fix: image resize preview, todo checkbox alignment, modal overflow clip

- Image resize respects width attr in preview (no more snap-back)
- Single-task checkbox aligned with flex center instead of translateY hack
- Modal/detail containers clip card-bar at rounded corners
- Right-click on image no longer triggers resize (left-button only)
- Split dist.sh and bump.sh into separate scripts

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

bump.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+# Bump version in config.php + electron/package.json
+set -e
+
+if [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
+    echo "Usage: ./bump.sh [--patch|--minor|--major]"
+    echo ""
+    echo "  --patch   bump patch version (default)  1.3.5 → 1.3.6"
+    echo "  --minor   bump minor version             1.3.6 → 1.4.0"
+    echo "  --major   bump major version              1.4.0 → 2.0.0"
+    exit 0
+fi
+
+cd "$(dirname "$0")"
+
+CURRENT=$(grep "APP_VERSION" config.php | grep -oP "'[^']+'" | tail -1 | tr -d "'")
+IFS='.' read -r MAJOR MINOR PATCH <<< "$CURRENT"
+
+case "${1:---patch}" in
+    --major) MAJOR=$((MAJOR + 1)); MINOR=0; PATCH=0 ;;
+    --minor) MINOR=$((MINOR + 1)); PATCH=0 ;;
+    *)       PATCH=$((PATCH + 1)) ;;
+esac
+
+VERSION="${MAJOR}.${MINOR}.${PATCH}"
+
+# config.php
+sed -i "s/APP_VERSION', '${CURRENT}'/APP_VERSION', '${VERSION}'/" config.php
+
+# electron/package.json
+if [ -f electron/package.json ]; then
+    sed -i "s/\"version\": \"${CURRENT}\"/\"version\": \"${VERSION}\"/" electron/package.json
+fi
+
+# website footer
+if [ -f website/index.html ]; then
+    sed -i "s/v${CURRENT}/v${VERSION}/g" website/index.html
+fi
+
+echo "${CURRENT} → ${VERSION}"