fix: resolve compilation errors after upstream merge

- Remove non-existent custom_terminal module import
- Fix duplicate EventMsg import in app.rs
- Fix create_diff_summary function call with correct parameters
- Remove unused light_blue import

Build now completes successfully.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

codex-rs/tui/src/app.rs

@@ -440,7 +440,6 @@ impl App<'_> {
                         use std::collections::HashMap;
 
                         use codex_core::protocol::ApplyPatchApprovalRequestEvent;
-                        use codex_core::protocol::EventMsg;
                         use codex_core::protocol::FileChange;
 
                         self.app_event_tx.send(AppEvent::CodexEvent(Event {

codex-rs/tui/src/history_cell.rs

@@ -396,7 +396,6 @@ impl HistoryCell {
     }
 
     fn new_parsed_command(parsed_commands: &[ParsedCommand], output: Option<&CommandOutput>) -> Vec<Line<'static>> {
-        use crate::colors::light_blue;
         
         let mut lines: Vec<Line> = vec![Line::from("⚙︎ Working")];