diff --git a/src-tauri/src/achievements.rs b/src-tauri/src/achievements.rs
index 55cd09d..7f54cc1 100644
--- a/src-tauri/src/achievements.rs
+++ b/src-tauri/src/achievements.rs
@@ -114,10 +114,12 @@ impl AchievementProgress {
         }
     }
 
+    #[cfg(test)]
     pub fn take_newly_unlocked(&mut self) -> Vec<AchievementId> {
         std::mem::take(&mut self.newly_unlocked)
     }
 
+    #[cfg(test)]
     pub fn is_unlocked(&self, achievement: &AchievementId) -> bool {
         self.unlocked.contains(achievement)
     }
@@ -647,7 +649,7 @@ pub fn check_achievements(
     }
 
     // Special first-time achievements
-    if stats.tools_usage.len() >= 1 && progress.unlock(AchievementId::FirstTool) {
+    if !stats.tools_usage.is_empty() && progress.unlock(AchievementId::FirstTool) {
         newly_unlocked.push(AchievementId::FirstTool);
     }
     if stats.code_blocks_generated >= 1 && progress.unlock(AchievementId::FirstCodeBlock) {
@@ -697,7 +699,7 @@ pub fn check_achievements(
         let weekday = session_start.weekday();
 
         // Early bird - 5 AM to 7 AM
-        if hour >= 5 && hour <= 7 && progress.unlock(AchievementId::EarlyBird) {
+        if (5..=7).contains(&hour) && progress.unlock(AchievementId::EarlyBird) {
             newly_unlocked.push(AchievementId::EarlyBird);
         }
 
@@ -708,7 +710,7 @@ pub fn check_achievements(
         }
 
         // All nighter - 2 AM to 5 AM
-        if current_hour >= 2 && current_hour <= 5 && progress.unlock(AchievementId::AllNighter) {
+        if (2..=5).contains(&current_hour) && progress.unlock(AchievementId::AllNighter) {
             newly_unlocked.push(AchievementId::AllNighter);
         }
 
diff --git a/src-tauri/src/wsl_bridge.rs b/src-tauri/src/wsl_bridge.rs
index 3983f11..b3744f2 100644
--- a/src-tauri/src/wsl_bridge.rs
+++ b/src-tauri/src/wsl_bridge.rs
@@ -90,6 +90,7 @@ impl WslBridge {
         }
     }
 
+    #[allow(dead_code)]
     pub async fn new_with_loaded_achievements(app: &tauri::AppHandle) -> Self {
         let bridge = Self::new();
 
@@ -354,10 +355,12 @@ impl WslBridge {
         self.stats.read().clone()
     }
 
+    #[allow(dead_code)]
     pub fn update_stats(&mut self, input_tokens: u64, output_tokens: u64, model: &str) {
         self.stats.write().add_usage(input_tokens, output_tokens, model);
     }
 
+    #[allow(dead_code)]
     pub fn reset_session_stats(&mut self) {
         self.stats.write().reset_session();
     }