feat(explore): feature the Homelab space instead of its individual rooms

Same swap as cinny (web): #homelabbing/#proxmox → their parent
#homelab:codestorm.net space, kept in sync since desktop copies this
config at build time.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

config.json

@@ -8,8 +8,8 @@
   "allowCustomHomeservers": true,
   "featuredCommunities": {
     "openAsDefault": false,
-    "spaces": ["!-1ZBnAH-JiCOV8MGSKN77zDGTuI3pgSdy8Unu_DrDyc"],
-    "rooms": ["#jellyfin:matrix.org", "#homelabbing:codestorm.net", "#proxmox:codestorm.net"],
+    "spaces": ["!-1ZBnAH-JiCOV8MGSKN77zDGTuI3pgSdy8Unu_DrDyc", "#homelab:codestorm.net"],
+    "rooms": ["#jellyfin:matrix.org"],
     "servers": ["matrixrooms.info"]
   },
   "hashRouter": {