Remove '+ תיק חדש' nav link (redundant with home page button)

The home page already has a prominent '+ תיק חדש' button in the hero.
Cases are always opened by clicking a case card on the home list, so
the top-nav link is noise. Keyboard shortcut 'n' still opens the
wizard directly for power users.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

web/static/index.html

@@ -1874,7 +1874,6 @@ kbd {
   <span class="subtitle" id="pageSubtitle">ניהול תיקים</span>
   <nav>
     <a href="#/" id="navHome">תיקים</a>
-    <a href="#/new" id="navNew">+ תיק חדש</a>
     <a href="#/upload" id="navUpload">העלאה</a>
     <a href="#/training" id="navTraining">אימון סגנון</a>
     <a href="#/style-report" id="navStyleReport">הסגנון שלי</a>