Initial public push: docs cosmos v4 + AI module + framework groundwork

This is the snapshot the production landing site (nibiru-framework.com) is
deployed from. Brings together the recent splash + docs migration to the v4
"Cosmos" design system, the new in-framework AI module, and the framework
groundwork that backs the framework-reference extraction.

What lands:
- docs/: Astro + Starlight site with the v4 dark cosmic palette, GalaxyHero
  canvas constellation, Mission Control chat (wired to /api/oracle →
  api.neuronetz.ai via providers.mjs Ollama), 5-panel MMVC stage
  (Model · AI · Module · Controller · View), translated EN/DE/JA/ES/FR
  content, PWA + sitemap + llms.txt + Umami analytics.
- docs/design-system/: canonical mockup bundle (source/index-v2.html for
  splash, source/docs-system.html + preview/ for docs, SPEC.md, tokens).
- docs/scripts/extraction/framework-reference-v2.md: deep framework
  reference (~1.6k lines, file:line citations, every public factory and
  idiom — basis for the LoRA training corpus.
- application/module/ai/: AI module with chat / embed / RAG / agent
  plugins, plus pdoQuery / httpGet / fileRead tools and Modelfile +
  smoke-test in training/.
- application/module/users/: user / ACL / form-factory traits used as the
  reference plugin pattern for the framework docs.
- application/settings/config/database/: schema + seed migrations
  including the AI module tables (200–203).
- Form factory + autogenerator changes the framework-reference-v2 covers.

Production secrets stay out: docs/.env, settings.production.ini and
ai.production.ini are all gitignored (.example files are in tree).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

application/module/ai/traits/ai.php

@@ -0,0 +1,19 @@
+<?php
+namespace Nibiru\Module\Ai\Traits;
+
+trait Ai
+{
+    /**
+     * Read a config value with a default. Honours nested . keys, e.g.
+     *   $this->cfg('chat.model', 'qwen2.5-coder:14b')
+     */
+    protected function cfg(string $key, $default = null)
+    {
+        $cfg = $this->config();
+        if (isset($cfg->$key)) return $cfg->$key;
+        // Allow flat-key INI as written in ai.ini ("chat.model = ..." → "chat.model" key)
+        $varname = str_replace('.', '_', $key);
+        if (isset($cfg->$varname)) return $cfg->$varname;
+        return $default;
+    }
+}