fix: preserve custom name/description on SupervisorAgent

[nuthalapativarun]

Issue Link (REQUIRED)

Fixes #254

Summary

Changes

SupervisorAgent unconditionally overwrote options.name and options.description with the lead agent's values, even when the caller supplied their own. Changed both Python and TypeScript implementations to use the caller-provided values and fall back to the lead agent's values only when none were given.

Python (python/src/agent_squad/agents/supervisor_agent.py):

# before
options.name = options.lead_agent.name
options.description = options.lead_agent.description

# after
options.name = options.name or options.lead_agent.name
options.description = options.description or options.lead_agent.description

TypeScript (typescript/src/agents/supervisorAgent.ts):

// before
super({ ...options, name: options.leadAgent.name, description: options.leadAgent.description });

// after
super({ ...options, name: options.name ?? options.leadAgent.name, description: options.description ?? options.leadAgent.description });

User experience

Before: passing name="My Supervisor" to SupervisorAgentOptions had no effect — the name was replaced by the lead agent's name.

After: user-supplied name/description are preserved; the lead agent's values are used only as defaults when none are provided.

Checklist

• I have performed a self-review of this change
• Changes have been tested
• Changes are documented
• I have linked this PR to an existing issue (required)

Acknowledgment

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