Add project Bible and consolidate documentation

- Create bible/ as single source of truth (architecture, API, frontend, installation, usage, security, roadmap)
- Verify and fix Bible against actual source code (API methods, endpoints, data flow)
- Trim README.md and CLAUDE.md to minimal stubs pointing to the Bible
- Remove duplicate claude.md (lowercase)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

bible/installation.md

@@ -0,0 +1,87 @@
+# Installation
+
+## Option 1 — Docker (Recommended)
+
+```bash
+docker pull git.mchus.pro/mchus/turborfq:latest
+
+docker run -d \
+  --name turborfq \
+  -p 8080:8080 \
+  -e DB_HOST=your-mariadb-host \
+  -e DB_PORT=3306 \
+  git.mchus.pro/mchus/turborfq:latest
+```
+
+Open http://localhost:8080 in your browser.
+
+### Environment Variables
+
+| Variable | Default | Description |
+|----------|---------|-------------|
+| `DB_HOST` | `localhost` | MariaDB server address |
+| `DB_PORT` | `3306` | MariaDB server port |
+| `DB_CHARSET` | `utf8mb4` | Connection charset |
+
+> When running in Docker, use the host machine's IP or `host.docker.internal` instead of `localhost` for `DB_HOST`.
+
+---
+
+## Option 2 — Manual
+
+### Prerequisites
+
+- PHP 8.1+ with extensions: `pdo_mysql`, `mbstring`, `xml`
+- Composer (global installation recommended)
+- Access to a MariaDB server
+
+Install PHP and tools (Debian/Ubuntu):
+
+```bash
+sudo apt update
+sudo apt install php php-cli php-mbstring php-xml php-mysql unzip git
+```
+
+Install Composer globally:
+
+```bash
+php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
+php composer-setup.php --install-dir=/usr/local/bin --filename=composer
+php -r "unlink('composer-setup.php');"
+```
+
+### Steps
+
+1. Clone the repository:
+
+```bash
+git clone https://git.mchus.pro/mchus/turborfq.git turborfq
+cd turborfq
+```
+
+2. Install PHP dependencies:
+
+```bash
+composer install
+```
+
+3. Start the development server:
+
+```bash
+php -S localhost:8080 -t public
+```
+
+Open http://localhost:8080 in your browser.
+
+> The PHP built-in server is for **development only**. For production use Nginx or Apache with `public/` as document root and `index.php` as the front controller.
+
+---
+
+## Troubleshooting
+
+| Symptom | Likely cause | Fix |
+|---------|-------------|-----|
+| Blank page / PHP errors | `display_errors` off | Enable in `php.ini` or check `docker logs turborfq` |
+| 401 "Not authenticated" | Session cookie missing | Ensure browser accepts cookies; re-login |
+| Cannot connect to MariaDB | Wrong host/port/credentials | Verify `DB_HOST`, `DB_PORT`; test with `mysql` client |
+| CSV import errors | Malformed CSV or type mismatch | Check column types; review per-row errors in response |