Rebind fd/rg to Ctrl+F and Ctrl+R

Alt+F7 and Ctrl+G were awkward and unmemorable. Ctrl+F (find) and
Ctrl+R (ripgrep) are one-handed and mnemonic. Updated help entries.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: ioma8

src/presentation/shortcuts.rs

@@ -156,11 +156,11 @@ fn handle_search(
         *shell_command = Some(String::new());
         return Some(true);
     }
-    if event.code == KeyCode::F(7) && event.modifiers.contains(KeyModifiers::ALT) {
+    if event.code == KeyCode::Char('f') && event.modifiers.contains(KeyModifiers::CONTROL) {
         *find_filter = Some(String::new());
         return Some(true);
     }
-    if event.code == KeyCode::Char('g') && event.modifiers.contains(KeyModifiers::CONTROL) {
+    if event.code == KeyCode::Char('r') && event.modifiers.contains(KeyModifiers::CONTROL) {
         *ripgrep_filter = Some(String::new());
         return Some(true);
     }

src/presentation/terminal/renderer.rs

@@ -881,8 +881,8 @@ fn default_help_entries() -> Vec<(&'static str, &'static str)> {
         ("F7", "New folder"),
         ("F8", "Delete"),
         ("Ctrl+W", "Delete (alias)"),
-        ("Alt+F7", "Find (fd)"),
-        ("Ctrl+G", "RipGrep"),
+        ("Ctrl+F", "Find files (fd)"),
+        ("Ctrl+R", "Search contents (rg)"),
         ("!", "Shell command"),
         ("Ctrl+D", "Favorites"),
         ("Space", "Toggle selection"),