feat: Phase 1 — core game loop complete

New endpoints:
- GET  /cards/:card_id       single card lookup
- POST /packs/buy            purchase pack with coins
- POST /objectives/claim     claim completed objective reward
- GET  /matches              match history (limit/mode query params)
- GET  /sbc/:sbc_id          single SBC lookup

Card pool expanded:
- Bronze: 11 → 30 cards (19 nations)
- Silver: 0 → 20 cards (20 nations)
- Rare Gold: 0 → 10 cards (10 nations)

SBC pool expanded:
- Added 5 new SBCs (tri_nations, silver_to_gold, league_loyalty,
  african_stars, gold_standard)

Infrastructure:
- SQLite WAL mode enabled on pool init
- Foreign key enforcement enabled

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

src/app.rs

@@ -52,14 +52,22 @@ pub async fn build(pool: Pool, cfg: Config) -> Result<Router> {
         .route("/profile", get(routes::profile::get_profile))
         .route("/club", get(routes::club::get_club))
         .route("/cards", get(routes::cards::get_cards))
+        .route("/cards/:card_id", get(routes::cards::get_card))
         .route("/collection", get(routes::cards::get_collection))
         .route("/packs", get(routes::packs::get_packs))
+        .route("/packs/buy", post(routes::packs::post_buy_pack))
         .route("/packs/open/:pack_id", post(routes::packs::post_open_pack))
         .route("/squad", get(routes::squad::get_squad))
         .route("/squad", post(routes::squad::post_squad))
         .route("/objectives", get(routes::objectives::get_objectives))
+        .route(
+            "/objectives/claim",
+            post(routes::objectives::post_claim_objective),
+        )
+        .route("/matches", get(routes::matches::get_matches))
         .route("/matches/result", post(routes::matches::post_match_result))
         .route("/sbc", get(routes::sbc::get_sbcs))
+        .route("/sbc/:sbc_id", get(routes::sbc::get_sbc))
         .route("/sbc/submit", post(routes::sbc::post_sbc_submit))
         .route("/market", get(routes::market::get_market))
         .route("/market/buy", post(routes::market::post_market_buy))