refactor: use shared emoji_widths.py library in status_handler

Replaced hardcoded WIDTH_2_SINGLE/WIDTH_2_EMOJIS sets with shared
emoji_widths.py library that reads from emoji-widths.json.

Added missing emojis to emoji-widths.json:
- 📁 (folder), 🌿 (herb), 📝 (memo), 🚀 (rocket)

This centralizes emoji width definitions so all handlers use the same
source of truth, making it easier to add new emojis and support
different terminals.

Author: cowwoc

plugin/emoji-widths.json

@@ -34,15 +34,20 @@
     "triangle_hollow": "▹",
     "diamond": "◆",
     "four_pointed_star": "✦",
-    "warning": "⚠"
+    "warning": "⚠",
+    "folder": "📁",
+    "herb": "🌿",
+    "memo": "📝",
+    "rocket": "🚀"
   },
   "terminals": {
     "Windows Terminal": {
       "☑️": 2, "🔄": 2, "🔳": 2, "🚫": 2, "🚧": 2,
       "📊": 2, "📦": 2, "🎯": 2, "📋": 2, "⚙️": 2, "🏆": 2,
       "🧠": 2, "🐱": 2, "🧹": 2, "🤝": 2, "✅": 2,
       "🔍": 2, "👀": 2, "🔭": 2, "⏳": 2, "⚡": 2, "🔒": 2, "✨": 2, "⚠️": 2,
-      "✓": 1, "✗": 1, "→": 1, "•": 1, "▸": 1, "▹": 1, "◆": 1, "✦": 2, "⚠": 1
+      "✓": 1, "✗": 1, "→": 1, "•": 1, "▸": 1, "▹": 1, "◆": 1, "✦": 2, "⚠": 1,
+      "📁": 2, "🌿": 2, "📝": 2, "🚀": 2
     }
   }
 }

plugin/hooks/skill_handlers/status_handler.py

@@ -5,6 +5,7 @@
 """
 
 import re
+import sys
 from pathlib import Path
 
 from . import register_handler
@@ -13,55 +14,21 @@
 SCRIPT_DIR = Path(__file__).parent.parent
 PLUGIN_ROOT = SCRIPT_DIR.parent
 
+# Add scripts/lib to path for emoji_widths import
+_LIB_PATH = PLUGIN_ROOT / "scripts" / "lib"
+if str(_LIB_PATH) not in sys.path:
+    sys.path.insert(0, str(_LIB_PATH))
 
-# Emojis that display as width 2 in most terminals
-WIDTH_2_EMOJIS = {
-    '📊', '📦', '🎯', '📋', '⚙️', '🏆', '🧠', '🐱', '🧹', '🤝',
-    '✅', '🔍', '👀', '🔭', '⏳', '⚡', '🔒', '✨', '⚠️', '✦',
-    '☑️', '🔄', '🔳', '🚫', '🚧', '🚀'
-}
+# Import shared emoji width library
+from emoji_widths import EmojiWidths as _EmojiWidths
 
-# Single-character emojis (without variation selector) that are width 2
-WIDTH_2_SINGLE = {
-    '📊', '📦', '🎯', '📋', '🏆', '🧠', '🐱', '🧹', '🤝',
-    '✅', '🔍', '👀', '🔭', '⏳', '⚡', '🔒', '✨', '✦',
-    '🔄', '🔳', '🚫', '🚧', '🚀',
-    # Added for cleanup_handler
-    '📁', '🌿', '📝',
-}
+# Singleton instance for emoji width calculations
+_emoji_widths = _EmojiWidths(plugin_root=PLUGIN_ROOT)
 
 
 def display_width(text: str) -> int:
-    """Calculate terminal display width of a string."""
-    width = 0
-    i = 0
-    while i < len(text):
-        char = text[i]
-
-        # Check for two-character emoji sequences (char + variation selector)
-        if i + 1 < len(text):
-            two_char = text[i:i+2]
-            if two_char in WIDTH_2_EMOJIS:
-                width += 2
-                i += 2
-                continue
-
-        # Check for single-character width-2 emojis
-        if char in WIDTH_2_SINGLE:
-            width += 2
-            i += 1
-            continue
-
-        # Skip variation selectors (they don't add width)
-        if char == '\ufe0f':  # variation selector-16
-            i += 1
-            continue
-
-        # All other characters are width 1
-        width += 1
-        i += 1
-
-    return width
+    """Calculate terminal display width of a string using shared emoji_widths library."""
+    return _emoji_widths.display_width(text)
 
 
 def build_line(content: str, max_width: int) -> str: