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>

services/identity/FlatRender.IdentitySvc/Application/Services/TokenService.cs

@@ -21,6 +21,9 @@ public class TokenService(IConfiguration config) : ITokenService
         var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_secret));
         var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);
 
+        // Role claim drives [Authorize(Roles = "...")] in the other services.
+        var role = user.IsAdmin ? "Admin" : user.IsTenantAdmin ? "TenantAdmin" : "User";
+
         var claims = new List<Claim>
         {
             new(JwtRegisteredClaimNames.Sub, user.Id.ToString()),
@@ -29,6 +32,7 @@ public class TokenService(IConfiguration config) : ITokenService
             new("tenant_slug", tenant.Slug),
             new("is_admin", user.IsAdmin.ToString().ToLower()),
             new("is_tenant_admin", user.IsTenantAdmin.ToString().ToLower()),
+            new("role", role),
         };
 
         if (!string.IsNullOrEmpty(user.Email))