feat: complete Syndarix rebranding from PragmaStack

- Update PROJECT_NAME to Syndarix in backend config
- Update all frontend components with Syndarix branding
- Replace all GitHub URLs with Gitea Syndarix repo URLs
- Update metadata, headers, footers with new branding
- Update tests to match new URLs
- Update E2E tests for new repo references
- Preserve "Built on PragmaStack" attribution in docs

Closes #13

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/app/[locale]/(authenticated)/layout.tsx

@@ -10,7 +10,7 @@ import { Footer } from '@/components/layout/Footer';
 
 export const metadata: Metadata = {
   title: {
-    template: '%s | PragmaStack',
+    template: '%s | Syndarix',
     default: 'Dashboard',
   },
 };

frontend/src/app/[locale]/admin/layout.tsx

@@ -12,7 +12,7 @@ import { AdminSidebar, Breadcrumbs } from '@/components/admin';
 
 export const metadata: Metadata = {
   title: {
-    template: '%s | Admin | PragmaStack',
+    template: '%s | Admin | Syndarix',
     default: 'Admin Dashboard',
   },
 };

frontend/src/app/[locale]/demos/page.tsx

@@ -26,8 +26,8 @@ import { Badge } from '@/components/ui/badge';
 import { Separator } from '@/components/ui/separator';
 
 export const metadata: Metadata = {
-  title: 'Demo Tour | PragmaStack',
-  description: 'Try all features with demo credentials - comprehensive guide to the PragmaStack',
+  title: 'Demo Tour | Syndarix',
+  description: 'Try all features with demo credentials - comprehensive guide to the Syndarix',
 };
 
 const demoCategories = [

frontend/src/app/[locale]/dev/docs/page.tsx

@@ -120,7 +120,7 @@ export default function DocsHub() {
             <h2 className="text-4xl font-bold tracking-tight mb-4">Design System Documentation</h2>
             <p className="text-lg text-muted-foreground mb-8">
               Comprehensive guides, best practices, and references for building consistent,
-              accessible, and maintainable user interfaces with the PragmaStack design system.
+              accessible, and maintainable user interfaces with the Syndarix design system.
             </p>
             <div className="flex flex-wrap gap-3 justify-center">
               <Link href="/dev/docs/design-system/00-quick-start">

frontend/src/app/[locale]/dev/page.tsx

@@ -14,7 +14,7 @@ import { Badge } from '@/components/ui/badge';
 import { Separator } from '@/components/ui/separator';
 
 export const metadata: Metadata = {
-  title: 'Design System Hub | PragmaStack',
+  title: 'Design System Hub | Syndarix',
   description:
     'Interactive design system demonstrations with live examples - explore components, layouts, spacing, and forms built with shadcn/ui and Tailwind CSS',
 };
@@ -90,7 +90,7 @@ export default function DesignSystemHub() {
             </div>
             <p className="text-lg text-muted-foreground">
               Interactive demonstrations, live examples, and comprehensive documentation for the
-              PragmaStack design system. Built with shadcn/ui + Tailwind CSS 4.
+              Syndarix design system. Built with shadcn/ui + Tailwind CSS 4.
             </p>
           </div>
         </div>

frontend/src/app/[locale]/page.tsx

@@ -1,7 +1,7 @@
 /* istanbul ignore file -- @preserve Landing page with complex interactions tested via E2E */
 /**
  * Homepage / Landing Page
- * Main landing page for the PragmaStack project
+ * Main landing page for the Syndarix project
  * Showcases features, tech stack, and provides demos for developers
  */
 
@@ -68,7 +68,7 @@ export default function Home() {
         <div className="container mx-auto px-6 py-8">
           <div className="flex flex-col md:flex-row items-center justify-between gap-4">
             <div className="text-sm text-muted-foreground">
-              © {new Date().getFullYear()} PragmaStack. MIT Licensed.
+              © {new Date().getFullYear()} Syndarix. MIT Licensed.
             </div>
             <div className="flex items-center gap-6 text-sm text-muted-foreground">
               <Link href="/demos" className="hover:text-foreground transition-colors">

frontend/src/app/globals.css

@@ -1,7 +1,7 @@
 @import 'tailwindcss';
 
 /**
- * PragmaStack Design System
+ * Syndarix Design System
  * Theme: Modern Minimal (from tweakcn.com)
  * Primary: Blue | Color Space: OKLCH
  *