chore: import upstream snapshot with attribution

scripts/capture_screenshot.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+# Capture jcode screenshots with your actual terminal theme
+# Usage: ./capture_screenshot.sh [output_name]
+
+set -e
+
+OUTPUT_DIR="$(dirname "$0")/../docs/screenshots"
+OUTPUT_NAME="${1:-jcode-screenshot}"
+OUTPUT_PATH="$OUTPUT_DIR/${OUTPUT_NAME}.png"
+
+mkdir -p "$OUTPUT_DIR"
+
+echo "📸 jcode Screenshot Capture"
+echo ""
+echo "Instructions:"
+echo "  1. Make sure jcode is running in a visible terminal"
+echo "  2. Set up the UI state you want to capture"
+echo "  3. Press Enter here, then click on the jcode window"
+echo ""
+read -p "Press Enter when ready..."
+
+# Use slurp to let user select a window/region, then capture with grim
+GEOMETRY=$(slurp)
+if [ -n "$GEOMETRY" ]; then
+    grim -g "$GEOMETRY" "$OUTPUT_PATH"
+    echo "✅ Saved to: $OUTPUT_PATH"
+
+    # Show the image dimensions
+    if command -v file &>/dev/null; then
+        file "$OUTPUT_PATH"
+    fi
+else
+    echo "❌ No region selected"
+    exit 1
+fi