feat(platform): persist discoveryExploreFilter in USER_PREFS

Phase 146 (v0.8.111): setDiscoveryFilter is async and saves query,
sort, minMembers, and tag to discoveryExploreFilter prefs. Restore
on boot via _ingestDiscoveryExploreBaselineFromPrefs. Emits discovery
after filter updates.

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

README.md

@@ -60,6 +60,7 @@ Expose a single `EventEmitter` API the UI drives over IPC (`apps/pearcord/index.
 |--------|------|
 | `joinVoice`, `leaveVoice`, `setVoiceMute` | `pearcord-voice` + guild gossip |
 | `setVoiceRosterChannelExpanded(channelId, expanded)` | USER_PREFS `voiceRosterExpandedChannelIds` (v0.8.110) |
+| `setDiscoveryFilter({ query, sort, minMembers, tag })` | Persists `discoveryExploreFilter` in USER_PREFS (v0.8.111) |
 | Voice/s screen share ingest | `VoiceMediaHub`, `ScreenShareHub` wired in `_openGuild` |
 
 ### Views & companion

index.js

@@ -1181,7 +1181,7 @@ class PearcordPlatform extends EventEmitter {
     return []
   }
 
-  setDiscoveryFilter ({ query, sort, minMembers, tag }) {
+  async setDiscoveryFilter ({ query, sort, minMembers, tag }) {
     if (query !== undefined) this._discoveryFilter.query = String(query || '').trim()
     if (sort === 'members' || sort === 'name' || sort === 'newest') {
       this._discoveryFilter.sort = sort
@@ -1192,7 +1192,13 @@ class PearcordPlatform extends EventEmitter {
     if (tag !== undefined) {
       this._discoveryFilter.tag = String(tag || '').trim().toLowerCase()
     }
+    if (this.userSettings) {
+      await this.updateUserPrefs({
+        discoveryExploreFilter: { ...this._discoveryFilter }
+      })
+    }
     this.refreshDiscoveryListingsFromMesh().catch(() => {})
+    this.emit('discovery')
     return { ...this._discoveryFilter }
   }
 
@@ -1261,6 +1267,21 @@ class PearcordPlatform extends EventEmitter {
         prefs.voiceRosterExpandedChannelIds.map((id) => String(id)).filter(Boolean)
       )
     }
+    const df = prefs.discoveryExploreFilter
+    if (df && typeof df === 'object') {
+      if (df.query !== undefined) {
+        this._discoveryFilter.query = String(df.query || '').trim()
+      }
+      if (df.sort === 'members' || df.sort === 'name' || df.sort === 'newest') {
+        this._discoveryFilter.sort = df.sort
+      }
+      if (df.minMembers !== undefined) {
+        this._discoveryFilter.minMembers = Math.max(0, Number(df.minMembers) || 0)
+      }
+      if (df.tag !== undefined) {
+        this._discoveryFilter.tag = String(df.tag || '').trim().toLowerCase()
+      }
+    }
   }
 
   async setVoiceRosterChannelExpanded (channelId, expanded) {