[dasarisandeepreddy8658]

What does this PR do?

• Limits simultaneous speakers to a maximum of three.
• Prevents hosts from promoting additional speakers when the limit is reached.
• Adds a host-only Mute All endpoint and button.
• Displays the current speaker count in the live stage.
• Adds tests for speaker limits and Mute All permissions.

Related issue

Closes #204

Type of change

• Bug fix
• New feature
• Documentation
• Refactoring
• Performance
• Tests
• Build / CI / deployment

Which services does this touch?

• apps/frontend
• apps/http-server
• apps/ws-server
• apps/genAI
• 'apps/streaming'
• packages/db (schema or Prisma changes)
• Docker / CI

How did you test this?

• Frontend tests: pnpm.cmd --filter frontend test — 84 tests passed.
• Streaming tests: pnpm.cmd --filter streaming test — 37 tests passed.
• Frontend type check: pnpm.cmd --filter frontend check-types — passed.
• Frontend build: pnpm.cmd --filter frontend build — passed.
• Streaming build: pnpm.cmd --filter streaming build — passed.

Checklist

• I ran pnpm run lint
• I ran pnpm run check-types
• I ran pnpm run build
• The app still starts with docker-compose up
• I updated documentation if this changes behaviour or setup
• I did not commit any .env file, API key or other secret

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First pull request here? CONTRIBUTING.md walks through the
whole process, and a checkbox left unticked is not a problem — say so and we
will help.