fix(pai-statusline): Linux/WSL compatibility and UX improvements

[fayerman-source]

Summary

Fixes several issues preventing the pai-statusline pack from working correctly on Linux/WSL systems.

Before / After

Before (Broken)	After (Fixed)

Bug Fixes

1. Cross-platform stat command

The script used macOS-only stat -f %m syntax. Linux requires stat -c %Y.

Fix: OS detection at 3 locations:

if [[ "$OSTYPE" == "darwin"* ]]; then
    stat -f %m "$FILE"
else
    stat -c %Y "$FILE"
fi

2. jq not documented as dependency

The README stated dependencies: [] but the script uses jq 20+ times for JSON parsing. Without jq, all values silently fail to defaults.

Fix: Updated README to document jq as required dependency.

3. PWD has no fallback

When JSON input lacks directory info, PWD displays empty.

Fix: current_dir="${current_dir:-$PWD}"

UX Improvements

4. Icon spacing in MEMORY line

Before: 📁0 Work │ ✦2 Ratings
After: 📁 0 Work │ ✦ 2 Ratings

5. "No data" indicator changed from — to -.-

Why: When bugs occurred (missing jq, failing stat), the display showed — - identical to "no data available". This made debugging impossible since errors looked like missing data.

-.- is:

• Visually consistent with decimal format (X.X)
• Clearly intentional, not an error fallback
• Self-documenting as "placeholder for number"

Test Environment

• OS: Ubuntu (WSL2)
• Kernel: 6.6.87.2-microsoft-standard-WSL2
• Claude Code: 2.1.11

Test Plan

• Verified location displays correctly (Queens, New York)
• Verified PAI version displays (v2.3)
• Verified PWD displays directory name
• Verified weather displays
• Verified context percentage and sparklines work
• Verified MEMORY line spacing
• Verified -.- shows for periods with no rating data

---

🤖 Generated with Claude Code