fix: rclone PC-to-PC sync — serve backups, chat-history, uploads via filters; save source before Sync Now

The WebDAV server was narrowed to serve only backups/ (to stop exposing
.env), but the receiver still pulls /backups, /chat-history and /uploads,
so every sync failed with "directory not found". Serve the app root
filtered with --include to just those three folders; everything else
(.env, source, config/key files) returns 404.

Sync Now now saves the typed source IP/port before pulling, since the
pull reads the saved config.

stop-app.sh also frees port 8080: kill -9 on the backend orphans the
rclone child, which then keeps the port with stale settings.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/Frontend/src/components/database-management/network-backup-manager.tsx

@@ -142,6 +142,14 @@ function RcloneBackupSection() {
 
   const pullNowMutation = useMutation({
     mutationFn: async () => {
+      // The pull reads the saved config, so persist the source typed in the
+      // form first — otherwise Sync Now fails until "Save" is clicked.
+      const saveRes = await apiRequest("PUT", "/api/database-management/rclone-config", {
+        sourceIp,
+        sourcePort,
+      });
+      if (!saveRes.ok) throw new Error("Failed to save source PC settings");
+
       const res = await apiRequest("POST", "/api/database-management/rclone-pull-now");
       if (!res.ok) {
         const body = await res.json();