [PostCSS Attribute Case Insensitive] to your project:
+
+```bash
+npm install postcss postcss-attribute-case-insensitive --save-dev
+```
+
+Use it as a [PostCSS] plugin:
+
+```js
+const postcss = require('postcss');
+const postcssAttributeCaseInsensitive = require('postcss-attribute-case-insensitive');
+
+postcss([
+	postcssAttributeCaseInsensitive(/* pluginOptions */)
+]).process(YOUR_CSS /*, processOptions */);
+```
+
+[PostCSS Attribute Case Insensitive] runs in all Node environments, with special
+instructions for:
+
+| [Node](INSTALL.md#node) | [PostCSS CLI](INSTALL.md#postcss-cli) | [Webpack](INSTALL.md#webpack) | [Create React App](INSTALL.md#create-react-app) | [Gulp](INSTALL.md#gulp) | [Grunt](INSTALL.md#grunt) |
+| --- | --- | --- | --- | --- | --- |
+
+[cli-url]: https://github.com/csstools/postcss-plugins/actions/workflows/test.yml?query=workflow/test
+[css-url]: https://cssdb.org/#case-insensitive-attributes
+[discord]: https://discord.gg/bUadyRwkJS
+[npm-url]: https://www.npmjs.com/package/postcss-attribute-case-insensitive
+
+[Gulp PostCSS]: https://github.com/postcss/gulp-postcss
+[Grunt PostCSS]: https://github.com/nDmitry/grunt-postcss
+[PostCSS]: https://github.com/postcss/postcss
+[PostCSS Loader]: https://github.com/postcss/postcss-loader
+[PostCSS Attribute Case Insensitive]: https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-attribute-case-insensitive
+[Case Insensitive Attribute]: https://www.w3.org/TR/selectors4/#attribute-case

node_modules/postcss-attribute-case-insensitive/dist/index.cjs

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+"use strict";function e(e){return e&&"object"==typeof e&&"default"in e?e:{default:e}}var t=e(require("postcss-selector-parser"));function n(e){return"attribute"===e.type&&e.insensitive}function s(e,t,n){const c=n.charAt(t);if(""===c)return e;let r=e.map((e=>e+c));const o=c.toLocaleUpperCase();return o!==c&&(r=r.concat(e.map((e=>e+o)))),s(r,t+1,n)}function c(e){return s([""],0,e.value).map((t=>{const n=e.clone({spaces:{after:e.spaces.after,before:e.spaces.before},insensitive:!1});return n.setValue(t),n}))}function r(e){let s=[];e.each((e=>{(function(e){return e.some(n)})(e)&&(s=s.concat(function(e){let s=[t.default.selector({value:"",nodes:[]})];return e.walk((e=>{if(!n(e))return void s.forEach((t=>{t.append(e.clone())}));const t=c(e),r=[];t.forEach((e=>{s.forEach((t=>{const n=t.clone({});n.append(e),r.push(n)}))})),s=r})),s}(e)),e.remove())})),s.length&&s.forEach((t=>e.append(t)))}const o=()=>({postcssPlugin:"postcss-attribute-case-insensitive",Rule(e){if(e.selector.includes("i]")){const n=t.default(r).processSync(e.selector);if(n===e.selector)return;e.replaceWith(e.clone({selector:n}))}}});o.postcss=!0,module.exports=o;

node_modules/postcss-attribute-case-insensitive/dist/index.d.ts

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+import type { PluginCreator } from 'postcss';
+declare const creator: PluginCreator<never>;
+export default creator;

