Uncommitted Changes UI

What: Interactive dialog when switching branches with uncommitted or unpushed changes

How to trigger:

# Automatically appears when switching branches with uncommitted work
claude  # then use teleport feature

Details:

• Shows different warnings for uncommitted changes vs unpushed commits
• Provides three options: Continue without committing, Commit and push changes, Cancel operation
• Prevents data loss during branch switches
• Evidence: uT2() at line 428379 in pretty-v2.0.41.js (replaces unrelated function at line 428358 in v2.0.37)