web: DRY Step 5 and alternatives (partial+macro), centralize start_ctx/owned_set, adopt builder_*

code/web/services/summary_utils.py

@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+from typing import Any, Dict
+from deck_builder import builder_constants as bc
+from .build_utils import owned_set as owned_set_helper
+from .combo_utils import detect_for_summary as _detect_for_summary
+
+
+def summary_ctx(
+    *,
+    summary: dict | None,
+    commander: str | None = None,
+    tags: list[str] | None = None,
+    include_versions: bool = True,
+) -> Dict[str, Any]:
+    """Build a unified context payload for deck summary panels.
+
+    Provides owned_set, game_changers, combos/synergies, and detector versions.
+    """
+    det = _detect_for_summary(summary, commander_name=commander or "") if summary else {"combos": [], "synergies": [], "versions": {}}
+    combos = det.get("combos", [])
+    synergies = det.get("synergies", [])
+    versions = det.get("versions", {} if include_versions else None)
+    return {
+        "owned_set": owned_set_helper(),
+        "game_changers": bc.GAME_CHANGERS,
+        "combos": combos,
+        "synergies": synergies,
+        "versions": versions,
+        "commander": commander,
+        "tags": tags or [],
+    }