install.sh fails silently when system Python is < 3.10 (error swallowed by Swift build warnings)

[OMauriStkOne]

Problem

On a fresh macOS install where the only python3 on PATH is the system Python (3.9.6 on macOS 14/15), install.sh exits with status 1 immediately after printing Setting up voice engine... with no obvious indication of what went wrong.

The installer does print a helpful message (install.sh:56-57):

Could not find Python ≥ 3.10. Install one (e.g. brew install python@3.13) or set STACKNUDGE_PYTHON=/path/to/python3 and re-run.

…but on macOS that message is buried under ~120 lines of NSUserNotification Swift deprecation warnings emitted during the build/stack-nudge.app step. Anyone scrolling the install output (or using tail) misses the actionable line entirely and just sees a non-zero exit.

Repro

1. macOS with no Homebrew Python and no pyenv (only /usr/bin/python3 → 3.9.6).
2. git clone and ./install.sh.
3. Build succeeds, app bundles install, then exits 1 after Setting up voice engine....

Suggested fixes

• Silence or filter the Swift deprecation warnings during build.sh (e.g. -suppress-warnings or redirect to a log) so install output stays scannable.
• Make the "no Python ≥ 3.10" message louder — e.g. blank lines around it, a ❌ marker, or print it again at the very end before exit 1.
• Optionally: detect Homebrew and offer to run brew install python@3.13 automatically (with a yes/no prompt).
• Bonus: docs note in README install section that Python ≥ 3.10 is a prerequisite.

Environment

• macOS Darwin 25.3.0
• /usr/bin/python3 → Python 3.9.6
• Homebrew 5.1.8 installed but no python@3.x formula
• No pyenv