feat(fls): installed applications as Java loads them

readSystemSoftware lists a PC's or notebook's installed applications with
the settings the model needs: server applications switched on and their
port, the generic client's target, DNS recursion, web server virtual
hosts, Gnutella's peer limit and the personal firewall (on by default,
unlike a router's). Defaults the file leaves out are measured in Java.
All 23 corpus files match Java.

Two examples install an application of their own (Accumulator,
Broadcast), compiled into projekt/anwendungen; it is left out with a
warning, as this reader cannot run Java classes. It must survive a save.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/fls/src/javabeans.ts

@@ -219,6 +219,15 @@ export function decodeXmlBytes(bytes: Uint8Array): string {
 const PRIMITIVE_ID_PREFIXES = new Set(['Integer', 'Boolean', 'Long', 'Short', 'Byte', 'Float', 'Double', 'Character']);
 const DEFAULTS = javaDefaults as Readonly<Record<string, string | number | boolean | null>>;
 
+/**
+ * What a getter returns on a freshly constructed object of `simpleClass`, as
+ * measured (javaDefaults.json) — undefined where nothing was measured.
+ */
+export function javaDefault(simpleClass: string, property: string): string | number | boolean | null | undefined {
+  const key = `${simpleClass}#${property}`;
+  return Object.hasOwn(DEFAULTS, key) ? DEFAULTS[key] : undefined;
+}
+
 /** `getFoo`/`isFoo` → `foo`, as java.beans.Introspector derives it. */
 function propertyOfGetter(method: string): string | undefined {
   const match = /^(?:get|is)([A-Z].*)$/.exec(method);