Covers _validate_pin_key (all groups + negatives), _apply_pins_to_raw
(fonts list/tuple/typeerror, multi-pin, no-mutation, unknown-key guard),
and generate_profile (determinism, seed coercion, pin propagation through
to_prefs_dict, frozen-instance, dark_theme bool coercion, fonts list
roundtrip, int31 boundary). Includes a guard test that every dotted pin
key has a _PIN_TO_RAW mapping.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Covers classify_gpu (decision-table over 28 GPU strings inc. boundary
values for AMD Radeon number ranges), _screen_tier resolution
classification, derive_font_prefs / derive_font_whitelist coherence and
determinism, and the public Forge / sample entry points (locked
identity, key set, type correctness, seed determinism).
One plan deviation: the original plan claimed `AMD FirePro W7100` →
`workstation`, but the workstation regex requires a `Radeon` prefix,
so FirePro alone falls through to the `mid_range` fallback. Test
asserts the actual behaviour.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>