feat: enhance strictness of Rust compiler settings and improve code quality by treating warnings as errors

src/view/mod.rs

@@ -656,8 +656,8 @@ fn render_overlay(
                 })
                 .unwrap_or((0, 0, 0, 0));
             let elapsed_ms = chrono::Utc::now().timestamp_millis().saturating_sub(session_start);
-            let hours = elapsed_ms / 3600000;
-            let minutes = (elapsed_ms % 3600000) / 60000;
+            let hours = elapsed_ms / 3_600_000;
+            let minutes = (elapsed_ms % 3_600_000) / 60_000;
             let seconds = (elapsed_ms % 60000) / 1000;
             let total_tokens = tokens_in.saturating_add(tokens_out);
             let self_learning_total = review_tokens;

src/view/status.rs

@@ -25,7 +25,7 @@ pub fn draw_status_bar(frame: &mut Frame, area: Rect, state: &crate::app::state:
     let spinner_frames = ["⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"];
 
     // ── Agent status badge ────────────────────────────────────────────────
-    let (status_text, status_bg, status_fg) = if state.turn_in_flight() {
+    let (status_text, badge_bg, status_fg) = if state.turn_in_flight() {
         let f = spinner_frames[(state.misc.tick_count as usize / 2) % spinner_frames.len()];
         (format!(" {} PROG ", f), Theme::MODE_YOLO, Theme::BG)
     } else if state.misc.api_connected {
@@ -38,7 +38,7 @@ pub fn draw_status_bar(frame: &mut Frame, area: Rect, state: &crate::app::state:
         status_text,
         Style::default()
             .fg(status_fg)
-            .bg(status_bg)
+            .bg(badge_bg)
             .add_modifier(Modifier::BOLD),
     );