feat: add hardcoded bot pubkey filtering

src/config/bots.ts

@@ -0,0 +1,17 @@
+import { nip19 } from 'nostr-tools'
+
+/**
+ * Hardcoded list of bot pubkeys (hex format) to hide articles from
+ * These are accounts known to be bots or automated services
+ */
+export const BOT_PUBKEYS = new Set([
+  // Step Counter Bot (npub14l5xklll5vxzrf6hfkv8m6n2gqevythn5pqc6ezluespah0e8ars4279ss)
+  nip19.decode('npub14l5xklll5vxzrf6hfkv8m6n2gqevythn5pqc6ezluespah0e8ars4279ss').data as string,
+])
+
+/**
+ * Check if a pubkey corresponds to a known bot
+ */
+export function isKnownBot(pubkey: string): boolean {
+  return BOT_PUBKEYS.has(pubkey)
+}