Add icon generation script and list scroll helper

Introduce gen_icons.sh to regenerate UI icons from a manifest file using the FreeInk SDK's Lucide icon set. Add icons.manifest mapping UI icons to Lucide names. Refactor vertical swipe list scrolling into a reusable wasListScroll() helper method used by both reader chapter selection and settings activities. Add static assertion to ensure ThemeMetrics scaling stays in sync with struct changes.

scripts/gen_icons.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+# Regenerate src/components/icons/generated_icons.h from icons.manifest, using the
+# FreeInk SDK icon generator and its vendored Lucide submodule. generated_icons.h is
+# a committed build product of these inputs — re-run this after editing the manifest.
+#
+# Requires: rsvg-convert (librsvg) + Pillow, and the Lucide submodule fetched
+# (git submodule update --init in the SDK).
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+SDK="$ROOT/freeink-sdk"
+SVGDIR="$SDK/libs/assets/Icons/lucide/icons"
+
+if [ ! -d "$SVGDIR" ]; then
+  echo "Lucide SVGs not found at $SVGDIR" >&2
+  echo "Fetch the submodule:  git -C \"$SDK\" submodule update --init libs/assets/Icons/lucide" >&2
+  exit 1
+fi
+
+python3 "$SDK/libs/assets/Icons/tools/gen_icons.py" \
+  --manifest "$ROOT/src/components/icons/icons.manifest" \
+  --svgdir   "$SVGDIR" \
+  --sizes    24,32,40,48 \
+  --out      "$ROOT/src/components/icons/generated_icons.h"
+
+echo "Regenerated src/components/icons/generated_icons.h"