feat: AI SEO generator, full admin panel, i18n sweep, new logo + auth/RTL fixes

AI SEO content generator
- content-svc: per-tenant OpenAI config (ai_settings) + /v1/ai endpoints
  (settings GET/PUT, seo-post) with SEO-expert prompt → structured article
- admin UI to configure token/base-url/model and generate + save as blog
- configurable base URL for restricted networks

Full data-driven admin panel
- generic /api/admin/resource proxy + reusable AdminResource component
- categories/tags/fonts/blogs (CRUD), users (list + ban), plans/slides
- AI content section; nav + i18n

i18n localization sweep
- localized 116 user-facing + studio/editor components to next-intl (fa+en)
  under the auto.* namespace; merge tooling in scripts/merge-i18n.js

Branding + assets
- Monoline F logo (LogoMark + favicon)
- offline SVG placeholder generator (/api/placeholder), dropped picsum.photos

Fixes
- JWT issuer mismatch on content/studio (flatrender → flatrender-identity)
- missing role claim → [Authorize(Roles="Admin")] now works (RBAC)
- Secure cookies broke HTTP sessions → gated behind AUTH_COOKIE_SECURE
- Radix RTL via DirectionProvider (right-aligned menus in fa)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

public/favicon.svg

@@ -1,7 +1,7 @@
-<svg width="32" height="32" viewBox="0 0 40 40" fill="none" xmlns="http://www.w3.org/2000/svg">
-  <rect width="40" height="40" rx="9" fill="#2563EB"/>
-  <path d="M12 12.5L12 27.5L24.5 20L12 12.5Z" fill="white"/>
-  <rect x="27" y="13" width="7" height="2.5" rx="1.25" fill="white" fill-opacity="0.9"/>
-  <rect x="27" y="18.75" width="5.5" height="2.5" rx="1.25" fill="white" fill-opacity="0.75"/>
-  <rect x="27" y="24.5" width="4" height="2.5" rx="1.25" fill="white" fill-opacity="0.6"/>
+<svg width="32" height="32" viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <rect width="48" height="48" rx="12" fill="#2563EB"/>
+  <rect x="16" y="13" width="3.6" height="22" rx="1.8" fill="white"/>
+  <rect x="16" y="13" width="16" height="3.6" rx="1.8" fill="white"/>
+  <rect x="16" y="22.2" width="11" height="3.6" rx="1.8" fill="white" fill-opacity="0.75"/>
+  <path d="M30 29L35.5 32L30 35Z" fill="white" fill-opacity="0.9"/>
 </svg>