fix(platforms): ruff I001 — drop unused __future__ import; switch __init__ to per-module imports for clean isort ordering

backend/app/services/platforms/__init__.py

@@ -13,30 +13,27 @@ URL patterns match GS exactly so the existing browser extension
 hits FC unmodified.
 """
 
-from . import (
-    deviantart,
-    discord,
-    hentaifoundry,
-    patreon,
-    pixiv,
-    subscribestar,
-)
 from .base import (
     DEFAULT_DESCRIPTION_KEYS,
     DEFAULT_EXTERNAL_POST_ID_KEYS,
     PlatformInfo,
 )
-
+from .deviantart import INFO as _DEVIANTART
+from .discord import INFO as _DISCORD
+from .hentaifoundry import INFO as _HENTAIFOUNDRY
+from .patreon import INFO as _PATREON
+from .pixiv import INFO as _PIXIV
+from .subscribestar import INFO as _SUBSCRIBESTAR
 
 PLATFORMS: dict[str, PlatformInfo] = {
     info.key: info
     for info in (
-        patreon.INFO,
-        subscribestar.INFO,
-        hentaifoundry.INFO,
-        discord.INFO,
-        pixiv.INFO,
-        deviantart.INFO,
+        _PATREON,
+        _SUBSCRIBESTAR,
+        _HENTAIFOUNDRY,
+        _DISCORD,
+        _PIXIV,
+        _DEVIANTART,
     )
 }
 

backend/app/services/platforms/base.py

@@ -12,8 +12,6 @@ materialization, and the /api/platforms response pick it up
 automatically.
 """
 
-from __future__ import annotations
-
 from collections.abc import Callable
 from dataclasses import dataclass
 from typing import Literal