fix(skill): unquote $ARGUMENTS and add marketplace plugin path

- Remove double quotes around $ARGUMENTS so argparse can parse flags
  like --deep, --store separately instead of as part of the topic string.
  Fixes #61.

- Add ~/.claude/plugins/marketplaces/last30days-skill to the path
  discovery loop so marketplace installs can find scripts/.
  Fixes #54.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

SKILL.md

@@ -173,6 +173,7 @@ for dir in \
   "." \
   "${CLAUDE_PLUGIN_ROOT:-}" \
   "${GEMINI_EXTENSION_DIR:-}" \
+  "$HOME/.claude/plugins/marketplaces/last30days-skill" \
   "$HOME/.gemini/extensions/last30days-skill" \
   "$HOME/.gemini/extensions/last30days" \
   "$HOME/.claude/skills/last30days" \
@@ -186,7 +187,7 @@ if [ -z "${SKILL_ROOT:-}" ]; then
   exit 1
 fi
 
-python3 "${SKILL_ROOT}/scripts/last30days.py" "$ARGUMENTS" --emit=compact --no-native-web --save-dir=~/Documents/Last30Days  # Add --x-handle=HANDLE if RESOLVED_HANDLE is set
+python3 "${SKILL_ROOT}/scripts/last30days.py" $ARGUMENTS --emit=compact --no-native-web --save-dir=~/Documents/Last30Days  # Add --x-handle=HANDLE if RESOLVED_HANDLE is set
 ```
 
 Use a **timeout of 300000** (5 minutes) on the Bash call. The script typically takes 1-3 minutes.