feat: remove InsertChar action and inline character handling; streamline input processing and autocomplete triggers

src/controller/input.rs

@@ -200,7 +200,16 @@ pub fn handle_key(key: KeyEvent, state: &mut AppStateRest) -> Vec<Action> {
                 state.input.close_autocomplete();
                 state.dirty = true;
             }
-            vec![Action::InsertChar(c)]
+            // Insert the character inline so we can immediately check the
+            // new buffer state for autocomplete triggers.
+            state.input.insert(c);
+            state.dirty = true;
+            // Show autocomplete immediately when the buffer starts with `/`,
+            // without requiring an extra Tab press.
+            if state.input.buffer.starts_with('/') {
+                state.input.open_autocomplete();
+            }
+            Vec::new()
         }
         _ => Vec::new(),
     }