hooks/ponytail-mode-tracker.js: colon syntax /ponytail:review silently falls through to getDefaultMode()

[nanaubusiness]

File: hooks/ponytail-mode-tracker.js

Lines: 17-32

Bug: When a user invokes /ponytail:review (colon syntax), the command string is parsed as a single token with no space, so arg is empty. The code checks conditions like cmd === '/ponytail-review' but never checks for /ponytail:review. As a result, the command falls through to getDefaultMode() instead of activating review mode.

Root cause: The regex /^[/@$]ponytail/ and the subsequent split(/\s+/) only handles space-delimited arguments. Colon-delimited subcommands (e.g., /ponytail:review, /ponytail:ponytail) are treated as a single command string with no argument.

Trace for /ponytail:review:

1. prompt.split(/\s+/) → ['/ponytail:review'\]
2. parts[0] = /ponytail:review, arg = '' (empty, no second token)
3. Line 24: cmd === '/ponytail-review' → false, cmd === '/ponytail:ponytail-review' → false
4. Line 26: cmd === '/ponytail' → false (cmd is /ponytail:review)
5. Falls through to getDefaultMode() — WRONG, user wanted review mode

Impact: Users invoking Ponytail with colon syntax get silently wrong behavior instead of an error or correct mode activation.

Reproduction:

# In Claude Code:
/ponytail:review   # Should activate review mode, but falls through to default

[nanaubusiness]

Duplicate of #361 — already fixed in PR #367.