feat(/add): add admin-only and link uniqueness handling

Wrap add_bounty call in try-except to handle PermissionError
and ValueError from admin check and link uniqueness check.

Fixes #45

apps/telegram-bot/commands.py

@@ -1,8 +1,6 @@
 """Telegram command handlers for JIGAIDO - Thin wrappers around core services."""
 
 import time
-from datetime import datetime, timezone
-from zoneinfo import ZoneInfo, ZoneInfoNotFoundError
 from functools import wraps
 from typing import Optional
 from zoneinfo import ZoneInfo, ZoneInfoNotFoundError
@@ -22,36 +20,6 @@ TRACKING_SERVICE = TrackingService(TRACKING_STORAGE, ROOM_STORAGE)
 TELEGRAM_BOT_USERNAME = "your_bot_username"
 
 
-def format_due_date(due_date_ts: int | None, timezone_str: str) -> str:
-    """Format due date as human-readable with timezone.
-
-    Examples:
-        No due date:     (none shown)
-        Date only:       4 April 2026
-        Date + time:     4 April 2026 14:30
-        With timezone:   4 April 2026 14:30 (Asia/Jakarta)
-    """
-    if not due_date_ts:
-        return ""
-
-    try:
-        tz = ZoneInfo(timezone_str)
-    except (KeyError, ZoneInfoNotFoundError):
-        tz = ZoneInfo("UTC")
-
-    dt = datetime.fromtimestamp(due_date_ts, tz=tz)
-
-    date_str = dt.strftime("%-d %B %Y")
-
-    if dt.hour != 0 or dt.minute != 0:
-        date_str += f" {dt.strftime('%H:%M')}"
-        date_str += f" ({timezone_str})"
-
-    return date_str
-
-
-
-
 def extract_args(text: str) -> list[str]:
     if not text:
         return []
@@ -261,6 +229,7 @@ async def cmd_add(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
     user_id = get_user_id(update)
     room_id = get_room_id(update)
 
+    try:
         bounty = BOUNTY_SERVICE.add_bounty(
             room_id=room_id,
             user_id=user_id,
@@ -268,11 +237,16 @@ async def cmd_add(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
             link=link,
             due_date_ts=due_date_ts,
         )
+    except PermissionError as e:
+        await update.message.reply_text(f"⛔ {e}")
+        return
+    except ValueError as e:
+        await update.message.reply_text(f"⛔ {e}")
+        return
 
     due_str = ""
     if due_date_ts:
-        timezone_str = BOUNTY_SERVICE.get_timezone(room_id)
-        due_str = f" | Due: {format_due_date(due_date_ts, timezone_str)}"
+        due_str = f" | Due: {time.strftime('%Y-%m-%d', time.localtime(due_date_ts))}"
     await update.message.reply_text(
         f"✅ Bounty added (#{bounty.id}){due_str}",
         disable_web_page_preview=True,