feat: add initial module analysis dump for large compilations

apps/app/src/utils/next.config.utils.js

@@ -80,6 +80,57 @@ exports.createChunkModuleStatsPlugin = () => ({
       console.log(
         `[ChunkModuleStats] initial: ${initialModuleIds.size}, async-only: ${asyncOnlyCount}, total: ${compilation.modules.size}`,
       );
+
+      // Dump initial module details to file for analysis (only for large compilations)
+      if (
+        initialModuleIds.size > 500 &&
+        process.env.DUMP_INITIAL_MODULES === '1'
+      ) {
+        const packageCounts = {};
+        const appModules = [];
+        for (const id of initialModuleIds) {
+          const nmIdx = id.lastIndexOf('node_modules/');
+          if (nmIdx !== -1) {
+            const rest = id.slice(nmIdx + 'node_modules/'.length);
+            const pkg = rest.startsWith('@')
+              ? rest.split('/').slice(0, 2).join('/')
+              : rest.split('/')[0];
+            packageCounts[pkg] = (packageCounts[pkg] || 0) + 1;
+          } else {
+            appModules.push(id);
+          }
+        }
+        const sorted = Object.entries(packageCounts).sort(
+          (a, b) => b[1] - a[1],
+        );
+        const lines = ['# Initial Chunk Module Analysis', ''];
+        lines.push(`Total initial modules: ${initialModuleIds.size}`);
+        lines.push(`App modules (non-node_modules): ${appModules.length}`);
+        lines.push(`node_modules packages: ${sorted.length}`);
+        lines.push('');
+        lines.push('## Top Packages by Module Count');
+        lines.push('| # | Package | Modules |');
+        lines.push('|---|---------|---------|');
+        for (let i = 0; i < sorted.length; i++) {
+          const [pkg, count] = sorted[i];
+          lines.push(`| ${i + 1} | ${pkg} | ${count} |`);
+        }
+        lines.push('');
+        lines.push('## App Modules (first 200)');
+        for (const m of appModules.slice(0, 200)) {
+          lines.push(`- ${m}`);
+        }
+        const outPath = path.resolve(
+          compiler.outputPath,
+          '..',
+          'initial-modules-analysis.md',
+        );
+        fs.writeFileSync(outPath, lines.join('\n'));
+        // biome-ignore lint/suspicious/noConsole: Dev-only module stats dump path
+        console.log(
+          `[ChunkModuleStats] Dumped initial module analysis to ${outPath}`,
+        );
+      }
     });
   },
 });