feat: use Discord Choice menus for /refractor status parameters

Replace freeform text inputs with dropdown selections:
- card_type: Batter, Starting Pitcher, Relief Pitcher
- tier: T0-T4 with names (Base Card through Superfractor)
- progress: "Close to next tier" option
- Removed season param (not useful for current UX)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

cogs/refractor.py

@@ -15,6 +15,7 @@ from typing import Optional
 
 import discord
 from discord import app_commands
+from discord.app_commands import Choice
 from discord.ext import commands
 
 from api_calls import db_get
@@ -142,19 +143,34 @@ class Refractor(commands.Cog):
         name="status", description="Show your team's refractor progress"
     )
     @app_commands.describe(
-        card_type="Card type filter (batter, sp, rp)",
-        season="Season number (default: current)",
-        tier="Filter by current tier (0-4)",
-        progress='Use "close" to show cards within 80% of their next tier',
+        card_type="Filter by card type",
+        tier="Filter by current tier",
+        progress="Filter by advancement progress",
         page="Page number (default: 1, 10 cards per page)",
     )
+    @app_commands.choices(
+        card_type=[
+            Choice(value="batter", name="Batter"),
+            Choice(value="sp", name="Starting Pitcher"),
+            Choice(value="rp", name="Relief Pitcher"),
+        ],
+        tier=[
+            Choice(value="0", name="T0 — Base Card"),
+            Choice(value="1", name="T1 — Base Chrome"),
+            Choice(value="2", name="T2 — Refractor"),
+            Choice(value="3", name="T3 — Gold Refractor"),
+            Choice(value="4", name="T4 — Superfractor"),
+        ],
+        progress=[
+            Choice(value="close", name="Close to next tier (≥80%)"),
+        ],
+    )
     async def refractor_status(
         self,
         interaction: discord.Interaction,
-        card_type: Optional[str] = None,
-        season: Optional[int] = None,
-        tier: Optional[int] = None,
-        progress: Optional[str] = None,
+        card_type: Optional[Choice[str]] = None,
+        tier: Optional[Choice[str]] = None,
+        progress: Optional[Choice[str]] = None,
         page: int = 1,
     ):
         """Show a paginated view of the invoking user's team refractor progress."""
@@ -171,13 +187,11 @@ class Refractor(commands.Cog):
         offset = (page - 1) * PAGE_SIZE
         params = [("team_id", team["id"]), ("limit", PAGE_SIZE), ("offset", offset)]
         if card_type:
-            params.append(("card_type", card_type))
-        if season is not None:
-            params.append(("season", season))
+            params.append(("card_type", card_type.value))
         if tier is not None:
-            params.append(("tier", tier))
+            params.append(("tier", tier.value))
         if progress:
-            params.append(("progress", progress))
+            params.append(("progress", progress.value))
 
         data = await db_get("refractor/cards", params=params)
         if not data: