Show and tweak approved community effect params during generation

[smcga]

Motivation

• Surface tweakable parameter controls for approved community effects while the generator is busy so users can fiddle with previews and keep the UX tight and focused.

Description

• Added a compact control surface to the generation busy overlay (index.html) that shows the currently previewed approved effect name and inline param controls.
• Introduced renderEffectIdeaParamControls and renderBusyCommunityEffectControls in src/main.ts, refactored the generated-effect controls to reuse the shared renderer, and wired carousel entries to carry both default values and paramDefs metadata.
• Kept busy-control visibility in sync with the generation lifecycle and applied the current carousel params to the live preview while generating.
• Added styling for the busy overlay controls in src/style.css and updated the README generator UX copy; updated src/style.test.ts to assert new markup/CSS expectations.

Testing

• Ran npm test -- src/style.test.ts and the style tests passed.
• Ran npm run build and the production build completed successfully.

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Codex Task

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Project	Deployment	Actions	Updated (UTC)
codexperimental	Ready	Preview, Comment	Apr 8, 2026 0:32am