feat(web): improve message UX, voice gestures, and attachments

app/media/service.py

@@ -10,7 +10,8 @@ from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.config.settings import settings
 from app.media import repository
-from app.media.schemas import AttachmentCreateRequest, AttachmentRead, UploadUrlRequest, UploadUrlResponse
+from app.media.schemas import AttachmentCreateRequest, AttachmentRead, ChatAttachmentRead, UploadUrlRequest, UploadUrlResponse
+from app.chats.service import ensure_chat_membership
 from app.messages.repository import get_message_by_id
 
 ALLOWED_MIME_TYPES = {
@@ -134,3 +135,32 @@ async def store_attachment_metadata(
     await db.commit()
     await db.refresh(attachment)
     return AttachmentRead.model_validate(attachment)
+
+
+async def list_attachments_for_chat(
+    db: AsyncSession,
+    *,
+    user_id: int,
+    chat_id: int,
+    limit: int = 100,
+    before_id: int | None = None,
+) -> list[ChatAttachmentRead]:
+    await ensure_chat_membership(db, chat_id=chat_id, user_id=user_id)
+    rows = await repository.list_chat_attachments(
+        db,
+        chat_id=chat_id,
+        limit=max(1, min(limit, 200)),
+        before_id=before_id,
+    )
+    return [
+        ChatAttachmentRead(
+            id=attachment.id,
+            message_id=attachment.message_id,
+            sender_id=message.sender_id,
+            message_created_at=message.created_at,
+            file_url=attachment.file_url,
+            file_type=attachment.file_type,
+            file_size=attachment.file_size,
+        )
+        for attachment, message in rows
+    ]