Round 1 findings and fixes, all previously uncommitted:
- FXProcessor per-slot DSP history repair (HEAD does not compile without it)
- SynthVoice::getModulationValue, editor control-lock guard
- ExactCompare.h naming the deliberate exact float comparisons
- KnobLookAndFeel replacing the never-installed SerumLookAndFeel
- 55 first-party compiler warnings to 0
- AGENT.md renamed to AGENTS.md across Source/
- graft repository context graph and its hooks
- JANITOR_TASKS.md and UI_UX_AUDIT.md records
Replace the single shared array of 9 effect units with a 2D array
of kNumFxSlots × kNumEffectTypes, so each slot owns its own DSP
state. This prevents state bleed when the same effect type appears
in multiple slots and allows reordering without carrying over
internal history.
Track activeTypes to skip unchanged slots. Remove the dry buffer
since it was unused.
biggy