test: Add detailed METAR decode statistics to test function

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

metar.html

@@ -536,18 +536,43 @@
         function testAllMetars() {
             console.log(`--- Starting test of ${metars.length} METARs ---`);
             let failed = 0;
+            let withUnknowns = 0;
+            const originalConsoleLog = console.log;
+
             metars.forEach(metarString => {
+                const tempLogs = [];
+                console.log = (...args) => {
+                    tempLogs.push(args.join(' '));
+                };
+
                 try {
                     const sections = generateMetarSections(metarString);
                     if (sections.length === 0 && metarString.length > 0) {
                         throw new Error("Parser produced no sections");
                     }
+                    
+                    const hasUnknowns = tempLogs.some(msg => msg.includes('Unknown') || msg.includes('Other remark'));
+                    if (hasUnknowns) {
+                        withUnknowns++;
+                        originalConsoleLog(`METAR with decoding issues: ${metarString}`);
+                        tempLogs.forEach(msg => originalConsoleLog(`  -> ${msg}`));
+                    }
+
                 } catch (e) {
                     console.error("Failed to parse:", metarString, e);
                     failed++;
                 }
             });
-            console.log(`--- Test finished, ${failed} failures ---`);
+
+            console.log = originalConsoleLog;
+            const total = metars.length;
+            const clean = total - failed - withUnknowns;
+
+            console.log(`--- Test finished ---`);
+            console.log(`Total METARs: ${total}`);
+            console.log(`Clean decodes: ${clean} (${(clean/total*100).toFixed(1)}%)`);
+            console.log(`Decodes with issues: ${withUnknowns} (${(withUnknowns/total*100).toFixed(1)}%)`);
+            console.log(`Failed to parse: ${failed} (${(failed/total*100).toFixed(1)}%)`);
         }
 
         testAllBtn.addEventListener('click', testAllMetars);