Add CLI test coverage (cli.py has zero tests)

[roeimichael]

Problem

cli.py is the largest file in the project at 1105 lines and has zero test coverage. The install and uninstall commands modify Claude Code's settings.json. The status, anomalies, health commands all have logic that could break silently. New contributors modifying CLI behavior have no regression safety net.

What to do

Create tests/test_cli.py with at least:

1. install command — verify hooks are written to the correct location
2. uninstall command — verify hook entries are removed from settings.json
3. status command — with mocked HTTP responses
4. health command — with mocked HTTP responses
5. config show (if implemented) — verify output includes all config sections

Recommended approach

• Use typer.testing.CliRunner for invoking commands
• Use tmp_path fixtures for filesystem operations
• Use respx or unittest.mock.patch to mock httpx calls to the collector

Files to look at

• src/context_analyzer_tool/cli.py — the module under test
• tests/test_config.py — good example of how existing tests are structured