Add recipe link, fix step count, add nav counts

- Make recipe name clickable link to recipe page on run detail
- Fix step count to use plan.steps length as fallback
- Add nav_counts support to base template for showing counts in brackets
- Add get_nav_counts helper in dependencies
- Pass nav_counts on home page

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/routers/home.py

@@ -77,6 +77,7 @@ async def home(request: Request):
         user=user,
         readme_html=readme_html,
         stats=stats,
+        nav_counts=stats,  # Reuse stats for nav counts
         active_tab="home",
     )