feat(api, web): implement short install link functionality for agents

- Added new API endpoints for creating, retrieving, and revoking install links for agents.
- Enhanced the agent installation process with short links accessible via `/agent-install/:id` and `/:slug`.
- Updated the README and documentation to reflect the new installation method and usage instructions.
- Refactored relevant components in the web application to support the new install link feature.
- Improved error handling and validation for install link operations.

Co-authored-by: Cursor <[email protected]>

docs/agents.md

@@ -1,6 +1,20 @@
 # Agents
 
-## Linux
+## Short install (рекомендуется)
+
+В UI `/agents` → **Добавить агента** создаёт install-ссылку. На хосте:
+
+```bash
+curl -fsSL https://<cp>/agent-install/<id> | bash
+# или короткий slug:
+curl -fsSL https://<cp>/<slug> | bash
+```
+
+Скрипт уже содержит `EVOFW_CP_URL`, `EVOFW_SEED`, `EVOFW_CLIENT_NAME`. После enroll одобрите агента во вкладке Pending.
+
+API (auth): `POST /api/v1/install-links` `{ "name": "web-01", "platform": "linux" }`.
+
+## Linux (legacy one-liner)
 
 ```bash
 curl -fsSL https://<cp>/v1/agent/install.sh | \