refactor: trim both path separators at get_module_summary entry (#5)

prefix only feeds path_matches (which re-normalises internally), but the
'Normalise' comment promised more than trim_end_matches('/') delivered —
a trap for future direct consumers of the prefix. Behaviour-identical.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: anvanster

crates/codegraph-server/src/domain/module_summary.rs

@@ -60,8 +60,11 @@ pub(crate) fn get_module_summary(
     directory: &str,
     top_n: usize,
 ) -> ModuleSummaryResult {
-    // Normalise: strip trailing slash so prefix matching is consistent.
-    let prefix = directory.trim_end_matches('/');
+    // Normalise: strip trailing separators (either flavour — Windows callers
+    // pass `\`) so prefix matching is consistent. path_matches() re-normalises
+    // separators internally, but anything else that ever consumes `prefix`
+    // directly should see a clean value too.
+    let prefix = directory.trim_end_matches(['/', '\\']);
 
     let mut files: usize = 0;
     let mut total_functions: usize = 0;