Add desktop tray widget + installer wizard

- Desktop widget (Python/pystray): system tray icon showing 5h usage as
  circular progress bar with Claude starburst logo, 10-step green-to-red
  color scale, right-click menu with usage stats and configuration
- Shared cache: both widget and CLI statusline read/write the same
  /tmp/claude_usage.json — only one fetcher needs to run
- Installer wizard (install_wizard.py): interactive cross-platform setup
  with component selection, session key prompt, cron/autostart config
- OS wrappers: install.sh (Linux/macOS) and install.ps1 (Windows) find
  Python 3.9+ and launch the wizard
- README with topology diagram, usage docs, and configuration reference

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

install.sh

@@ -1,78 +1,28 @@
 #!/usr/bin/env bash
-# Install claude-statusline for the current user.
+# Linux/macOS wrapper — launches the cross-platform installer wizard.
 # Usage: bash install.sh
 set -euo pipefail
 
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
-INSTALL_DIR="${HOME}/.local/share/claude-statusline"
-CONFIG_DIR="${HOME}/.config/claude-statusline"
-CLAUDE_DIR="${HOME}/.claude"
 
-# --- Check Node.js version (need 18+ for built-in fetch) ---
-NODE_BIN="$(which node 2>/dev/null || echo '')"
-if [ -z "$NODE_BIN" ]; then
-    echo "ERROR: Node.js not found. Install Node.js 18+ first."
-    exit 1
-fi
-NODE_MAJOR=$("$NODE_BIN" -e "process.stdout.write(String(process.versions.node.split('.')[0]))")
-if [ "$NODE_MAJOR" -lt 18 ]; then
-    echo "ERROR: Node.js $("$NODE_BIN" --version) found, but 18+ is required (built-in fetch)."
-    exit 1
-fi
-echo "==> Node.js v${NODE_MAJOR} found at $NODE_BIN"
-
-echo "==> Installing claude-statusline..."
-
-# Copy scripts
-mkdir -p "$INSTALL_DIR"
-cp "$SCRIPT_DIR/statusline.js" "$INSTALL_DIR/"
-cp "$SCRIPT_DIR/fetch-usage.js" "$INSTALL_DIR/"
-chmod +x "$INSTALL_DIR"/*.js
-
-# Create config dir
-mkdir -p "$CONFIG_DIR"
-if [ ! -f "$CONFIG_DIR/session-key" ]; then
-    echo "# Paste your claude.ai sessionKey cookie value here" > "$CONFIG_DIR/session-key"
-    chmod 600 "$CONFIG_DIR/session-key"
-    echo "    Created $CONFIG_DIR/session-key (edit with your session key)"
-fi
-
-# Configure Claude Code statusline
-mkdir -p "$CLAUDE_DIR"
-SETTINGS="$CLAUDE_DIR/settings.json"
-
-if [ -f "$SETTINGS" ]; then
-    if grep -q '"statusLine"' "$SETTINGS" 2>/dev/null; then
-        echo "    statusLine already configured in $SETTINGS — skipping"
-    else
-        "$NODE_BIN" -e "
-const fs = require('fs');
-const settings = JSON.parse(fs.readFileSync('$SETTINGS', 'utf8'));
-settings.statusLine = {
-  type: 'command',
-  command: '$NODE_BIN --no-warnings $INSTALL_DIR/statusline.js'
-};
-fs.writeFileSync('$SETTINGS', JSON.stringify(settings, null, 2) + '\n');
-"
-        echo "    Added statusLine to $SETTINGS"
+# Find Python 3.9+
+PYTHON=""
+for candidate in python3 python; do
+    if command -v "$candidate" &>/dev/null; then
+        major_minor=$("$candidate" -c "import sys; print(f'{sys.version_info.major}.{sys.version_info.minor}')")
+        major=$("$candidate" -c "import sys; print(sys.version_info.major)")
+        minor=$("$candidate" -c "import sys; print(sys.version_info.minor)")
+        if [ "$major" -ge 3 ] && [ "$minor" -ge 9 ]; then
+            PYTHON="$candidate"
+            break
+        fi
     fi
-else
-    cat > "$SETTINGS" <<SEOF
-{
-  "statusLine": {
-    "type": "command",
-    "command": "${NODE_BIN} --no-warnings ${INSTALL_DIR}/statusline.js"
-  }
-}
-SEOF
-    echo "    Created $SETTINGS with statusLine config"
+done
+
+if [ -z "$PYTHON" ]; then
+    echo "ERROR: Python 3.9+ is required to run the installer."
+    echo "Install Python 3.9+ and try again."
+    exit 1
 fi
 
-# Offer cron setup
-echo ""
-echo "==> Optional: set up usage fetcher cron (every 5 min):"
-echo "    crontab -e"
-echo "    */5 * * * * ${NODE_BIN} ${INSTALL_DIR}/fetch-usage.js 2>/dev/null"
-echo ""
-echo "==> Done! Restart Claude Code to see the statusline."
-echo "    Don't forget to add your session key to: $CONFIG_DIR/session-key"
+exec "$PYTHON" "$SCRIPT_DIR/install_wizard.py"