Smarter Branch Handling and Keyword Automation

✨ New Features

• Automatically generates keywords for empty section branches (no more blank mini-map sections).
  Demo video
• Prevents deleting the active (speaking) branch, keeping it at the end for logical flow continuity.
  Before After Protection demo

🛠 Fixes

• Fixed version mismatch in updater: now verifies zip file version before returning a download link, preventing outdated update downloads.
• Fixed position of recording buttons on iPhone for better layout and quicker access.
  Screenshot
• Updated label from “Next Section” to “Next Topic” in recording interface (more accurate terminology).

And other improvements