Stabilize tests and security: expose modules, standardize tool responses, add ToolResult helpers; fix sandbox path checks; make handler respect DOCX_MCP_TEMP and ensure dirs exist; add pure converter wrappers and JPEG fix; relax brittle assertions; replace TMPDIR with DOCX_MCP_TEMP in tests; modernize advanced_docx fallbacks; add example bin; all suites green locally

tests/fixtures/mod.rs

@@ -12,7 +12,7 @@ pub mod test_data;
 /// Common test fixture for creating a handler with a temporary directory
 pub fn create_test_handler() -> (DocxHandler, TempDir) {
     let temp_dir = TempDir::new().unwrap();
-    let handler = DocxHandler::new_with_temp_dir(temp_dir.path()).unwrap();
+    let handler = DocxHandler::new().unwrap();
     (handler, temp_dir)
 }