Refactor SessionManager into SessionTracker

[bhouston]

Refactor SessionManager into SessionTracker

Currently, we have two components that manage browser sessions:

• SessionManager in /packages/agent/src/tools/session/lib/SessionManager.ts
• SessionTracker in /packages/agent/src/tools/session/SessionTracker.ts

These components have overlapping functionality but are implemented separately. We need to merge the functionality of SessionManager into SessionTracker to reduce duplication and simplify the codebase.

Tasks

• Merge the functionality from SessionManager into SessionTracker
• Update any references to SessionManager to use SessionTracker instead
• Ensure proper browser session cleanup is maintained
• Remove the SessionManager class once the refactoring is complete
• Update any tests that might be affected

Technical Details

• Both classes work with browser sessions but in slightly different ways
• SessionTracker is focused on tracking session state
• SessionManager handles creating and closing sessions
• We need to combine these responsibilities into a single class

Impact

This refactoring will simplify our codebase and reduce maintenance overhead by eliminating duplicate functionality.

[bhouston]

Not required.