fix: guard RendererPaths for settings window (no userDataPath)

Settings window opens without ?udp= parameter, so RendererPaths
constructor threw on null path. Wrap in try/catch — paths stays
null when unavailable, which is fine for the settings page.

Author: xronocode

src/renderer/src/bootstrap.js

@@ -95,7 +95,12 @@ const bootstrapRenderer = () => {
   window.addEventListener('unhandledrejection', handleRendererError)
 
   const { debug, initialState, userDataPath, windowId, type } = parseUrlArgs()
-  const paths = new RendererPaths(userDataPath)
+  let paths = null
+  try {
+    paths = new RendererPaths(userDataPath)
+  } catch {
+    // Settings window doesn't pass userDataPath — paths stays null
+  }
   const marktext = {
     initialState,
     env: {