feat(settings): persist discoveryExploreBaseline in USER_PREFS (Phase 138)

Store the public discovery listing count from when Explore was last opened
so multi-device clients can compute discoveryNewSinceExplore after
USER_PREFS_UPDATE mesh sync (v0.8.103).

Co-authored-by: Cursor <[email protected]>

README.md

@@ -14,6 +14,7 @@ P2P user appearance and UX preferences for Pearcord. Syncs across devices on `pe
 | `composeDrafts` | `{ [channelId]: { text } }` | `{}` |
 | `companionLastGuildId` | guild id or `null` | `null` — last server opened (desktop + companion); P2P sync via USER_PREFS |
 | `guildPresenceCache` | `{ [guildId]: { online, at } }` | `{}` — companion rail presence; synced on settings mesh (v0.8.95) |
+| `discoveryExploreBaseline` | number or `null` | `null` — public listing count when Explore last opened (v0.8.103) |
 
 ## API
 

index.js

@@ -29,7 +29,9 @@ const DEFAULT_USER_PREFS = {
   /** @type {Record<string, { online: number, at: number }>} */
   guildPresenceCache: {},
   /** Thread channel ids pinned in Active Threads panel (v0.8.99). */
-  pinnedThreadIds: []
+  pinnedThreadIds: [],
+  /** Public discovery listing count when Explore was last opened (v0.8.103). */
+  discoveryExploreBaseline: null
 }
 
 class PearcordSettings extends EventEmitter {
@@ -80,6 +82,11 @@ class PearcordSettings extends EventEmitter {
         ? f
         : DEFAULT_USER_PREFS.auditLogExportFilter
     }
+    if (patch.discoveryExploreBaseline !== undefined) {
+      const n = patch.discoveryExploreBaseline
+      prefs.discoveryExploreBaseline =
+        n == null || n === '' ? null : Math.max(0, Math.floor(Number(n) || 0))
+    }
     const updatedAt = now()
     await this.store.insert(PREFS_COLLECTION, {
       userId: this.userId,