Minor: Set completion tracking (#19)

core/include/ccm/games/pokemon/PokemonCardPreviewSource.hpp

@@ -1,11 +1,11 @@
 #pragma once
 
 // PokemonCardPreviewSource: ICardPreviewSource implementation for the Pokemon
-// TCG. Calls the Pokemon TCG search endpoint at
-//   https://api.pokemontcg.io/v2/cards?q=name:"<name>" set.id:<setId> number:<setNo>
-// and returns `data[0].images.large` (with `images.small` as a graceful
-// fallback). Mirrors the established `getImage` flow in
-// `src/components/pokemon/SelectedPokemonPanel.tsx`.
+// TCG. When set id + collector number are both known, prefers
+//   GET https://api.pokemontcg.io/v2/cards/{setId}-{number}
+// then falls back to a name-less search `set.id:… number:…`. Name-based
+// search is kept for lookups that lack a set number (or set id). Returns
+// `images.large` (with `images.small` as a graceful fallback).
 
 #include "ccm/ports/ICardPreviewSource.hpp"
 #include "ccm/ports/IHttpClient.hpp"
@@ -32,24 +32,37 @@ public:
                                                                std::string_view setId) override;
 
     // Build the fully URL-encoded Pokemon TCG search URL for the given card.
+    // When both setId and setNo are non-empty, omits the name: clause so the
+    // Lucene query cannot miss on name∩number intersections.
     // Exposed for unit testing and to keep encoding rules in one place.
     static std::string buildSearchUrl(std::string_view name,
                                       std::string_view setId,
                                       std::string_view setNo);
 
+    // Direct card endpoint: /v2/cards/{setId}-{normalizedNumber}.
+    static std::string buildCardByIdUrl(std::string_view setId, std::string_view setNo);
+
+    // Strip everything after the first '/' (e.g. "4/102" -> "4"). Used by
+    // preview lookups, auto-detect, and set-completion ownership matching.
+    static std::string normalizeCollectorNumber(std::string_view setNo);
+
     // Slimmer search URL for auto-detect: omits the number clause and asks the
     // API for only the fields the print-variant parser needs.
     static std::string buildDetectSearchUrl(std::string_view name,
                                             std::string_view setId);
 
-    // Parse a Pokemon TCG /v2/cards response body and pull out the image URL
-    // for the first matching card. Prefers `images.large`, falls back to
-    // `images.small`. Errors are classified:
+    // Parse a Pokemon TCG /v2/cards *search* response body (`data` array) and
+    // pull out the image URL for the first matching card. Prefers
+    // `images.large`, falls back to `images.small`. Errors are classified:
     //   - JSON parse failure or missing/non-array `data` => Transient.
     //   - Empty `data` array or missing image variants => NotFound.
     static Result<std::string, PreviewLookupError>
         parseResponse(const std::string& body);
 
+    // Parse a Pokemon TCG /v2/cards/{id} response (`data` object).
+    static Result<std::string, PreviewLookupError>
+        parseCardByIdResponse(const std::string& body);
+
     // Enumerate distinct collector numbers (and rarities) for an exact card
     // name inside the chosen set. Exposed for unit testing without HTTP.
     static Result<std::vector<AutoDetectedPrint>>