[BUG] HTTP mode screenshot/resource links fall back to local path after first session

[aakashH242]

Env: HTTP mode, Streamable HTTP transport

Version: v0.1.0

Steps to Reproduce:

• Start server in HTTP mode.
• Initialize a session, take a screenshot (resource link works).
• Start a new HTTP session (new mcp-session-id) and take another screenshot.
  • Expected: Tool response contains resourceLinks and Screenshot saved to: http(s)://{host}:{port}{path}/resources/{session}/{id}/{filename} and listResources shows the file.
  • Actual: Response showed a local relative path (e.g., ../root/Downloads/...png); listResources was empty for the new session.