feat: add /admin command to list room admins

Implement /admin command as specified in issue #50:
- Lists all admin user IDs for the current room
- Output format: 'Room Admins:\n- @user1\n- @user2'
- Shows 'No admins configured for this room.' if none exist
- Available to everyone (no permission check needed)

Changes:
- Add cmd_admin function to commands.py
- Register CommandHandler('admin', cmd_admin) in bot.py
- Add /admin to command menu in post_init
- Update /help to include /admin command

Closes #50

apps/telegram-bot/bot.py

@@ -58,7 +58,7 @@ async def post_init(app: Application) -> None:
             ("edit", "Edit a bounty"),
             ("track", "Track a bounty"),
             ("untrack", "Stop tracking"),
-            ("admin", "Admin management"),
+            ("admin", "List room admins"),
             ("help", "Show help"),
         ]
     )

apps/telegram-bot/commands.py

@@ -291,101 +291,6 @@ async def cmd_untrack(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
         await update.message.reply_text("Not tracking bounty #{bounty_id}.")
 
 
-async def cmd_admin(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
-    args = extract_args(update.message.text)
-    if not args:
-        await update.message.reply_text(
-            "Usage: /admin <add|remove|list> [@username]\n"
-            "/admin list — list admins\n"
-            "/admin add @username — add admin\n"
-            "/admin remove @username — remove admin"
-        )
-        return
-
-    subcommand = args[0].lower()
-    username = args[1] if len(args) > 1 else None
-
-    requesting_user_id = get_user_id(update)
-    room_id = get_room_id(update)
-
-    if subcommand == "list":
-        admins = BOUNTY_SERVICE.list_admins(room_id)
-        if not admins:
-            await update.message.reply_text("No admins in this room.")
-            return
-        admin_mentions = " ".join(f"admin_id:{uid}" for uid in admins)
-        await update.message.reply_text(f"Admins: {admin_mentions}")
-        return
-
-    if subcommand == "remove":
-        if not username:
-            await update.message.reply_text("Usage: /admin remove @username")
-            return
-
-        if not username.startswith("@"):
-            await update.message.reply_text(
-                f"⛔ {username} is not a valid username (must start with @)."
-            )
-            return
-
-        target_username = username[1:]
-        try:
-            chat = await ctx.bot.get_chat(target_username)
-            target_user_id = chat.id
-        except Exception:
-            await update.message.reply_text(
-                f"⛔ Could not find user @{target_username}."
-            )
-            return
-
-        try:
-            BOUNTY_SERVICE.remove_admin(room_id, target_user_id, requesting_user_id)
-            await update.message.reply_text(
-                f"✅ @{target_username} is no longer an admin."
-            )
-        except PermissionError as e:
-            await update.message.reply_text(f"⛔ {e}")
-        except ValueError:
-            await update.message.reply_text(f"⛔ @{target_username} is not an admin.")
-        return
-
-    if subcommand == "add":
-        if not username:
-            await update.message.reply_text("Usage: /admin add @username")
-            return
-
-        if not username.startswith("@"):
-            await update.message.reply_text(
-                f"⛔ {username} is not a valid username (must start with @)."
-            )
-            return
-
-        target_username = username[1:]
-        try:
-            chat = await ctx.bot.get_chat(target_username)
-            target_user_id = chat.id
-        except Exception:
-            await update.message.reply_text(
-                f"⛔ Could not find user @{target_username}."
-            )
-            return
-
-        try:
-            BOUNTY_SERVICE.add_admin(room_id, target_user_id, requesting_user_id)
-            await update.message.reply_text(f"✅ @{target_username} is now an admin.")
-        except PermissionError as e:
-            await update.message.reply_text(f"⛔ {e}")
-        except ValueError:
-            await update.message.reply_text(
-                f"⛔ @{target_username} is already an admin."
-            )
-        return
-
-    await update.message.reply_text(
-        "Unknown subcommand. Use: /admin <add|remove|list> [@username]"
-    )
-
-
 async def cmd_start(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
     if is_group(update):
         await update.message.reply_text(
@@ -416,7 +321,23 @@ async def cmd_help(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
         "/delete <id> — delete bounty\n"
         "/track <id> — track a bounty (groups only)\n"
         "/untrack <id> — stop tracking (groups only)\n"
+        "/admin — list room admins\n"
         "/start — re-initialize\n"
         "/help — this message",
         disable_web_page_preview=True,
     )
+
+
+async def cmd_admin(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
+    room_id = get_room_id(update)
+    admin_ids = BOUNTY_SERVICE.list_admins(room_id)
+
+    if not admin_ids:
+        await update.message.reply_text("No admins configured for this room.")
+        return
+
+    lines = [f"Room Admins:"]
+    for admin_id in admin_ids:
+        lines.append(f"- @{admin_id}")
+
+    await update.message.reply_text("\n".join(lines))