Fix search highlight indices after tree rebuild (v0.2.2)

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "zfsdu"
-version = "0.2.1"
+version = "0.2.2"
 edition = "2021"
 description = "ncdu-like disk usage viewer for ZFS with snapshot management"
 authors = ["Florian Schermer"]

src/app.rs

@@ -212,6 +212,7 @@ impl App {
     pub fn rebuild_tree(&mut self) {
         self.tree_items = Self::build_tree_view(&self.root_entries, 0, &[], &self.expanded, "");
         self.apply_filter();
+        self.refresh_search_matches();
         self.ensure_valid_selection();
     }
 
@@ -561,6 +562,29 @@ impl App {
         self.search_matches.contains(&real_index)
     }
 
+    fn refresh_search_matches(&mut self) {
+        if self.search_query.is_empty() {
+            return;
+        }
+        self.search_matches.clear();
+        let query = self.search_query.to_lowercase();
+        for (i, tree_item) in self.tree_items.iter().enumerate() {
+            if tree_item.visible {
+                let name = tree_item.item.full_name().to_lowercase();
+                if name.contains(&query) {
+                    self.search_matches.push(i);
+                }
+            }
+        }
+        if !self.search_matches.is_empty() {
+            if self.current_match >= self.search_matches.len() {
+                self.current_match = self.search_matches.len() - 1;
+            }
+        } else {
+            self.current_match = 0;
+        }
+    }
+
     // Select/Unselect Group (like MC) - works in current scope
     pub fn select_group(&mut self) {
         let current_parent = if let Some(real_idx) = self.nth_visible(self.selected) {