docs: update website to reflect actual v0.7.0 release

Fix version numbers in documentation to match the actual released version.
The features were released as v0.7.0 (minor) rather than v0.6.2 (patch).

Author: prosdev

website/content/latest-version.ts

@@ -4,9 +4,9 @@
  */
 
 export const latestVersion = {
-  version: '0.6.2',
+  version: '0.7.0',
   title: 'UX & TypeScript Performance Improvements',
   date: 'December 11, 2025',
   summary: 'Enhanced user experience and configurable TypeScript performance optimizations.',
-  link: '/updates#v062--ux--typescript-performance-improvements',
+  link: '/updates#v070--ux--typescript-performance-improvements',
 } as const;

website/content/updates/index.mdx

@@ -9,7 +9,7 @@ What's new in dev-agent. We ship improvements regularly to help AI assistants un
 
 ---
 
-## v0.6.2 — UX & TypeScript Performance Improvements
+## v0.7.0 — UX & TypeScript Performance Improvements
 
 *December 11, 2025*