The stub generator emits net-new types as base-LESS partials, so generated Vfx/View
types weren't actually VfxBase/etc. -> hundreds of CS1503/CS0029 'cannot convert to
VfxBase' at every polymorphic call site. m1_baseclauses.py recovers each generated
type's decomp base CLASS (interfaces dropped to avoid CS0535) into _BaseClauses.g.cs,
cross-namespace bases fully qualified. Generated the intermediate Vfx/processing base
types (SpreadOutVfx/OpenCardVfx/ProcessingBase/DamageVfxBase/ForecastIconVfxBase/...).
DefaultOpeningVfx regenerated WITH override (its base OpeningVfx is copied+abstract).
Clearing the polymorphism cascade + the masking base-type CS0246s unmasked the true
member-level frontier: 2202 (CS1501/CS1061/CS1503), 0 structural errors.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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