True thin-client / lazy sync

Big fan, heavy user here. I need a way to keep my full history in the cloud while only loading what I open locally.

Current pain

• After a wipe, local IndexedDB quickly grows back to ~500–650 MB and the app gets sluggish/freezy.

• Some image-heavy threads are excluded by the per-chat size cap.

• Full exports sometimes crash (“Aw, Snap!”).

What I’ve tried

• Wiped local cache (IndexedDB) via DevTools; in-app “Delete all local data” has crashed before.

• Optimize rendering ON, 25 msgs/page, auto-archive ON, auto-delete OFF.

• Split mega threads, trimmed attachments, exported in smaller batches.

Ask

• A lazy/partial sync mode: don’t rehydrate everything; fetch folders/chats on open, attachments on demand.

• Option for cloud-only archive (visible/searchable, not loaded until opened).

• Guidance on the best setup today to keep local tiny without losing history (e.g., text-only sync for older chats?).

Cloud Sync is great for backup, but it rehydrates too much locally—so it isn’t solving performance for big libraries. I’d gladly pay for a plan that delivers true thin-client behavior. (Also, would love to hear any recommendations to deal with this issue)