Expanded regenerate functionality on Mobile

Feature request (Mobile): Regenerate from any earlier point + prune the branch

Please add full-thread regeneration branching to the mobile app, matching the browser experience.

Right now, regeneration on mobile is effectively limited to the most recent assistant response. That blocks a common workflow: when a conversation drifts into an unwanted direction, I want to jump back to an earlier “fork in the road,” regenerate at that earlier message, and continue from there.

What I want on mobile:

• A Regenerate option on any assistant response in the thread (not just the latest).

• When I regenerate at an earlier point, everything after that point disappears (assistant replies and my subsequent prompts), and the thread continues from the regeneration point as the new timeline.

Why this matters:

• Without this, “resetting” a thread means manually redoing the conversation one message at a time, which is brutally tedious.

• The current delete option for an older response only removes that single assistant message, while the rest of the thread (including my prompts) remains, creating a messy sequence that doesn’t function as a clean restart.

In short: mobile needs true “regenerate from here” with automatic pruning of the rest of the conversation.