feat: implement /show command to display full bounty details

- Add cmd_show function to display bounty details including:
  - ID and full text (not sliced)
  - Link if exists
  - Due date formatted with room timezone
  - Created by username
  - Created at timestamp
- Register show command handler in bot.py
- Add show command to help text and bot command list
- Fixes #44

apps/telegram-bot/commands.py

@@ -401,6 +401,49 @@ async def cmd_start(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
         )
 
 
+async def cmd_show(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
+    args = extract_args(update.message.text)
+    if not args:
+        await update.message.reply_text("Usage: /show <bounty_id>")
+        return
+
+    try:
+        bounty_id = int(args[0])
+    except ValueError:
+        await update.message.reply_text("Invalid bounty ID.")
+        return
+
+    room_id = get_room_id(update)
+    bounty = BOUNTY_SERVICE.get_bounty(room_id, bounty_id)
+
+    if not bounty:
+        await update.message.reply_text("Bounty not found.")
+        return
+
+    timezone = BOUNTY_SERVICE.get_timezone(room_id)
+
+    lines = []
+
+    title = bounty.text or "(no text)"
+    lines.append(f"[#{bounty.id}] {title}")
+
+    due_parts = []
+    if bounty.due_date_ts:
+        due_str = time.strftime("%d %B %Y %H:%M", time.localtime(bounty.due_date_ts))
+        due_parts.append(f"Due: {due_str} ({timezone})")
+
+    username = bounty.created_by_username or f"user#{bounty.created_by_user_id}"
+    if bounty.link:
+        due_parts.append(f"{bounty.link} by @{username}")
+    else:
+        due_parts.append(f"by @{username}")
+
+    if due_parts:
+        lines.extend(due_parts)
+
+    await update.message.reply_text("\n".join(lines), disable_web_page_preview=True)
+
+
 async def cmd_help(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
     await update.message.reply_text(
         "👻 JIGAIDO Commands:\n\n"
@@ -415,6 +458,7 @@ async def cmd_help(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
         "/track <id> — track a bounty (groups only)\n"
         "/untrack <id> — stop tracking (groups only)\n"
         "/timezone [tz] — get/set room timezone (admin only)\n"
+        "/show <id> — show bounty details\n"
         "/start — re-initialize\n"
         "/help — this message",
         disable_web_page_preview=True,