fix: update tool count to 51, refresh hero copy and login page

- Update stale tool counts (48/49/50) to 51 across all apps, docs, and tests
- Add Meme Generator to landing page bento grid (was missing)
- Add 12 SEO-friendly rotating phrases to hero typing cursor
- Change landing hero subtitle to "Every image tool you need."
- Replace outdated login page copy with branded hero + rotating phrases

apps/web/src/components/settings/settings-dialog.tsx

@@ -2460,7 +2460,7 @@ function AboutSection() {
           </div>
         </div>
         <p className="text-sm text-muted-foreground">
-          A self-hosted, privacy-first image processing suite with 50 tools. Resize, compress,
+          A self-hosted, privacy-first image processing suite with 51 tools. Resize, compress,
           convert, watermark, and automate your image workflows without sending data to the cloud.
         </p>
         <div className="flex items-center gap-4 text-sm">