[Test Improver] fix(tests): strip ANSI escape sequences in _ascii_only helper (test_policy_status.py)

[danielmeppiel]

🤖 Test Improver — automated AI assistant

Problem

tests/unit/commands/test_policy_status.py::TestStatusFoundOutcome::test_renders_found_outcome and 6 sibling tests were failing with:

AssertionError: assert False
 where False = _ascii_only('\x1b[3m   APM Policy Status   \x1b[0m\n┏━━━...')
```

The `_ascii_only` helper returned `False` for any character whose `unicodedata.category` starts with `"C"` (control characters). This caught `\x1b` (U+001B, ESC), the opening byte of every ANSI CSI escape sequence Rich emits for italic/bold terminal styling — even when `NO_COLOR=1` is set in the environment (`NO_COLOR` suppresses colour codes but **not** all styling codes such as `\x1b[3m` italic or `\x1b[1m` bold).

## Approach

Strip CSI escape sequences (`\x1b[...letter`) from the rendered output **before** the character loop in `_ascii_only`.

The **intent** of the helper is to detect non-ASCII Unicode *content* characters we author (emojis, smart-quotes, unexpected symbols) that would violate the repo's cross-platform encoding rule. ANSI escape sequences are generated by Rich at render time, not authored in source strings — they are acceptable in terminal output and should not trigger the guard.

## Changes

- `tests/unit/commands/test_policy_status.py`: add `import re`; rewrite `_ascii_only` to strip CSI sequences before checking each character; update docstring.

## Test Status

| Suite | Before | After |
|---|---|---|
| `test_policy_status.py` | 33 pass / **7 fail** | **40 pass / 0 fail** |
| Full unit suite | 5476 pass / **1 fail (first hit)** | **5516 pass / 0 fail** |

```
uv run pytest tests/unit/commands/test_policy_status.py -q
# 40 passed in 0.41s

uv run pytest tests/unit tests/test_console.py -q
# 5516 passed, 1 warning, 26 subtests passed in 19.07s

Trade-offs

• The regex r"\x1b\[[0-9;]*[A-Za-z]" covers standard CSI sequences. Any non-CSI escape bytes still present after stripping (e.g. a stray bare \x1b) would be caught as a control character, preserving the safety net.
• Box-drawing-character allowlist in the function is unchanged.

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