fix: embed Sparkle dynamic frameworks into app bundle to resolve crash

Scripts/create_app_bundle.sh

@@ -42,11 +42,24 @@ if [[ -n "$ARIA2C_PATH" && -x "$ARIA2C_PATH" ]]; then
   fi
   
   FRAMEWORKS_DIR="$CONTENTS_DIR/Frameworks"
+  mkdir -p "$FRAMEWORKS_DIR"
   dylibbundler -od -b -x "$RESOURCES_DIR/aria2c" -d "$FRAMEWORKS_DIR" -p "@executable_path/../Frameworks/"
 else
   echo "WARNING: aria2c not found! It will not be bundled. Please install it first."
 fi
 
+FRAMEWORKS_DIR="$CONTENTS_DIR/Frameworks"
+mkdir -p "$FRAMEWORKS_DIR"
+if [ -d ".build/artifacts/sparkle/Sparkle/Sparkle.xcframework/macos-arm64_x86_64/Sparkle.framework" ]; then
+  cp -R ".build/artifacts/sparkle/Sparkle/Sparkle.xcframework/macos-arm64_x86_64/Sparkle.framework" "$FRAMEWORKS_DIR/Sparkle.framework"
+fi
+if [ -d ".build/artifacts/sparkle/Sparkle/SparkleCore.xcframework/macos-arm64_x86_64/SparkleCore.framework" ]; then
+  cp -R ".build/artifacts/sparkle/Sparkle/SparkleCore.xcframework/macos-arm64_x86_64/SparkleCore.framework" "$FRAMEWORKS_DIR/SparkleCore.framework"
+fi
+
+install_name_tool -add_rpath "@executable_path/../Frameworks" "$MACOS_DIR/$APP_NAME" || true
+
+
 cat > "$CONTENTS_DIR/Info.plist" <<PLIST
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

appcast.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<rss version="2.0" xmlns:sparkle="http://www.andymatuschak.org/xml-namespaces/sparkle" xmlns:dc="http://purl.org/dc/elements/1.1/">
+  <channel>
+    <title>Firelink Updates</title>
+    <link>https://github.com/nimbold/Firelink</link>
+    <description>Most recent updates for Firelink</description>
+    <language>en</language>
+    <item>
+      <title>Version 0.5.7</title>
+      <sparkle:minimumSystemVersion>14.0</sparkle:minimumSystemVersion>
+      <sparkle:releaseNotesLink>https://github.com/nimbold/Firelink/releases/tag/v0.5.7</sparkle:releaseNotesLink>
+      <pubDate>Sat, 06 Jun 2026 11:36:06 +0000</pubDate>
+      <enclosure url="https://github.com/nimbold/Firelink/releases/download/v0.5.7/Firelink-0.5.7-mac-arm64.dmg"
+                 sparkle:version="0.5.7"
+                 sparkle:shortVersionString="0.5.7"
+                 length="7855846"
+                 type="application/octet-stream"
+                 sparkle:edSignature="WQPg1Pv0syLjVehJSn/39gmYxAPwAeHdUgJQxCXnXG4wKpqKWt9F9/UqeMilcxK4Dba0S0cn3GIk1KZJ7vR8Cw==" />
+    </item>
+  </channel>
+</rss>