feat(backend,frontend,mcp): any voice or round video can be transcribed on request, media is found by its bytes

backend/src/api/routers/media.py

@@ -8,17 +8,19 @@ from fastapi.responses import FileResponse
 from utils.cache import DAY_HEADERS, IMMUTABLE_HEADERS
 from utils.files import content_disposition, media_file_name, resolve_mime
 from utils.read.media import (
+    find_by_content,
     get_media,
     get_media_version,
     get_media_versions,
     get_message_media,
 )
-from utils.read.models import MediaVersionView, MediaView
+from utils.read.models import MediaPlaceView, MediaVersionView, MediaView
 from utils.storage import ContentAddressedStorage
 
 router = APIRouter(prefix="/api/media", tags=["media"], route_class=DishkaRoute)
 
 Download = Annotated[bool, Query()]
+Sha256 = Annotated[str, Query(pattern="^[0-9a-f]{64}$")]
 
 
 def _attachment(headers: dict[str, str], file_name: str) -> dict[str, str]:
@@ -81,6 +83,15 @@ async def message_media(
     return media
 
 
+@router.get("/lookup")
+async def lookup_media(
+    pool: FromDishka[asyncpg.Pool],
+    sha256: Sha256,
+    account_id: Annotated[int | None, Query()] = None,
+) -> list[MediaPlaceView]:
+    return await find_by_content(pool, sha256, account_id)
+
+
 @router.get("/{media_id}")
 async def serve_media(
     pool: FromDishka[asyncpg.Pool],