refactor(migration): improve framework shim detection logic for better accuracy

Author: naokihaba

packages/cli/src/migration/bin.ts

@@ -530,8 +530,11 @@ async function collectMigrationPlan(
   const frameworkShimFrameworks: Framework[] = [];
   for (const framework of allDetectedFrameworks) {
     const anyMissingShim =
-      !hasFrameworkShim(rootDir, framework) ||
-      (packages ?? []).some((pkg) => !hasFrameworkShim(path.join(rootDir, pkg.path), framework));
+      (detectFramework(rootDir).includes(framework) && !hasFrameworkShim(rootDir, framework)) ||
+      (packages ?? []).some((pkg) => {
+        const pkgPath = path.join(rootDir, pkg.path);
+        return detectFramework(pkgPath).includes(framework) && !hasFrameworkShim(pkgPath, framework);
+      });
     if (anyMissingShim) {
       const addShim = await confirmFrameworkShim(framework, options.interactive);
       if (addShim) {

packages/cli/src/migration/migrator.ts

@@ -732,16 +732,32 @@ function getEnvDtsPath(projectPath: string): string {
 }
 
 export function hasFrameworkShim(projectPath: string, framework: Framework): boolean {
-  const envDtsPath = getEnvDtsPath(projectPath);
-  if (!fs.existsSync(envDtsPath)) {
-    return false;
-  }
-
-  const content = fs.readFileSync(envDtsPath, 'utf-8');
-  if (framework === 'astro') {
-    return content.includes('astro/client');
+  const dirsToScan = [projectPath, path.join(projectPath, 'src')];
+  for (const dir of dirsToScan) {
+    if (!fs.existsSync(dir)) {
+      continue;
+    }
+    let entries: string[];
+    try {
+      entries = fs.readdirSync(dir);
+    } catch {
+      continue;
+    }
+    for (const entry of entries) {
+      if (!entry.endsWith('.d.ts')) {
+        continue;
+      }
+      const content = fs.readFileSync(path.join(dir, entry), 'utf-8');
+      if (framework === 'astro') {
+        if (content.includes('astro/client')) {
+          return true;
+        }
+      } else if (content.includes(`'*.${framework}'`) || content.includes(`"*.${framework}"`)) {
+        return true;
+      }
+    }
   }
-  return content.includes(`'*.${framework}'`) || content.includes(`"*.${framework}"`);
+  return false;
 }
 
 export function addFrameworkShim(