fix: Address Copilot suggestions - tolerance bug and pluralization

- Disable tolerance for small exact values (1-2 tracks) to prevent accepting 0 when expecting 1
- Fix pluralization in searchalbum: '1 track' instead of '1 tracks'

Author: htilly

lib/command-handlers.js

@@ -645,7 +645,9 @@ async function searchalbum(input, channel) {
 
     let message = `Found ${sortedAlbums.length} albums:\n`;
     sortedAlbums.forEach((albumResult) => {
-      const trackInfo = albumResult.totalTracks ? ` (${albumResult.totalTracks} tracks)` : '';
+      const trackInfo = albumResult.totalTracks
+        ? ` (${albumResult.totalTracks} ${albumResult.totalTracks === 1 ? 'track' : 'tracks'})`
+        : '';
       message += `> *${albumResult.name}* by _${albumResult.artist}_${trackInfo}\n`;
     });
     sendMessage(message, channel);

test/tools/integration-test-suite.mjs

@@ -596,14 +596,17 @@ const validators = {
         // Exact match - no output
         if (actualIncrease === exactIncrease) return true;
 
-        // Within tolerance (90-100%) - warning but pass
-        const tolerance = Math.floor(exactIncrease * 0.9);
-        if (actualIncrease >= tolerance && actualIncrease < exactIncrease) {
-            console.log(`   ⚠️  WARNING: Queue increased by ${actualIncrease} (expected ${exactIncrease}, baseline: ${baseline} → ${size})`);
-            return true;
+        // Disable tolerance for very small expected increases (1-2 tracks),
+        // where a "90%" tolerance would allow clearly incorrect results (e.g., 0 of 1).
+        if (exactIncrease >= 3) {
+            const tolerance = Math.floor(exactIncrease * 0.9);
+            if (actualIncrease >= tolerance && actualIncrease < exactIncrease) {
+                console.log(`   ⚠️  WARNING: Queue increased by ${actualIncrease} (expected ${exactIncrease}, baseline: ${baseline} → ${size})`);
+                return true;
+            }
         }
 
-        // Outside tolerance - fail
+        // Outside tolerance or small exact value - fail
         return `❌ FAIL: Queue increased by ${actualIncrease} (expected exactly ${exactIncrease}, baseline: ${baseline} → ${size})`;
     },