Harden source runtime recovery

[hideouts-io]

Summary

• constrain source installs to Python 3.10 through 3.13 for the pinned Qt runtime
• detect broken or drifted project environments and rebuild them transactionally
• validate imports, dependency consistency, and the bundled pymobiledevice3 entry point before launch
• document the supported runtime and cover its metadata boundary

Validation

• 95 tests passed
• all 49 guided command routes matched live help
• 90-button offscreen GUI smoke passed
• source launcher recovered from a removed Homebrew Python 3.13 interpreter by rebuilding with Python 3.11
• pip check, compileall, shell syntax, and diff checks passed