The merge of origin/main #1611 ("fold underscores in Claude project
slug") inadvertently regressed Windows behavior. #1611 kept the
pre-existing `.replace(/:/g, "")` so `C:\Users\dev\foo` slug-encoded
to `C-Users-dev-foo` (single dash), but Windows-side QA had already
established (commit 582c5373) that real Claude Code on Windows
produces `C--Users-dev-foo` — the colon position becomes a dash,
not stripped. Stripping the colon broke JSONL lookup on Windows so
session info / restore / metadata persistence all silently failed.
Two test files disagreed after the merge: activity-detection.test.ts
expected the Windows-correct double-dash form (kept by my merge),
while index.test.ts expected origin's single-dash form (added by
#1611). Linux CI ran activity-detection's case against the
single-dash impl and failed loudly.
Fix: drop the redundant `.replace(/:/g, "")`. The broader
`[^a-zA-Z0-9-]` regex already handles the colon as a dash, which
matches Claude's actual on-disk encoding on Windows. Updated
index.test.ts to expect `C--Users-dev-foo` and fixed an unrelated
local-Windows test bug where a hardcoded POSIX path string was
compared against a `pathJoin` result (passes on Linux CI but fails
locally on Windows).
Underscore folding from #1611 is preserved.
b7b34efd6c