Add genlocke cumulative graveyard with backend endpoint and UI

Aggregates all fainted encounters across every leg of a genlocke into a
unified graveyard view. Backend serves GET /genlockes/{id}/graveyard with
per-entry leg/game context and summary stats (total deaths, deaths per
leg, deadliest leg). Frontend adds a toggle button on the genlocke detail
page that reveals a filterable/sortable grid of grayscale Pokemon cards.

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

backend/src/app/schemas/genlocke.py

@@ -2,6 +2,7 @@ from datetime import datetime
 
 from app.schemas.base import CamelModel
 from app.schemas.game import GameResponse
+from app.schemas.pokemon import PokemonResponse
 
 
 class GenlockeCreate(CamelModel):
@@ -87,3 +88,33 @@ class GenlockeDetailResponse(CamelModel):
     legs: list[GenlockeLegDetailResponse] = []
     stats: GenlockeStatsResponse
     retired_pokemon: dict[int, RetiredPokemonResponse] = {}
+
+
+# --- Graveyard schemas ---
+
+
+class GraveyardEntryResponse(CamelModel):
+    id: int
+    pokemon: PokemonResponse
+    current_pokemon: PokemonResponse | None = None
+    nickname: str | None = None
+    catch_level: int | None = None
+    faint_level: int | None = None
+    death_cause: str | None = None
+    is_shiny: bool = False
+    route_name: str
+    leg_order: int
+    game_name: str
+
+
+class GraveyardLegSummary(CamelModel):
+    leg_order: int
+    game_name: str
+    death_count: int
+
+
+class GenlockeGraveyardResponse(CamelModel):
+    entries: list[GraveyardEntryResponse]
+    total_deaths: int
+    deaths_per_leg: list[GraveyardLegSummary]
+    deadliest_leg: GraveyardLegSummary | None = None