Add Symfony payload mapping, fixtures, and QA tooling

client/README.md

@@ -1,75 +1,43 @@
-# React + TypeScript + Vite
+# SignalMap client
 
-This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
+A collaborative danger zone explorer built with React, Vite, and Leaflet. Crowd members can drop signals on an OpenStreetMap base layer; the UI highlights the hottest areas as a heatmap and keeps track of active contributors without any authentication.
 
-Currently, two official plugins are available:
+## Getting started
 
-- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react) uses [Babel](https://babeljs.io/) (or [oxc](https://oxc.rs) when used in [rolldown-vite](https://vite.dev/guide/rolldown)) for Fast Refresh
-- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh
+1. Install dependencies (Node.js 20+ recommended):
 
-## React Compiler
+   ```bash
+   npm install
+   ```
 
-The React Compiler is enabled on this template. See [this documentation](https://react.dev/learn/react-compiler) for more information.
+2. Start the Vite dev server:
 
-Note: This will impact Vite dev & build performances.
+   ```bash
+   npm run dev
+   ```
 
-## Expanding the ESLint configuration
+   The app assumes the API is available at `http://localhost:8000/api.php`. You can override this by setting `VITE_API_BASE` in an `.env` file.
 
-If you are developing a production application, we recommend updating the configuration to enable type-aware lint rules:
+3. Start the lightweight PHP backend (from the repository root):
 
-```js
-export default defineConfig([
-  globalIgnores(['dist']),
-  {
-    files: ['**/*.{ts,tsx}'],
-    extends: [
-      // Other configs...
+   ```bash
+   php -S 0.0.0.0:8000 -t server/public
+   ```
 
-      // Remove tseslint.configs.recommended and replace with this
-      tseslint.configs.recommendedTypeChecked,
-      // Alternatively, use this for stricter rules
-      tseslint.configs.strictTypeChecked,
-      // Optionally, add this for stylistic rules
-      tseslint.configs.stylisticTypeChecked,
+   The backend stores data in `server/var/points.sqlite` (ignored by git). It identifies users by IP address and provides aggregated heatmap cells plus contributor statistics.
 
-      // Other configs...
-    ],
-    languageOptions: {
-      parserOptions: {
-        project: ['./tsconfig.node.json', './tsconfig.app.json'],
-        tsconfigRootDir: import.meta.dirname,
-      },
-      // other options...
-    },
-  },
-])
+## Features
+
+- Leaflet + OpenStreetMap map canvas with a live heat layer (via `leaflet.heat`).
+- Click-to-report interaction that drops a signal at the clicked coordinates.
+- Heatmap aggregation and "danger zone" overlays that spotlight the busiest cells.
+- Live contributor feed showing the most recent pings and top spotters.
+- Accessible, shadcn-inspired UI components without any authentication requirement.
+
+## Production build
+
+```bash
+npm run build
 ```
 
-You can also install [eslint-plugin-react-x](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-x) and [eslint-plugin-react-dom](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-dom) for React-specific lint rules:
-
-```js
-// eslint.config.js
-import reactX from 'eslint-plugin-react-x'
-import reactDom from 'eslint-plugin-react-dom'
-
-export default defineConfig([
-  globalIgnores(['dist']),
-  {
-    files: ['**/*.{ts,tsx}'],
-    extends: [
-      // Other configs...
-      // Enable lint rules for React
-      reactX.configs['recommended-typescript'],
-      // Enable lint rules for React DOM
-      reactDom.configs.recommended,
-    ],
-    languageOptions: {
-      parserOptions: {
-        project: ['./tsconfig.node.json', './tsconfig.app.json'],
-        tsconfigRootDir: import.meta.dirname,
-      },
-      // other options...
-    },
-  },
-])
-```
+The output will be placed in `dist/`. Serve it with your favourite static host while keeping the PHP API reachable at `/api.php`.