Add admin panel with CRUD endpoints and management UI

Add admin API endpoints for games, routes, pokemon, and route encounters
with full CRUD operations including bulk import. Build admin frontend
with game/route/pokemon management pages, navigation, and data tables.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/src/app/schemas/pokemon.py

@@ -1,3 +1,5 @@
+from pydantic import BaseModel
+
 from app.schemas.base import CamelModel
 
 
@@ -21,3 +23,48 @@ class RouteEncounterResponse(CamelModel):
 
 class RouteEncounterDetailResponse(RouteEncounterResponse):
     pokemon: PokemonResponse
+
+
+# --- Admin schemas ---
+
+
+class PokemonCreate(CamelModel):
+    national_dex: int
+    name: str
+    types: list[str]
+    sprite_url: str | None = None
+
+
+class PokemonUpdate(CamelModel):
+    national_dex: int | None = None
+    name: str | None = None
+    types: list[str] | None = None
+    sprite_url: str | None = None
+
+
+class RouteEncounterCreate(CamelModel):
+    pokemon_id: int
+    encounter_method: str
+    encounter_rate: int
+    min_level: int
+    max_level: int
+
+
+class RouteEncounterUpdate(CamelModel):
+    encounter_method: str | None = None
+    encounter_rate: int | None = None
+    min_level: int | None = None
+    max_level: int | None = None
+
+
+class BulkImportItem(BaseModel):
+    national_dex: int
+    name: str
+    types: list[str]
+    sprite_url: str | None = None
+
+
+class BulkImportResult(CamelModel):
+    created: int
+    updated: int
+    errors: list[str]