refactor: address clippy warnings and remove dead code

- Replace map_or with is_none_or for cleaner Option handling
- Remove unused detect_six_hour_reset method
- Simplify format! to to_string where appropriate
- Convert single-match to if statement
- Remove unused system_events module

Author: Xevion

src-tauri/src/adaptive_poller.rs

@@ -181,7 +181,7 @@ impl TimeWindowedTracker {
         samples.windows(2).fold(0u8, |total, w| {
             if w[1] > w[0] {
                 let change = w[1] - w[0];
-                if max_change.map_or(true, |max| change <= max) {
+                if max_change.is_none_or(|max| change <= max) {
                     total.saturating_add(change)
                 } else {
                     total
@@ -200,23 +200,6 @@ impl TimeWindowedTracker {
         self.calculate_momentum(window, now, |m| m.weekly_pct(), None)
     }
 
-    fn detect_six_hour_reset(&self) -> bool {
-        if self.history.len() < 2 {
-            return false;
-        }
-
-        let last_two: Vec<_> = self.history.values().rev().take(2).collect();
-        if last_two.len() < 2 {
-            return false;
-        }
-
-        let latest = last_two[0].six_hour_pct();
-        let previous = last_two[1].six_hour_pct();
-
-        // Reset detected: significant drop (>20%)
-        previous > latest && (previous - latest) > 20
-    }
-
     fn time_since_any_change(&self, now: Instant) -> Duration {
         if self.history.len() < 2 {
             return Duration::MAX;

src-tauri/src/lib.rs

@@ -1,5 +1,4 @@
 mod adaptive_poller;
-mod system_events;
 
 use adaptive_poller::{AdaptivePoller, PollerConfig, UsageMetrics};
 use serde::{Deserialize, Serialize};
@@ -382,7 +381,7 @@ fn update_tray_icon(
                         // Parse ISO 8601 timestamp and format it nicely
                         s.split('T')
                             .next()
-                            .map(|date| format!("{}", date))
+                            .map(|date| date.to_string())
                             .unwrap_or_else(|| s.clone())
                     })
                     .unwrap_or_else(|| "Unknown".to_string())
@@ -537,11 +536,8 @@ pub fn run() {
             TrayIconBuilder::with_id("main")
                 .icon(icon)
                 .menu(&menu)
-                .on_menu_event(|app, event| match event.id.as_ref() {
-                    "quit" => {
-                        app.exit(0);
-                    }
-                    _ => {}
+                .on_menu_event(|app, event| if event.id.as_ref() == "quit" {
+                    app.exit(0);
                 })
                 .build(app)?;