Add watchlist download-all action

app.py

@@ -1740,6 +1740,47 @@ def update_watchlist_status(show_id, _mode=None):
     return {"message": f"Queued refresh for {item['title']}.", "item": item}
 
 
+def download_watchlist_item(show_id, mode):
+    runtime = ensure_runtime()
+    item = runtime["watchlist"].get(show_id)
+    normalized_mode = str(mode or "").strip().lower()
+    if normalized_mode not in MODE_CHOICES:
+        raise ValueError("Mode must be sub or dub")
+
+    query = str(item.get("title") or item.get("show_id") or "").strip()
+    if not query:
+        raise ValueError("Watchlist item is missing a searchable title.")
+
+    results = search_anime(query, normalized_mode)
+    match = next((candidate for candidate in results if str(candidate.get("id") or "").strip() == item["show_id"]), None)
+    if match is None:
+        raise ValueError(f"Could not match {item['title']} in {normalized_mode} search results.")
+
+    episodes = episode_list(item["show_id"], normalized_mode)
+    if not episodes:
+        raise ValueError(f"No {normalized_mode} episodes are currently available for {item['title']}.")
+    episode_spec = episodes[0] if len(episodes) == 1 else f"{episodes[0]}-{episodes[-1]}"
+
+    payload = {
+        "show_id": item["show_id"],
+        "query": match.get("query") or query,
+        "title": match.get("title") or item["title"],
+        "anime_name": item["title"],
+        "season": "1",
+        "index": match.get("index", 1),
+        "mode": normalized_mode,
+        "quality": runtime["config"]["quality"],
+        "episodes": episode_spec,
+        "download_dir": runtime["config"]["download_dir"],
+    }
+    job = runtime["download_queue"].add(payload)
+    return {
+        "message": f"Queued {item['title']} for {normalized_mode} download.",
+        "job": job,
+        "item": item,
+    }
+
+
 def update_watchlist_category(show_id, category):
     ensure_runtime()
     item = WATCHLIST.update_category(show_id, category)
@@ -1968,6 +2009,7 @@ Handler = build_handler_class(
     HandlerContext(
         add_to_watchlist=add_to_watchlist,
         config_html=CONFIG_HTML,
+        download_watchlist_item=download_watchlist_item,
         ensure_runtime=ensure_runtime,
         episode_list=episode_list,
         get_config_snapshot=get_config_snapshot,