Reorganize homepage: two divisions, Projects section, Fullum partner, project images

- Hero reworked to "Model. Optimize. Validate." with both-fields messaging
- Nav: Simulation / Optical Science / Projects / About / Contact
- New Projects section with 4 cards (GigaBIT, folded Newtonian, interferometer, polisher) using real card images
- Optiques Fullum as a standalone partner/collaboration block (not a project), with logo
- Optical Science: 6 uniform capability cards; emerald/teal palette across the site
- Tools updated to current Siemens naming (Designcenter, Simcenter 3D)
- Company About + legal name; optimization CTA; French page mirrored
- OIQ-safe wording throughout; no em dashes

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.htaccess

@@ -0,0 +1,30 @@
+# Atomaste Static Site
+Options -Indexes
+
+# Redirect old broken URLs to homepage
+RedirectMatch 301 ^/custom-telescope-mirror-support.*$ /
+RedirectMatch 301 ^/product.*$ /
+RedirectMatch 301 ^/shop.*$ /
+
+# Redirect to index.html as default
+DirectoryIndex index.html
+
+# Enable GZIP compression
+<IfModule mod_deflate.c>
+    AddOutputFilterByType DEFLATE text/html text/css application/javascript image/svg+xml
+</IfModule>
+
+# Cache static assets
+<IfModule mod_expires.c>
+    ExpiresActive On
+    ExpiresByType image/png "access plus 1 month"
+    ExpiresByType image/svg+xml "access plus 1 month"
+    ExpiresByType text/css "access plus 1 week"
+</IfModule>
+
+# Security Headers
+<IfModule mod_headers.c>
+    Header set X-Content-Type-Options "nosniff"
+    Header set X-Frame-Options "SAMEORIGIN"
+    Header set Referrer-Policy "strict-origin-when-cross-origin"
+</IfModule>