feat(studio): add first-wave React operator UI

[YashasVM]

Summary

• add four-route React operator console for Dashboard, Cameras, Audio, and Studio
• introduce typed StudioAdapter and deterministic revisioned simulator with explicit command outcomes
• model capability-driven camera controls, explicit phone Program audio, and Program frame-hold failure behavior
• add keyboard navigation, screen-reader status, reduced-motion, responsive scaling, and focused tests

Boundaries

• no backend media, engine IPC, OBS integration, network, or disk implementation
• UI owns only views and operator commands

Verification

• bun run typecheck
• bun run lint
• bun run test (10 tests)
• bun run build
• in-app browser wide-layout and console-health smoke test

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 9a3a6ec7-9ae8-46c9-bee1-32c0e4487550

📥 Commits

Reviewing files that changed from the base of the PR and between 6c65476 and 5dce153.

⛔ Files ignored due to path filters (1)

• desktop/bun.lock is excluded by !**/*.lock

📒 Files selected for processing (20)

• desktop/.gitignore
• desktop/eslint.config.js
• desktop/index.html
• desktop/package.json
• desktop/src/App.test.tsx
• desktop/src/App.tsx
• desktop/src/components.tsx
• desktop/src/index.css
• desktop/src/main.tsx
• desktop/src/pages.tsx
• desktop/src/studio/context.tsx
• desktop/src/studio/safety.test.ts
• desktop/src/studio/simulator.test.ts
• desktop/src/studio/simulator.ts
• desktop/src/studio/types.ts
• desktop/src/test/setup.ts
• desktop/tsconfig.app.json
• desktop/tsconfig.json
• desktop/tsconfig.node.json
• desktop/vite.config.ts

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