fix(session): Windows session directory filters treat slash-equivalent paths as different

[jacky-2014-sn]

Description

On Windows, session filtering can treat slash-equivalent directory paths as different locations. A session stored under a path like C:\repo\packages\opencode can be missed when the request or cursor uses C:/repo/packages/opencode.

This affects both normal session list filtering and v2 cursor validation. It also shows up for legacy session rows that do not have a path value and still fall back to directory matching.

Plugins

None

OpenCode version

1.15.3

Steps to reproduce

1. On Windows, create sessions from nested directories inside the same git repo.
2. List sessions or continue pagination using a slash-normalized directory path.
3. Observe that matching sessions may be omitted, or v2 cursor requests may be rejected because the directory string does not match exactly.

Screenshot and/or share link

N/A

Operating System

Windows 11

Terminal

PowerShell

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• [Windows] Web UI not showing sessions - path separator mismatch (backslash vs forward slash) #21340: Windows Web UI not showing sessions due to path separator mismatch (backslash vs forward slash)
• Sessions missing from sidebar on Windows due to path separator mismatch #23864: Sessions missing from sidebar on Windows due to path separator mismatch
• [BUG][Windows][global project] Root directory sessions can disappear after a new session is created from another client because session matching is still path-format sensitive #17183: Root directory sessions can disappear on Windows because session matching is path-format sensitive

If your issue is distinct from these, please clarify how it differs.