feat: align motrix-style download UI/actions and stabilize aria2 ops

scripts/sync-aria2-from-motrix.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
+MOTRIX_DIR="${1:-/Users/A/Work/Motrix}"
+SRC_BASE="$MOTRIX_DIR/extra"
+DST_BASE="$ROOT_DIR/src-tauri/resources/engine"
+
+if [ ! -d "$SRC_BASE" ]; then
+  echo "[sync-aria2] Motrix extra directory not found: $SRC_BASE"
+  exit 1
+fi
+
+rm -rf "$DST_BASE"
+mkdir -p "$DST_BASE"
+
+copy_engine_dir() {
+  local src="$1"
+  local dst="$2"
+  if [ -d "$src" ]; then
+    mkdir -p "$dst"
+    cp "$src"/aria2c* "$dst"/ 2>/dev/null || true
+    cp "$src"/aria2.conf "$dst"/ 2>/dev/null || true
+    echo "[sync-aria2] copied $src -> $dst"
+  fi
+}
+
+# macOS
+copy_engine_dir "$SRC_BASE/darwin/arm64/engine" "$DST_BASE/darwin/arm64"
+copy_engine_dir "$SRC_BASE/darwin/x64/engine" "$DST_BASE/darwin/x64"
+
+# Linux aliases
+copy_engine_dir "$SRC_BASE/linux/x64/engine" "$DST_BASE/linux/x64"
+copy_engine_dir "$SRC_BASE/linux/arm64/engine" "$DST_BASE/linux/arm64"
+copy_engine_dir "$SRC_BASE/linux/armv7l/engine" "$DST_BASE/linux/armv7l"
+
+# Windows
+copy_engine_dir "$SRC_BASE/win32/x64/engine" "$DST_BASE/win32/x64"
+copy_engine_dir "$SRC_BASE/win32/ia32/engine" "$DST_BASE/win32/ia32"
+
+echo "[sync-aria2] done"