node_modules/postcss-attribute-case-insensitive/dist/index.mjs

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+import e from"postcss-selector-parser";function t(e){return"attribute"===e.type&&e.insensitive}function n(e,t,s){const c=s.charAt(t);if(""===c)return e;let o=e.map((e=>e+c));const r=c.toLocaleUpperCase();return r!==c&&(o=o.concat(e.map((e=>e+r)))),n(o,t+1,s)}function s(e){return n([""],0,e.value).map((t=>{const n=e.clone({spaces:{after:e.spaces.after,before:e.spaces.before},insensitive:!1});return n.setValue(t),n}))}function c(n){let c=[];n.each((n=>{(function(e){return e.some(t)})(n)&&(c=c.concat(function(n){let c=[e.selector({value:"",nodes:[]})];return n.walk((e=>{if(!t(e))return void c.forEach((t=>{t.append(e.clone())}));const n=s(e),o=[];n.forEach((e=>{c.forEach((t=>{const n=t.clone({});n.append(e),o.push(n)}))})),c=o})),c}(n)),n.remove())})),c.length&&c.forEach((e=>n.append(e)))}const o=()=>({postcssPlugin:"postcss-attribute-case-insensitive",Rule(t){if(t.selector.includes("i]")){const n=e(c).processSync(t.selector);if(n===t.selector)return;t.replaceWith(t.clone({selector:n}))}}});o.postcss=!0;export{o as default};

node_modules/postcss-attribute-case-insensitive/package.json

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+{
+	"name": "postcss-attribute-case-insensitive",
+	"description": "Enable support for case insensitive attribute matching in selectors",
+	"version": "5.0.2",
+	"contributors": [
+		{
+			"name": "Antonio Laguna",
+			"email": "antonio@laguna.es",
+			"url": "https://antonio.laguna.es"
+		},
+		{
+			"name": "Romain Menke",
+			"email": "romainmenke@gmail.com"
+		},
+		{
+			"name": "Dmitry Semigradsky"
+		}
+	],
+	"license": "MIT",
+	"funding": {
+		"type": "opencollective",
+		"url": "https://opencollective.com/csstools"
+	},
+	"engines": {
+		"node": "^12 || ^14 || >=16"
+	},
+	"main": "dist/index.cjs",
+	"module": "dist/index.mjs",
+	"types": "dist/index.d.ts",
+	"exports": {
+		".": {
+			"import": "./dist/index.mjs",
+			"require": "./dist/index.cjs",
+			"default": "./dist/index.mjs"
+		}
+	},
+	"files": [
+		"CHANGELOG.md",
+		"LICENSE",
+		"README.md",
+		"dist"
+	],
+	"dependencies": {
+		"postcss-selector-parser": "^6.0.10"
+	},
+	"peerDependencies": {
+		"postcss": "^8.2"
+	},
+	"scripts": {
+		"build": "rollup -c ../../rollup/default.js",
+		"clean": "node -e \"fs.rmSync('./dist', { recursive: true, force: true });\"",
+		"docs": "node ../../.github/bin/generate-docs/install.mjs && node ../../.github/bin/generate-docs/readme.mjs",
+		"lint": "npm run lint:eslint && npm run lint:package-json",
+		"lint:eslint": "eslint ./src --ext .js --ext .ts --ext .mjs --no-error-on-unmatched-pattern",
+		"lint:package-json": "node ../../.github/bin/format-package-json.mjs",
+		"prepublishOnly": "npm run clean && npm run build && npm run test",
+		"test": "node .tape.mjs && npm run test:exports",
+		"test:exports": "node ./test/_import.mjs && node ./test/_require.cjs",
+		"test:rewrite-expects": "REWRITE_EXPECTS=true node .tape.mjs"
+	},
+	"homepage": "https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-attribute-case-insensitive#readme",
+	"repository": {
+		"type": "git",
+		"url": "https://github.com/csstools/postcss-plugins.git",
+		"directory": "plugins/postcss-attribute-case-insensitive"
+	},
+	"bugs": "https://github.com/csstools/postcss-plugins/issues",
+	"keywords": [
+		"CSS4",
+		"attribute",
+		"css",
+		"insensitive",
+		"postcss",
+		"postcss-plugin",
+		"sensitive"
+	],
+	"csstools": {
+		"cssdbId": "case-insensitive-attributes",
+		"exportName": "postcssAttributeCaseInsensitive",
+		"humanReadableName": "PostCSS Attribute Case Insensitive",
+		"specUrl": "https://www.w3.org/TR/selectors4/#attribute-case"
+	},
+	"volta": {
+		"extends": "../../package.json"
+	}
+}