⬆️ Upgrade to Next.js 16 with ESM module system

Convert package to native ESM with modern TypeScript configuration:
- Add "type": "module" and update exports to use "import" field
- Change tsconfig to use ESNext module with Bundler resolution
- Update test-app to Next.js 16.0.7 with matching config changes

Fix client-side bundling issue in env-script component:
- Dynamic import next/headers to avoid including server-only code

Simplify release workflow:
- Switch from semantic-release to tag-triggered releases
- Remove back-merge job and reduce permissions
- Use softprops/action-gh-release for GitHub releases

Author: hyperb1iss

.github/workflows/release.yml

@@ -2,13 +2,12 @@ name: Release
 
 on:
   push:
-    branches: [main]
+    tags:
+      - 'v*'
   workflow_dispatch:
 
 permissions:
   contents: write
-  issues: write
-  pull-requests: write
   id-token: write
 
 concurrency:
@@ -24,18 +23,12 @@ jobs:
     name: Release
     runs-on: ubuntu-latest
     timeout-minutes: 15
-    outputs:
-      released: ${{ steps.semantic.outputs.new_release_published }}
-      version: ${{ steps.semantic.outputs.new_release_version }}
-      channel: ${{ steps.semantic.outputs.new_release_channel }}
-      tag: ${{ steps.semantic.outputs.new_release_git_tag }}
 
     steps:
       - name: Checkout
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-          persist-credentials: false
 
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
@@ -55,65 +48,23 @@ jobs:
       - name: Build
         run: pnpm build
 
-      - name: Semantic Release
-        id: semantic
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
-          GIT_AUTHOR_NAME: 'github-actions[bot]'
-          GIT_AUTHOR_EMAIL: 'github-actions[bot]@users.noreply.github.com'
-          GIT_COMMITTER_NAME: 'github-actions[bot]'
-          GIT_COMMITTER_EMAIL: 'github-actions[bot]@users.noreply.github.com'
-        run: pnpm semantic-release
-
-      - name: Summary
-        if: always()
-        run: |
-          if [ "${{ steps.semantic.outputs.new_release_published }}" == "true" ]; then
-            echo "## Release Published" >> $GITHUB_STEP_SUMMARY
-            echo "" >> $GITHUB_STEP_SUMMARY
-            echo "**Version:** \`${{ steps.semantic.outputs.new_release_version }}\`" >> $GITHUB_STEP_SUMMARY
-            echo "**Tag:** \`${{ steps.semantic.outputs.new_release_git_tag }}\`" >> $GITHUB_STEP_SUMMARY
-            echo "" >> $GITHUB_STEP_SUMMARY
-            echo "[npm](https://www.npmjs.com/package/next-dynenv/v/${{ steps.semantic.outputs.new_release_version }}) · [Release Notes](https://github.com/${{ github.repository }}/releases/tag/${{ steps.semantic.outputs.new_release_git_tag }})" >> $GITHUB_STEP_SUMMARY
-          else
-            echo "## No Release" >> $GITHUB_STEP_SUMMARY
-            echo "" >> $GITHUB_STEP_SUMMARY
-            echo "No releasable changes detected." >> $GITHUB_STEP_SUMMARY
-          fi
+      - name: Run tests
+        run: pnpm test
 
-  back-merge:
-    name: Back-merge
-    runs-on: ubuntu-latest
-    needs: release
-    if: needs.release.outputs.released == 'true'
-    timeout-minutes: 5
+      - name: Publish to npm
+        run: pnpm publish --access public --no-git-checks
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
 
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
         with:
-          fetch-depth: 0
-          token: ${{ secrets.GITHUB_TOKEN }}
+          generate_release_notes: true
 
-      - name: Configure Git
-        run: |
-          git config user.name "github-actions[bot]"
-          git config user.email "github-actions[bot]@users.noreply.github.com"
-
-      - name: Merge to development
+      - name: Summary
         run: |
-          git fetch origin main development
-          git checkout development
-          git pull origin development
-
-          if git merge origin/main --no-ff -m "chore: back-merge main into development [skip ci]"; then
-            git push origin development
-            echo "## Back-merge Complete" >> $GITHUB_STEP_SUMMARY
-            echo "Successfully merged main → development" >> $GITHUB_STEP_SUMMARY
-          else
-            echo "## Back-merge Failed" >> $GITHUB_STEP_SUMMARY
-            echo "Merge conflict detected. Manual merge required." >> $GITHUB_STEP_SUMMARY
-            git merge --abort
-            exit 1
-          fi
+          echo "## Release Published" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "**Tag:** \`${{ github.ref_name }}\`" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "[npm](https://www.npmjs.com/package/next-dynenv) · [Release](https://github.com/${{ github.repository }}/releases/tag/${{ github.ref_name }})" >> $GITHUB_STEP_SUMMARY

package.json

@@ -2,12 +2,13 @@
     "name": "next-dynenv",
     "version": "4.0.0",
     "description": "Dynamic runtime environment variables for Next.js - populate your environment at runtime, not build time.",
+    "type": "module",
     "main": "build/index.js",
     "types": "build/index.d.ts",
     "exports": {
         ".": {
             "types": "./build/index.d.ts",
-            "default": "./build/index.js"
+            "import": "./build/index.js"
         }
     },
     "engines": {
@@ -51,7 +52,7 @@
     },
     "homepage": "https://github.com/hyperb1iss/next-dynenv#readme",
     "dependencies": {
-        "next": "^15",
+        "next": "^16.0.7",
         "react": "^19"
     },
     "devDependencies": {