fix: /edit command improvements

1. Accept any URL-like string as link (not just http/https)
   - Now detects URLs by pattern: contains "." and "/" (e.g., github.com/foo)

2. Show old -> new changes in update response
   - Now shows exactly what changed for verification
   - Helps user catch mistakes immediately

apps/telegram-bot/commands.py

@@ -66,14 +66,19 @@ def parse_args(
     clear_link = False
     clear_date = False
 
+    def is_url(s: str) -> bool:
+        if not s:
+            return False
+        if s.startswith("http://") or s.startswith("https://"):
+            return True
+        return "." in s and "/" in s
+
     i = 0
     while i < len(args):
         arg = args[i]
 
         if arg == "-link":
-            if i + 1 < len(args) and (
+            if i + 1 < len(args) and is_url(args[i + 1]):
-                args[i + 1].startswith("http://") or args[i + 1].startswith("https://")
-            ):
                 link = args[i + 1]
                 i += 2
             else:
@@ -91,7 +96,7 @@ def parse_args(
             else:
                 clear_date = True
                 i += 1
-        elif not link and (arg.startswith("http://") or arg.startswith("https://")):
+        elif not link and is_url(arg):
             link = arg
             i += 1
         elif due_date_ts is None:
@@ -365,6 +370,11 @@ async def cmd_update(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
     user_id = get_user_id(update)
     room_id = get_room_id(update)
 
+    old_bounty = BOUNTY_SERVICE.get_bounty(room_id, bounty_id)
+    if not old_bounty:
+        await update.message.reply_text("Bounty not found.")
+        return
+
     try:
         success = BOUNTY_SERVICE.update_bounty(
             room_id=room_id,
@@ -384,6 +394,37 @@ async def cmd_update(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
         return
 
     if success:
+        changes = []
+        if text is not None:
+            old_text = old_bounty.text or "(none)"
+            changes.append(f"Text: {old_text} → {text}")
+        if link is not None:
+            old_link = old_bounty.link or "(none)"
+            changes.append(f"Link: {old_link} → {link}")
+        if due_date_ts is not None:
+            old_date = (
+                time.strftime("%d %b %Y", time.localtime(old_bounty.due_date_ts))
+                if old_bounty.due_date_ts
+                else "(none)"
+            )
+            new_date = time.strftime("%d %b %Y", time.localtime(due_date_ts))
+            changes.append(f"Date: {old_date} → {new_date}")
+        if clear_link:
+            old_link = old_bounty.link or "(none)"
+            changes.append(f"Link: {old_link} → (cleared)")
+        if clear_date:
+            old_date = (
+                time.strftime("%d %b %Y", time.localtime(old_bounty.due_date_ts))
+                if old_bounty.due_date_ts
+                else "(none)"
+            )
+            changes.append(f"Date: {old_date} → (cleared)")
+
+        if changes:
+            await update.message.reply_text(
+                f"✅ Bounty #{bounty_id} updated:\n" + "\n".join(changes)
+            )
+        else:
             await update.message.reply_text(f"✅ Bounty #{bounty_id} updated.")
     else:
         await update.message.reply_text("Bounty not found.")