fix(decrypt): remove redundant password trim check and empty file condition

test(pdf-tools): update expected tool count to 41

src/tests/pdf-tools.test.ts

@@ -19,7 +19,7 @@ describe('Tool Configuration Arrays', () => {
 
     it('should have the correct number of tools', () => {
       // This acts as a snapshot test to catch unexpected additions/removals.
-      expect(singlePdfLoadTools).toHaveLength(40);
+      expect(singlePdfLoadTools).toHaveLength(41);
     });
 
     it('should not contain any duplicate tools', () => {