fix(root): fix scripts branch naming and build-changed JSON parsing

scripts/build-changed.ts

 import { execSync } from 'node:child_process'
-import { readFileSync } from 'node:fs'
+import { readFileSync, unlinkSync } from 'node:fs'
 import { resolve } from 'node:path'
 
 /**
@@ -16,10 +16,13 @@ function main()
 {
     console.log('Detecting changed packages since last release...\n')
 
+    const tmpFile = resolve(process.cwd(), '.changeset-status-tmp.json')
+
     try
     {
-        // 获取 changeset 状态（JSON 格式）
-        const statusOutput = run('pnpm changeset status --output=json')
+        // 获取 changeset 状态（输出到临时文件）
+        run(`npx changeset status --output=${tmpFile}`)
+        const statusOutput = readFileSync(tmpFile, 'utf-8')
         const status = JSON.parse(statusOutput)
 
         if (!status.releases || status.releases.length === 0)
@@ -57,6 +60,9 @@ function main()
     }
     catch (error: any)
     {
+        // 清理临时文件
+        try { unlinkSync(tmpFile) } catch {}
+
         if (error.message?.includes('No unreleased changesets found'))
         {
             console.log('No unreleased changesets found. Nothing to build.')
@@ -67,6 +73,11 @@ function main()
             process.exit(1)
         }
     }
+    finally
+    {
+        // 清理临时文件
+        try { unlinkSync(tmpFile) } catch {}
+    }
 }
 
 main()