chore: keep coverage output minimal and readable

Author: Nubet

.gitignore

@@ -40,3 +40,4 @@ core
 node_modules
 .expo
 .idea
+coverage/

scripts/coverage-human-report.mjs

@@ -0,0 +1,42 @@
+import { readFileSync } from 'node:fs';
+import path from 'node:path';
+
+const summaryPath = path.resolve(process.cwd(), 'coverage', 'coverage-summary.json');
+
+function formatPercent(value) {
+  return `${Number(value).toFixed(2)}%`;
+}
+
+function printBlock(title, metrics) {
+  console.log(`\n${title}`);
+  console.log(`- Statement coverage: ${formatPercent(metrics.statements.pct)}`);
+  console.log(`- Branch coverage (if/switch): ${formatPercent(metrics.branches.pct)}`);
+  console.log(`- Function coverage: ${formatPercent(metrics.functions.pct)}`);
+  console.log(`- Line coverage: ${formatPercent(metrics.lines.pct)}`);
+}
+
+try {
+  const raw = readFileSync(summaryPath, 'utf-8');
+  const summary = JSON.parse(raw);
+  const total = summary.total;
+
+  console.log('\n=== Coverage Summary ===');
+  printBlock('Whole project', total);
+
+  console.log('\nCore logic details:');
+  Object.entries(summary)
+    .filter(([key]) => key !== 'total')
+    .forEach(([file, metrics]) => {
+      printBlock(file, metrics);
+    });
+
+  console.log('\nVitest table legend:');
+  console.log('- % Stmts = statement coverage');
+  console.log('- % Branch = branch coverage (if/else/switch)');
+  console.log('- % Funcs = function coverage');
+  console.log('- % Lines = line coverage');
+} catch (error) {
+  console.error('Failed to read coverage-summary.json.');
+  console.error(error instanceof Error ? error.message : String(error));
+  process.exit(1);
+}