fix(keysync): silence expected RLS rejections during best-effort backfill

apps/desktop/src/lib/conversationKeySync.ts

@@ -164,14 +164,25 @@ async function syncOneConversationGaps(ctx: SyncCtx, convId: string): Promise<vo
     try {
       await shareConvKeyToDevice(supabase, convId, dev.id, pgHexToBytes(dev.public_key), ownCtx);
     } catch (err: unknown) {
-      // Most common: this device hasn't been wrapped for us yet either, so
-      // tryGetConvKey couldn't unwrap. Another peer with the key will fill
-      // the gap when they hit syncAllExistingGaps.
-      console.warn('keySync: shareConvKeyToDevice gap-fill failed', {
-        convId,
-        recipient: dev.id,
-        err,
-      });
+      // Backfill is best-effort. Common silent failures:
+      //   - This device hasn't been wrapped for us yet either, so
+      //     tryGetConvKey couldn't unwrap (another peer will fill the gap).
+      //   - RLS rejects because the recipient's owner is a pending (not-yet
+      //     accepted) DM member, or has been removed from the conv.
+      // Any of these are recoverable — log only at debug level.
+      const msg = err instanceof Error ? err.message : String(err);
+      const isExpected =
+        msg.includes('does not have it yet') ||
+        msg.includes('row-level security') ||
+        msg.includes('403') ||
+        msg.includes('Forbidden');
+      if (!isExpected) {
+        console.warn('keySync: shareConvKeyToDevice gap-fill failed', {
+          convId,
+          recipient: dev.id,
+          err,
+        });
+      }
     }
   }
 }