Fix: replace non-existent apps with real templates, fix 500 errors on old doc paths

- AppShowcase: Removed 7 non-existent apps (Kaleidescape, Synology Photos, Homelabs, DockSTARTer, Unraid, TrueNAS, New Relic), added 50+ real app templates that exist in code
- Updated template count from 76+ to 92+ across all pages
- Fixed test count from 1400+ to 775+ (actual count)
- Added mod_rewrite fallback for old doc path redirects (fixes 500 errors)
- Added caching, compression, and proper error handling in .htaccess

src/app/features/page.tsx

@@ -40,11 +40,11 @@ export default function FeaturesPage() {
       id: 'app-deployment',
       title: 'App Deployment',
       description:
-        'Deploy from a library of 76+ pre-configured Docker templates with one click. Automatic configuration, smart defaults, and service discovery that auto-detects running containers and lets you adopt them instantly. From zero to live in seconds.',
+        'Deploy from a library of 92+ pre-configured Docker templates with one click. Automatic configuration, smart defaults, and service discovery that auto-detects running containers and lets you adopt them instantly. From zero to live in seconds.',
       icon: '🚀',
       features: [
         { icon: '⚡', label: 'One-click deployment' },
-        { icon: '📦', label: '76+ app templates' },
+        { icon: '📦', label: '92+ app templates' },
         { icon: '⚙️', label: 'Automatic configuration' },
         { icon: '🔍', label: 'Service Discovery & auto-adopt' },
         { icon: '🧙', label: 'Smart Defaults Wizard' },
@@ -350,7 +350,7 @@ export default function FeaturesPage() {
               </div>
               <ul className="space-y-3">
                 {[
-                  '76+ one-click app templates',
+                  '92+ one-click app templates',
                   'Automatic SSL certificates',
                   'Technitium DNS automation',
                   'Reverse proxy + Caddyfile builder',