fix(tui): resolve remaining clippy errors in workspace

- turn.rs: remove needless ref borrowing
- view/mod.rs: use unit struct directly instead of ::default() for
  ChatComponent, InputComponent, StatusBarComponent, SidebarComponent

These were uncovered after fixing the infrastructure crate errors.

apps/interfaces/tui/src/turn.rs

@@ -23,7 +23,7 @@ fn resolve_api_key(state: &AppStateRest, provider_name: &str) -> String {
     if let Some(key) = state.settings.api_keys.get(provider_name) {
         return key.clone();
     }
-    if let Some(ref cfg) = state.app_config.providers.get(provider_name) {
+    if let Some(cfg) = state.app_config.providers.get(provider_name) {
         if let Some(ref default_key) = cfg.default_api_key {
             if !default_key.is_empty() {
                 return default_key.clone();

apps/interfaces/tui/src/view/mod.rs

@@ -29,7 +29,7 @@ const SIDEBAR_MIN_WIDTH: u16 = 90;
 /// This separates cache mutation from rendering so `draw` can take
 /// `&AppStateRest` (required by `terminal.draw` closure constraints).
 pub fn pre_render(state: &mut AppStateRest) {
-    let mut chat_comp = chat::ChatComponent::default();
+    let mut chat_comp = chat::ChatComponent;
     chat_comp.pre_render(state);
 }
 
@@ -67,18 +67,18 @@ pub fn draw(frame: &mut Frame, state: &AppStateRest) {
         let overlay = state.misc.overlay;
         overlays::render_overlay(frame, chat_area, overlay, state);
     } else {
-        let mut chat_comp = chat::ChatComponent::default();
+        let mut chat_comp = chat::ChatComponent;
         chat_comp.draw(frame, chat_area, state);
     }
 
-    let mut input_comp = input::InputComponent::default();
+    let mut input_comp = input::InputComponent;
     input_comp.draw(frame, input_area, state);
 
-    let mut status_comp = status::StatusBarComponent::default();
+    let mut status_comp = status::StatusBarComponent;
     status_comp.draw(frame, status_area, state);
 
     if let Some(sidebar_rect) = sidebar_area {
-        let mut sidebar_comp = sidebar::SidebarComponent::default();
+        let mut sidebar_comp = sidebar::SidebarComponent;
         sidebar_comp.draw(frame, sidebar_rect, state);
     }