feat(userbot,api,frontend): backfill stories and unbreak all-stories list

backend/src/userbot/modules/stories/repository.py

@@ -22,6 +22,20 @@ ON CONFLICT (account_id, peer_id, story_id) DO UPDATE SET
 """
 
 
+async def is_downloaded(
+    pool: asyncpg.Pool, account_id: int, peer_id: int, story_id: int
+) -> bool:
+    return bool(
+        await pool.fetchval(
+            "SELECT downloaded FROM stories "
+            "WHERE account_id = $1 AND peer_id = $2 AND story_id = $3",
+            account_id,
+            peer_id,
+            story_id,
+        )
+    )
+
+
 async def upsert_story(  # noqa: PLR0913
     pool: asyncpg.Pool,
     account_id: int,

backend/src/userbot/modules/stories/service.py

@@ -0,0 +1,49 @@
+from io import BytesIO
+
+from pyrogram import Client
+from pyrogram.types import Story
+
+from userbot.modules.capture.context import CaptureContext
+from userbot.modules.stories import repository
+
+
+def story_peer_id(story: Story) -> int:
+    if story.chat is not None:
+        return story.chat.id or 0
+    if story.from_user is not None:
+        return story.from_user.id or 0
+    return 0
+
+
+async def save_story(client: Client, capture: CaptureContext, story: Story) -> None:
+    peer_id = story_peer_id(story)
+    storage_key: str | None = None
+    file_size: int | None = None
+    downloaded = False
+    stored = await repository.is_downloaded(
+        capture.pool, capture.account_id, peer_id, story.id
+    )
+    if not (stored or story.deleted or story.media is None):
+        buffer = await client.download_media(story, in_memory=True)
+        if isinstance(buffer, BytesIO):
+            data = buffer.getvalue()
+            storage_key = capture.storage.put(data)
+            file_size = len(data)
+            downloaded = True
+    await repository.upsert_story(
+        capture.pool,
+        capture.account_id,
+        peer_id,
+        story.id,
+        story.date,
+        story.expire_date,
+        story.caption,
+        story.media.name.lower() if story.media else None,
+        storage_key,
+        file_size,
+        story.views,
+        str(story.raw),
+        pinned=bool(story.pinned),
+        deleted=bool(story.deleted),
+        downloaded=downloaded,
+    )