Remove dead stub files from src/silentguard/

[TheZupZup]

Overview

Several files in src/silentguard/ exist but contain no working code. They are not imported anywhere in the application and can mislead contributors trying to understand the codebase.

Note: blocked_view.py is no longer listed here. It was converted into a short documentation shim after the TUI Rules view was implemented in #40.

File	Content	Problem
rules.py	Only comments and TODOs	All rules logic currently lives in monitor.py
actions.py	Placeholder functions / dead action planning	Real block/unblock helpers live in monitor.py; TUI actions live in tui.py
ui.py	Empty or unused UI placeholder	Both UIs are implemented in main.py and tui.py

Additionally, pyproject.toml.save is an outdated backup file that serves no purpose in the repo.

What needs to be done

• Verify none of these files are imported anywhere: grep -r "rules\|actions\|from silentguard.ui" src/
• Delete src/silentguard/rules.py
• Delete src/silentguard/actions.py
• Delete src/silentguard/ui.py
• Delete pyproject.toml.save
• Run the app and tests after deletion to confirm nothing broke

Goal

The src/silentguard/ directory contains only files with real working code or intentional documentation shims. A new contributor reading the source should immediately understand what each file does.

Notes

If any of these files are needed for future features, they should be created fresh when that feature is started — not kept as empty placeholders that confuse the module structure.