feat: add calendar view with Bangumi.tv schedule integration

Add weekly broadcast schedule page showing subscribed anime grouped by
day-of-week. Backend fetches air_weekday from Bangumi.tv calendar API
and matches titles. Frontend displays responsive grid (desktop) and
vertical list (mobile). Edit popup moved to parent layout to fix
KeepAlive conflicts, and restyled with purple theme.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/src/module/manager/torrent.py

@@ -4,6 +4,7 @@ from module.database import Database
 from module.downloader import DownloadClient
 from module.models import Bangumi, BangumiUpdate, ResponseModel
 from module.parser import TitleParser
+from module.parser.analyser.bgm_calendar import fetch_bgm_calendar, match_weekday
 
 logger = logging.getLogger(__name__)
 
@@ -154,6 +155,37 @@ class TorrentManager(Database):
             msg_zh="刷新海报链接成功。",
         )
 
+    def refresh_calendar(self):
+        """Fetch Bangumi.tv calendar and update air_weekday for all bangumi."""
+        calendar_items = fetch_bgm_calendar()
+        if not calendar_items:
+            return ResponseModel(
+                status_code=500,
+                status=False,
+                msg_en="Failed to fetch calendar data from Bangumi.tv.",
+                msg_zh="从 Bangumi.tv 获取放送表失败。",
+            )
+        bangumis = self.bangumi.search_all()
+        updated = 0
+        for bangumi in bangumis:
+            if bangumi.deleted:
+                continue
+            weekday = match_weekday(
+                bangumi.official_title, bangumi.title_raw, calendar_items
+            )
+            if weekday is not None and weekday != bangumi.air_weekday:
+                bangumi.air_weekday = weekday
+                updated += 1
+        if updated > 0:
+            self.bangumi.update_all(bangumis)
+        logger.info(f"[Manager] Calendar refresh: updated {updated} bangumi.")
+        return ResponseModel(
+            status_code=200,
+            status=True,
+            msg_en=f"Calendar refreshed. Updated {updated} anime.",
+            msg_zh=f"放送表已刷新，更新了 {updated} 部番剧。",
+        )
+
     def search_all_bangumi(self):
         datas = self.bangumi.search_all()
         if not datas: