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/page.tsx

@@ -44,7 +44,7 @@ export default function Home() {
                 <p className="text-xl text-surface-300 max-w-lg leading-relaxed">
                   Just say &ldquo;deploy Plex&rdquo; — DashCaddy&rsquo;s AI Intent Router handles the rest.
                   Deploy Docker apps with one click, automatic SSL, DNS, and reverse proxy.
-                  76+ templates, fleet management, and an MCP control plane for AI assistants.
+                  92+ templates, fleet management, and an MCP control plane for AI assistants.
                   Everything you need for self-hosted perfection.
                 </p>
               </div>
@@ -206,8 +206,8 @@ export default function Home() {
             />
             <FeatureCard
               icon="🚀"
-              title="76+ App Templates"
-              description="Choose from 76+ pre-configured Docker app templates. Deploy your favorite applications instantly without manual configuration."
+              title="92+ App Templates"
+              description="Choose from 92+ pre-configured Docker app templates. Deploy your favorite applications instantly without manual configuration."
             />
             <FeatureCard
               icon="🛡️"
@@ -396,7 +396,7 @@ export default function Home() {
                       <span className="text-surface-500">Write your own compose files</span>
                     </td>
                     <td className="px-6 py-4 text-center text-sm">
-                      <span className="text-green-400 font-semibold">✓ 76+ pre-configured</span>
+                      <span className="text-green-400 font-semibold">✓ 92+ pre-configured</span>
                     </td>
                   </tr>
                   <tr className="hover:bg-surface-800/30 transition-colors">