feat: initialisation complète du CORE ProxmoxPanel

Backend Go 1.23+ :
- API REST + WebSocket (chi, gorilla/websocket)
- Authentification PAM via SSH + JWT RS256
- Chiffrement AES-256-GCM pour secrets SQLite
- Pool SSH, client Proxmox REST, hub WebSocket pub/sub
- Système de modules compilés à initialisation conditionnelle
- Audit log, migrations SQLite versionnées

Frontend Vue 3 + Vite + TypeScript :
- Thème Neumorphism sombre/clair (CSS custom properties)
- Wizard d'installation, Dashboard drag-drop, Terminal xterm.js
- Toutes les vues CORE + stubs modules optionnels
- i18n EN/FR (vue-i18n v11)

Infrastructure :
- Docker multi-stage (Go → alpine, Node → nginx)
- docker-compose.yml, .gitattributes, LICENSE MIT, README

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

backend/modules/files/README.md

@@ -0,0 +1,41 @@
+# Module — Files
+
+**Type**: Optional (disabled by default)
+
+SFTP-based file browser for the Proxmox host and LXC containers. Navigate, view, edit, upload, and download files directly from the browser.
+
+## Planned Features
+
+- Directory listing with permissions, size, modification date
+- File preview (text, JSON, YAML, shell scripts, logs)
+- File editing via CodeMirror 6 (syntax highlighting for common formats)
+- Upload and download
+- Create/delete files and directories
+- Navigate into LXC containers via `pct exec` or direct SFTP
+
+## Planned API Endpoints
+
+| Method | Path | Auth | Description |
+|--------|------|------|-------------|
+| GET | `/api/files/list` | JWT | List directory contents |
+| GET | `/api/files/read` | JWT | Read file content |
+| PUT | `/api/files/write` | JWT+Admin | Write file content |
+| POST | `/api/files/mkdir` | JWT+Admin | Create directory |
+| DELETE | `/api/files/delete` | JWT+Admin | Delete file or directory |
+| GET | `/api/files/download` | JWT | Download file |
+| POST | `/api/files/upload` | JWT+Admin | Upload file |
+
+Query parameters: `path=<absolute-path>`, `host=<optional-ssh-override>`
+
+## Status
+
+> This module is currently a stub. The UI view is implemented (shows a "module not enabled" placeholder). Full SFTP implementation is planned for a future release.
+
+## Requirements
+
+- SSH/SFTP access to the target host
+- The `ssh_host`, `ssh_username`, `ssh_password` settings must be configured
+
+## License
+
+MIT — see [LICENSE](../../LICENSE)