fix: add --all to cargo fmt in script/test and autoformat codebase

cargo fmt without --all fails with "Failed to find targets" in
workspace repos. This was blocking every story's gates. Also ran
cargo fmt --all to fix all existing formatting issues.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/src/io/search.rs

@@ -159,7 +159,9 @@ mod tests {
         let state = SessionState::default();
         *state.project_root.lock().unwrap() = Some(dir.path().to_path_buf());
 
-        let results = search_files("target_text".to_string(), &state).await.unwrap();
+        let results = search_files("target_text".to_string(), &state)
+            .await
+            .unwrap();
 
         assert_eq!(results.len(), 1);
         assert_eq!(results[0].path, "found.txt");