feat(tui): Make search case insensitive by default

src/tui.rs

@@ -248,13 +248,25 @@ fn fuzzy_search(search: &str, text: &str) -> Option<Vec<usize>> {
     let mut found_indices = Vec::new();
     let mut start_idx = 0;
 
-    for ch in search.chars() {
+    let mut case_sensitive = false;
+
+    for (ch_idx, ch) in search.char_indices() {
+        if ch_idx == 0 {
+            case_sensitive = ch.is_uppercase();
+        }
+
         let remaining = &text[start_idx..];
 
         let mut found = false;
 
         for (byte_idx, txt_ch) in remaining.char_indices() {
-            if ch == txt_ch {
+            let matching = if case_sensitive {
+                ch == txt_ch
+            } else {
+                ch.to_lowercase().cmp(txt_ch.to_lowercase()).is_eq()
+            };
+
+            if matching {
                 found_indices.push(start_idx + byte_idx);
                 start_idx += byte_idx + txt_ch.len_utf8();
                 found = true;