chore: delete dead platforms.py and fix seed_campaigns mutation bug

app/services/platforms.py

@@ -1,37 +0,0 @@
-"""
-Platform registry: maps platform names to their poster implementations.
-
-Adding a new platform:
-  1. Create app/services/<platform>/client.py implementing PlatformClient
-  2. Register it here in REGISTRY
-
-This keeps poster.py platform-agnostic — it looks up the right client by
-the campaign's `platform` field rather than branching on strings everywhere.
-"""
-from __future__ import annotations
-
-from typing import Protocol
-
-
-class PlatformClient(Protocol):
-    def post(self, target: str, title: str, body: str, flair: str | None = None) -> str:
-        """Post content to a target (sub, group, channel). Returns a URL."""
-        ...
-
-
-def get_client(platform: str) -> PlatformClient:
-    """Return an initialized client for the given platform name."""
-    if platform == "reddit":
-        from app.services.reddit.client import RedditClient
-        return RedditClient()
-    raise NotImplementedError(
-        f"Platform '{platform}' is not yet implemented. "
-        f"Add a client in app/services/{platform}/ and register it here."
-    )
-
-
-# Platforms with posting support implemented
-SUPPORTED_PLATFORMS = {"reddit"}
-
-# Platforms planned but not yet implemented
-PLANNED_PLATFORMS = {"facebook", "discord", "lemmy", "mastodon"}

scripts/seed_campaigns.py

@@ -412,8 +412,9 @@ def seed(store: Store) -> None:
     print()
     print("Seeding sub rules...")
     for rule in SUB_RULES:
-        sub = rule.pop("sub")
-        store.upsert_sub_rules(sub=sub, last_checked="2026-04-21", **rule)
+        sub = rule["sub"]
+        fields = {k: v for k, v in rule.items() if k != "sub"}
+        store.upsert_sub_rules(sub=sub, last_checked="2026-04-21", **fields)
         allowed = "OK" if rule.get("promo_allowed") else "BANNED"
         print(f"  r/{sub}: {allowed}")