v0.9.1 — Windows Claude Code session discovery fix

• Fix: Claude Code session discovery on Windows — workspace-to-project-dir matching is now case-insensitive on win32 (#57, part of #4)
  • VS Code reports drive letters lowercase (c:\...) while Claude Code encodes them uppercase (C--...), so the encoded-directory lookup, the subfolder-session prefix check, and the cwd containment check could all silently miss — no sessions appeared at all
  • The workspace project dir is now resolved to its actual on-disk casing at startup, and all path comparisons are case-folded on Windows (matching the Codex-side fix from 0.9.0)