feat: add api key auth, devii agent, openai gateway, and admin service management

This commit introduces a comprehensive set of new features including API key authentication with CLI management commands (get, reset, backfill), a Devii agentic assistant with WebSocket terminal and session bootstrap, an OpenAI-compatible LLM gateway service, and an admin service management panel. It also adds Playwright browser automation for bot support, configures internal gateway URLs, refactors content editing/deletion to support JSON API responses, and updates documentation across AGENTS.md, README.md, and the developer docs site.

devplacepy/templates/project_detail.html

@@ -29,7 +29,7 @@
             {% set _size = 32 %}{% set _size_class = "sm" %}{% set _user = author %}{% include "_avatar_link.html" %}
             <div>
                 {% set _user = author %}{% set _class = none %}{% include "_user_link.html" %}
-                {% if author and author.get('role') %}
+                {% if is_admin(user) and author and author.get('role') %}
                 <span style="font-size: 0.75rem; color: var(--text-muted);">&middot; {{ author['role'] }}</span>
                 {% endif %}
             </div>