🎨 chore: integrate ESLint header automation with AGPL-3.0 notice

• Added `.eslintrc.cjs`
  - Enables `header` + `react-hooks` plugins
  - Inserts standardized AGPL-3.0 license banner for © 2025 QuantumNous
  - JS/JSX parsing & JSX support configured

• Installed dev-deps: `eslint`, `eslint-plugin-header`, `eslint-plugin-react-hooks`

• Updated `web/package.json` scripts
  - `eslint` → lint with cache
  - `eslint:fix` → auto-insert/repair license headers

• Executed `eslint --fix` to prepend license banner to all JS/JSX files

• Ignored runtime cache
  - Added `.eslintcache` to `.gitignore` & `.dockerignore`

Result: consistent AGPL-3.0 license headers, reproducible linting across local dev & CI.

web/postcss.config.js

@@ -1,3 +1,22 @@
+/*
+Copyright (C) 2025 QuantumNous
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+For commercial licensing, please contact support@quantumnous.com
+*/
+
 export default {
   plugins: {
     tailwindcss: {},