feat: autolink URLs in list items, link picker, and inline edit

- Add autolink Jinja2 filter to detect URLs and make them clickable
- Add link picker dropdown to insert existing link URLs into list item content
- Add inline edit with link picker on each list item row
- Apply autolink filter on list detail and focus available list items

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

routers/focus.py

@@ -11,9 +11,11 @@ from datetime import date, datetime, timezone
 from core.database import get_db
 from core.base_repository import BaseRepository
 from core.sidebar import get_sidebar_data
+from core.template_filters import autolink
 
 router = APIRouter(prefix="/focus", tags=["focus"])
 templates = Jinja2Templates(directory="templates")
+templates.env.filters["autolink"] = autolink
 
 
 @router.get("/")