Bump to 0.7.0

Inline-editable session title/description (autosave, no Save button,
same pattern as device display names), status badge on the session
detail page, dashboard's Recent sessions restyled as a real table,
stats page tab switcher removed, and various card/nav polish.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WzyfRyA7h5rs5SCAahLAWd

package.json

@@ -1,6 +1,6 @@
 {
   "name": "sexy",
-  "version": "0.6.0",
+  "version": "0.7.0",
   "private": true,
   "scripts": {
     "dev": "next dev",