feat(core,studio): the character presets pitch shift unlocks

[vanceingalls]

Summary

• Ships Chipmunk, Giant, and Monster as presets on the pitchshift worklet effect P1 added — pure data + copy, no new plumbing.
• Every param verified against the live effect registry (audioFx.ts) rather than trusted from the step doc's sketch — pitchshift/saturate/reverb/compressor/shelf keys all matched exactly.
• Per-preset title treatment (font, size, tracking, hue) for all three, satisfying the style-coverage, hue-distance-from-accent, and per-character-background-uniqueness tests.
• Complaint-line copy stays in the non-voice vocabulary the audit test enforces — giant, not a speech word like CapCut's "Deep Voice" (per the design doc's own near-miss).
• Updates plans/audio-fx-presets.md's two limits paragraphs to record that pitch shift landed and note Robot/Alien are still out (ring modulation, unbuilt).

Stack

Depends on and stacks on:

• feat(core): pitch shift — a granular shifter as the fifth FX worklet #3276 (P1 — pitchshift worklet effect)
• fix(core,studio): silence hidden audio in preview, and call it mute #3275 (A2 — audio mute)
• feat(studio): make presets the primary path into the FX rack #3274 (A1 — preset primary)

Should merge after all three.

Test plan

• bun run build clean
• packages/core full suite: 2344/2344 pass
• packages/core/src/audioFxCopy.test.ts (vocabulary audit): 28/28 pass
• packages/studio propertyPanelFxSection.test.tsx + propertyPanelFxPresetStyle.test.ts: 108/108 pass
• oxfmt/oxlint clean
• pre-commit hooks (lint/format/fallow/typecheck/commitlint) all green

🤖 Generated with Claude Code

[miga-heygen]

Review

Approve. Independent read at exact head.

Three character presets — chipmunk (+7st + high shelf sparkle), giant (-5st + low shelf weight + compressor glue), monster (-8st + tanh saturate growl + close reverb). Each builds a chain with the new pitchshift plus supporting FX, following the existing preset pattern exactly.

PRESET_PROBLEM strings, FX_PRESET_STYLE entries, and plans doc all updated. The plans doc honestly notes what's still out of scope (robot/alien need ring mod).

No issues. Ship it.

— Miga

[terencecho]

Independent read at head cd95622

Concurring with @miga-heygen's approve on the shared verification: three additive character presets, no existing preset touched, style + copy + plan updates in lockstep.

Additional checks I ran on top of that:

• Defense-in-depth on the pitch clamp. The three semitone values (7 / -5 / -8) sit inside both bounds: the effect registry (audioFx.ts min/max [-12, 12]) AND the worklet's own runtime clamp (Math.max(-12, Math.min(12, p.semitones ?? 0)) in the HfPitchshift processor from #3276). So even if a future spec-only widening let a param through, the worklet still caps it — musically comfortable + safe.
• Non-pitch params also in-range against audioFx.ts: highshelf freq 4000Hz / +3dB, lowshelf freq 150Hz / +4dB, compressor threshold -18dB / ratio 3, saturate tanh, reverb size 0.3 / wet 0.22. All within registered mins/maxes.
• Structural non-regression. The three new preset(...) calls are appended after doofus-worble and before the space block's room-tight. pa-system / intercom / doofus-worble (immediately before) and room-tight (immediately after) are byte-identical to prior. No sibling drift.
• No new plumbing — presets are pure data written into data-fx-chain. The "scoped gate" question reduces to "did the author touch anyone else's chain?" — they didn't.

CI: all required checks green; regression / player-perf / preview-regression all SUCCESS; no cascade gotchas triggered.

— Review by tai (pr-review)

The base branch was changed.