fix: call YouTube API directly, announce all matched results

YouTube InnerTube is a public API -- no need to route through SOCKS5
proxy, which was causing SSL EOF errors on every poll. Switch to
direct urllib.request.urlopen.

Remove _MAX_ANNOUNCE cap; all matched results are now announced
individually instead of truncating with "... and N more".

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/alert.py

@@ -20,7 +20,6 @@ _log = logging.getLogger(__name__)
 _NAME_RE = re.compile(r"^[a-z0-9][a-z0-9-]{0,19}$")
 _MAX_KEYWORD_LEN = 100
 _MAX_SEEN = 200
-_MAX_ANNOUNCE = 5
 _DEFAULT_INTERVAL = 300
 _MAX_INTERVAL = 3600
 _FETCH_TIMEOUT = 15
@@ -181,7 +180,7 @@ def _search_youtube(keyword: str) -> list[dict]:
     req = urllib.request.Request(_YT_SEARCH_URL, data=payload, method="POST")
     req.add_header("Content-Type", "application/json")
 
-    resp = _urlopen(req, timeout=_FETCH_TIMEOUT)
+    resp = urllib.request.urlopen(req, timeout=_FETCH_TIMEOUT)
     raw = resp.read()
     resp.close()
 
@@ -395,8 +394,7 @@ async def _poll_once(bot, key: str, announce: bool = True) -> None:
         if announce and matched:
             channel = data["channel"]
             name = data["name"]
-            shown = matched[:_MAX_ANNOUNCE]
-            for item in shown:
+            for item in matched:
                 title = _truncate(item["title"]) if item["title"] else "(no title)"
                 url = item["url"]
                 date = item.get("date", "")
@@ -407,9 +405,6 @@ async def _poll_once(bot, key: str, announce: bool = True) -> None:
                 if url:
                     line += f" -- {url}"
                 await bot.send(channel, line)
-            remaining = len(matched) - len(shown)
-            if remaining > 0:
-                await bot.send(channel, f"[{name}/{tag}] ... and {remaining} more")
 
         for item in new_items:
             seen_list.append(item["id"])