Update NameWithIcon

The `NameWithIcon()` function had a `platform` parameter that was immediately overwritten by `platform = None` and never used (dead code). The function mixed data lookup (database queries via IDs) with rendering, making it untestable.

**Fix**: Refactored `NameWithIcon()` to follow the `LinkedPurchase` pattern — accepts model objects (`Game`, `Session`) instead of IDs. Extracted `_resolve_name_with_icon()` helper for testable computation logic (name resolution, platform extraction, link creation). Fixed bug where `platform` was not extracted when `session` parameter was passed. Removed dead `platform` parameter from the public API. Updated all 3 production call sites (already using model objects). Added 10 unit tests for `_resolve_name_with_icon()` covering session override, custom names, linkify behavior, platform resolution, and edge cases. Updated 6 integration tests to use model-based parameters.

games/views/game.py

@@ -104,7 +104,7 @@ def list_games(request: HttpRequest, search_string: str = "") -> HttpResponse:
             ],
             "rows": [
                 [
-                    NameWithIcon(game_id=game.pk),
+                    NameWithIcon(game=game),
                     PopoverTruncated(
                         game.sort_name
                         if game.sort_name is not None and game.name != game.sort_name
@@ -308,9 +308,7 @@ def view_game(request: HttpRequest, game_id: int) -> HttpResponse:
         "columns": ["Game", "Date", "Duration", "Actions"],
         "rows": [
             [
-                NameWithIcon(
-                    session_id=session.pk,
-                ),
+                NameWithIcon(session=session),
                 f"{local_strftime(session.timestamp_start)}{f' — {local_strftime(session.timestamp_end, timeformat)}' if session.timestamp_end else ''}",
                 session.duration_formatted_with_mark,
                 render_to_string(