Phase 10: card upgrade system (chemistry styles, position change, training)

- GET /chemistry-styles — lists 18 FUT-style chemistry styles with stat boost breakdowns
- POST /collection/:id/chemistry-style — apply a style (Shadow, Hunter, Anchor, etc.)
- POST /collection/:id/position — override a player's position for 500 coins
- POST /collection/:id/training — add +1/+2/+3 OVR training bonus (max +3 total)
- GET /collection now includes chemistry_style, position_override, training_bonus,
  effective_overall and effective_position fields per owned card
- Migration 0007 adds three columns to owned_cards with safe defaults
- 10 new integration tests — all 55 pass, clippy clean

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

src/app.rs

@@ -2,6 +2,7 @@ use crate::middleware::{limit_concurrency, MakeRequestUuid};
 use crate::{
     config::Config,
     db::Pool,
+    models::chemistry_style::{load_chemistry_styles, ChemistryStyle},
     models::event::EventDefinition,
     models::objective::{ObjectiveDefinition, ObjectiveType},
     models::pack::PackDefinition,
@@ -35,6 +36,7 @@ pub struct AppState {
     pub obj_defs: Arc<Vec<ObjectiveDefinition>>,
     pub sbc_defs: Arc<Vec<SbcDefinition>>,
     pub event_defs: Arc<Vec<EventDefinition>>,
+    pub chem_styles: Arc<Vec<ChemistryStyle>>,
 }
 
 pub async fn build(pool: Pool, cfg: Config) -> Result<Router> {
@@ -43,14 +45,16 @@ pub async fn build(pool: Pool, cfg: Config) -> Result<Router> {
     let obj_defs = Arc::new(load_objective_definitions(&cfg.data_dir)?);
     let sbc_defs = Arc::new(load_sbc_definitions(&cfg.data_dir)?);
     let event_defs = Arc::new(load_event_definitions(&cfg.data_dir)?);
+    let chem_styles = Arc::new(load_chemistry_styles(&cfg.data_dir)?);
 
     tracing::info!(
-        "Loaded {} cards, {} packs, {} objectives, {} SBCs, {} events",
+        "Loaded {} cards, {} packs, {} objectives, {} SBCs, {} events, {} chemistry styles",
         card_db.cards.len(),
         pack_defs.len(),
         obj_defs.len(),
         sbc_defs.len(),
         event_defs.len(),
+        chem_styles.len(),
     );
 
     let state = AppState {
@@ -60,6 +64,7 @@ pub async fn build(pool: Pool, cfg: Config) -> Result<Router> {
         obj_defs: obj_defs.clone(),
         sbc_defs,
         event_defs: event_defs.clone(),
+        chem_styles,
     };
 
     // Background task: refresh NPC market at startup and every 24 hours
@@ -130,6 +135,22 @@ pub async fn build(pool: Pool, cfg: Config) -> Result<Router> {
             "/collection/:owned_card_id",
             delete(routes::cards::delete_owned_card),
         )
+        .route(
+            "/collection/:owned_card_id/chemistry-style",
+            post(routes::upgrades::post_apply_chemistry_style),
+        )
+        .route(
+            "/collection/:owned_card_id/position",
+            post(routes::upgrades::post_change_position),
+        )
+        .route(
+            "/collection/:owned_card_id/training",
+            post(routes::upgrades::post_apply_training),
+        )
+        .route(
+            "/chemistry-styles",
+            get(routes::upgrades::get_chemistry_styles),
+        )
         .route("/packs", get(routes::packs::get_packs))
         .route("/packs/history", get(routes::packs::get_pack_history))
         .route("/packs/buy", post(routes::packs::post_buy_pack))