Phase 4: Page() collects component media; drop manual scripts= threading

Page() now calls collect_media(content) and emits the ModuleScript /
StaticScript tags itself, so views no longer thread scripts= for
component-owned JS. The list views (game/session/purchase/device/
platform/playevent) compose with Fragment(filter_bar, content) instead of
mark_safe(str(filter_bar) + str(content)) — keeping the node tree intact
so the filter bar's media (filter_bar.js + search_select.js +
range_slider.js, and date_range_picker.js on purchases) reaches Page().
The stats views drop _STATS_SCRIPTS; YearPicker's datepicker.umd.js is
collected from its declared media.

The scripts= argument remains for page-specific glue not owned by a
component (the add-form helpers add_game.js / add_purchase.js /
add_session.js, alongside search_select.js for their form widgets).

Adds regression tests asserting the list and stats pages auto-load their
widget scripts with no scripts= in the view, and documents the node/
media model in CLAUDE.md.

https://claude.ai/code/session_01BKurBhE3Qj25p7Bfsg7EeK

games/views/general.py

@@ -13,16 +13,14 @@ from django.urls import reverse
 from django.utils.timezone import localtime
 from django.utils.timezone import now as timezone_now
 
-from common.components import StaticScript
 from common.layout import render_page
 from common.time import format_duration
 from games.models import Game, Platform, Purchase, Session
 from games.views.stats_content import stats_content
 from games.views.stats_data import compute_stats
 
-# Flowbite-datepicker UMD bundle (vendored, v2.0.0), hoisted into the stats
-# pages for YearPicker.
-_STATS_SCRIPTS = StaticScript("datepicker.umd.js")
+# The Flowbite-datepicker UMD bundle is declared as media on the YearPicker
+# component, so Page() loads it automatically on the stats pages.
 
 
 def model_counts(request: HttpRequest) -> dict[str, bool]:
@@ -76,9 +74,7 @@ def use_custom_redirect(
 def stats_alltime(request: HttpRequest) -> HttpResponse:
     request.session["return_path"] = request.path
     data = compute_stats(None)
-    return render_page(
-        request, stats_content(data), title=data["title"], scripts=_STATS_SCRIPTS
-    )
+    return render_page(request, stats_content(data), title=data["title"])
 
 
 @login_required
@@ -92,9 +88,7 @@ def stats(request: HttpRequest, year: int = 0) -> HttpResponse:
         return HttpResponseRedirect(reverse("games:stats_alltime"))
     request.session["return_path"] = request.path
     data = compute_stats(year)
-    return render_page(
-        request, stats_content(data), title=data["title"], scripts=_STATS_SCRIPTS
-    )
+    return render_page(request, stats_content(data), title=data["title"])
 
 
 @login_required