Fix PDF decompression, add proper noun detection toggle, bump to 0.9.25

- document-scanner.js: Add missing await on _inflateSync() call — FlateDecode
  streams were not being decompressed because the async function was called
  without await, causing decompressed to hold a Promise instead of data
- content.js, storage.js, options.html, options.js: Gate proper noun / capital
  letter detection behind a new detectProperNouns setting (default off); was
  previously always-on causing noisy false-positive warnings on AI thinking
  output and common capitalized words
- Bump version 0.9.23 → 0.9.25

https://claude.ai/code/session_01ReZUeR1nrYzJeX7fTqwXMw

src/options/options.js

@@ -22,6 +22,7 @@ document.addEventListener('DOMContentLoaded', async () => {
   $('#showHighlights').checked = settings.showHighlights || false;
   $('#secretScanning').checked = settings.secretScanning !== false;
   $('#autoDetect').checked = settings.autoDetect !== false;
+  $('#detectProperNouns').checked = settings.detectProperNouns === true;
   $('#autoRedactDetected').checked = settings.autoRedactDetected !== false;
   $('#autoAddDetected').checked = settings.autoAddDetected !== false;
   $('#maxLogEntries').value = settings.maxLogEntries || 200;
@@ -273,6 +274,10 @@ document.addEventListener('DOMContentLoaded', async () => {
     await Storage.saveSettings({ autoDetect: e.target.checked });
   });
 
+  $('#detectProperNouns').addEventListener('change', async (e) => {
+    await Storage.saveSettings({ detectProperNouns: e.target.checked });
+  });
+
   $('#autoRedactDetected').addEventListener('change', async (e) => {
     await Storage.saveSettings({ autoRedactDetected: e.target.checked });
   });