Code-review followups on 16d4399:
- CLAUDE.md's "When CSS changes don't appear" diagnostic steps
were written for the old per-request token. Under mtime-based
caching, a stable ?v= number is the healthy expected state,
not a broken one. Rewrote steps 1 + 3 so someone debugging
a real production CSS issue gets the right advice.
- Dropped unused `original = cp._compute_cache_bust_token` line
in test_token_falls_back_if_file_missing - it misled readers
into thinking the function itself was patched. Added a one-
line comment clarifying the monkey-patch is path-only.
Tests: still 68/68.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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