Add global all-events view at / and scope page summary to single page

Root / shows all upcoming events across all pages with page badges.
/<slug>/ reverted to show only that page's events.

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

app.py

@@ -8,7 +8,7 @@ from jinja2 import FileSystemLoader, ChoiceLoader
 
 from shared.infrastructure.factory import create_base_app
 
-from bp import register_calendars, register_markets, register_payments, register_page
+from bp import register_all_events, register_calendars, register_markets, register_payments, register_page
 
 
 async def events_context() -> dict:
@@ -55,6 +55,12 @@ def create_app() -> "Quart":
         app.jinja_loader,
     ])
 
+    # All events: / — global view across all pages
+    app.register_blueprint(
+        register_all_events(),
+        url_prefix="/",
+    )
+
     # Page summary: /<slug>/ — upcoming events across all calendars
     app.register_blueprint(
         register_page(),