fix(review): hide-whitespace now ignores interior whitespace to match GitHub (#635)

The diff library's ignoreWhitespace only trims leading/trailing whitespace,
so interior changes (alignment padding, extra spaces between tokens) still
showed as diffs. Normalize all whitespace before diffing to match git diff -w.

Also adds a real code change to the settings.ts demo so the file isn't fully
collapsed when hide-whitespace is on.

Author: backnotprop

bun.lock

@@ -300,10 +300,10 @@ export const DiffViewer: React.FC<DiffViewerProps> = ({
     if (!fileContents || fileContents.forPath !== filePath || (fileContents.old == null && fileContents.new == null)) return fileDiff;
     try {
       if (hideWhitespace && fileContents.old != null && fileContents.new != null) {
+        const normalize = (s: string) => s.split('\n').map(l => l.replace(/\s+/g, ' ').trim()).join('\n');
         return parseDiffFromFile(
-          { name: oldPath || filePath, contents: fileContents.old },
-          { name: filePath, contents: fileContents.new },
-          { ignoreWhitespace: true },
+          { name: oldPath || filePath, contents: normalize(fileContents.old) },
+          { name: filePath, contents: normalize(fileContents.new) },
         );
       }
       const result = processFile(patch, {

packages/review-editor/components/DiffViewer.tsx

@@ -73,7 +73,7 @@ export function getDatabaseConfig() {
         connectionString: config.DATABASE_URL,
         pool: {
             min: 2,
-            max: config.NODE_ENV === 'production' ? 20 : 5,
+            max: config.NODE_ENV === 'production' ? 20 : 10,
         },
         ssl: config.NODE_ENV === 'production',
     };
@@ -335,7 +335,7 @@ index 5678901..efghijk 100644
 +        connectionString: config.DATABASE_URL,
 +        pool: {
 +            min: 2,
-+            max: config.NODE_ENV === 'production' ? 20 : 5,
++            max: config.NODE_ENV === 'production' ? 20 : 10,
 +        },
 +        ssl: config.NODE_ENV === 'production',
 +    };