v0.4.3

Changes

• Fix installer backend startup (resource path mismatch)
• Fix terminal session switch glitches (columns collapse, double input)
• Middle mouse button click scrolls terminal to bottom
• Git panel: sub-repo selector (discover git repos under workPath)
• Fix "Not a git repository" flash on panel open
• NSIS installer hooks: kill backend before install/uninstall
• Release workflow: manual dispatch + tauri-cli install
• Desktop ping timeout 20s