Bug Fix
Fixed generated install.bat files failing on fresh installs due to PowerShell multi-line command parsing.
Root cause: The ^ (caret) line continuation characters were placed inside double-quoted strings in both templates/install.bat.template and core/package_generator.py. CMD treats ^ inside quotes as a literal character rather than a line continuation, so it was passed directly to PowerShell which doesn't recognize ^ as a valid token.
This affected all generated packages — any package with tkinter, Git, or FFmpeg support would fail on first run. The deployer's own install.bat was not affected.
Fix: Close the double quotes before each ^ so CMD correctly treats them as line continuations. Packages previously generated with v1.0.0 need to be regenerated.