fix(context-timeline): cross-platform path encoding

[schizoidcock]

Summary

Fix _encode_cwd function to work on Windows and any other platform.

Problem

The original implementation only replaced / with -:

return cwd.replace("/", "-")

This fails on Windows where paths use \ as separator and include drive letters like D:.

Solution

Use regex to replace any non-alphanumeric character:

return re.sub(r"[^a-zA-Z0-9]", "-", os.path.normpath(os.path.abspath(cwd)))

Before/After

Platform	Input	Before	After
Windows	D:\Claude\mcx	Lookup failed	D--Claude-mcx
Unix	/home/user/mcx	-home-user-mcx	-home-user-mcx

Test plan

• Tested on Windows 11 with Claude Code
• Verified the encoded path matches Claude Code project directory naming

---

Summary by cubic

Fix cross-platform path encoding in the context timeline so transcript lookup works on Windows and Unix. _encode_cwd now normalizes the path and replaces all non-alphanumeric characters with "-" to match Claude Code project naming.

• Bug Fixes
  • Replaced slash-only logic with regex over normalized absolute path; Windows paths like D:... now encode correctly; Unix behavior unchanged.
  • Area: components (cli-tool/components/); updated hooks/monitoring/context-timeline.py.
  • No new components; catalog (docs/components.json) unchanged.
  • No new environment variables or secrets.

^{Written for commit 4ebeb08. Summary will update on new commits. Review in cubic}

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This PR touches cli-tool/components/** and has been marked review-pending.

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[cubic-dev-ai]

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