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>

src/components/ui/LogoMark.tsx

@@ -1,13 +1,13 @@
 /**
- * Inline SVG brand mark for FlatRender.
+ * Inline SVG brand mark for FlatRender — "Monoline F".
  *
  * Icon meaning:
- *  • Blue rounded square = the platform
- *  • White play triangle  = video / rendering
- *  • Three stacked bars   = flat-design layers / composition
+ *  • Blue rounded square            = the platform / app icon
+ *  • White "F" (stem + stacked arms) = FlatRender lettermark + flat-design layers
+ *  • Small play chevron             = video / rendering, forward motion
  *
- * Rendered inline so it works without a network request and
- * inherits the correct colour in both light and dark contexts.
+ * Rendered inline so it works without a network request and inherits the
+ * correct colour in both light and dark contexts.
  */
 
 interface LogoMarkProps {
@@ -21,22 +21,26 @@ export function LogoMark({ size = 36, className }: LogoMarkProps) {
     <svg
       width={size}
       height={size}
-      viewBox="0 0 40 40"
+      viewBox="0 0 48 48"
       fill="none"
       xmlns="http://www.w3.org/2000/svg"
       aria-hidden
       className={className}
     >
       {/* Blue rounded background */}
-      <rect width="40" height="40" rx="9" fill="#2563EB" />
+      <rect width="48" height="48" rx="12" fill="#2563EB" />
 
-      {/* Play triangle */}
-      <path d="M12 12.5L12 27.5L24.5 20L12 12.5Z" fill="white" />
+      {/* "F" stem */}
+      <rect x="16" y="13" width="3.6" height="22" rx="1.8" fill="white" />
 
-      {/* Flat-design layer bars (decreasing width, right side) */}
-      <rect x="27" y="13" width="7"   height="2.5" rx="1.25" fill="white" fillOpacity="0.9" />
-      <rect x="27" y="18.75" width="5.5" height="2.5" rx="1.25" fill="white" fillOpacity="0.75" />
-      <rect x="27" y="24.5" width="4"   height="2.5" rx="1.25" fill="white" fillOpacity="0.6" />
+      {/* "F" top arm */}
+      <rect x="16" y="13" width="16" height="3.6" rx="1.8" fill="white" />
+
+      {/* "F" middle arm (shorter — flat-design layering cue) */}
+      <rect x="16" y="22.2" width="11" height="3.6" rx="1.8" fill="white" fillOpacity="0.75" />
+
+      {/* Play chevron — video / forward motion */}
+      <path d="M30 29L35.5 32L30 35Z" fill="white" fillOpacity="0.9" />
     </svg>
   );
 }