Cf Temp Mail Version Upgrade

Version Upgrade

Upgrade the version number of the cloudflare_temp_email project.

Files to modify

1. frontend/package.json — version field
2. worker/package.json — version field
3. worker/src/constants.ts — VERSION constant (format: VERSION: 'v' + '1.4.0')
4. pages/package.json — version field
5. vitepress-docs/package.json — version field
6. CHANGELOG.md — add new version placeholder
7. CHANGELOG_EN.md — add new version placeholder (English)

Upgrade workflow

1. Read frontend/package.json to get the current version.
2. Compute the new version based on the upgrade type:
   • major: 1.3.0 → 2.0.0
   • minor: 1.3.0 → 1.4.0
   • patch: 1.3.0 → 1.3.1
3. Update the version field in every package.json listed above.
4. Update the VERSION constant in worker/src/constants.ts.
5. Insert a new version placeholder at the top of CHANGELOG.md.
6. Insert a new version placeholder at the top of CHANGELOG_EN.md.
7. Rename the previous version heading in both changelogs from ## v{OLD_VERSION}(main) to ## v{OLD_VERSION} so only the new active development version keeps (main).

CHANGELOG format

In CHANGELOG.md, insert before the existing ## v{OLD_VERSION}(main) line (i.e. right after the closing </p> of the language-switch link):

## v{VERSION}(main)

### Features

### Bug Fixes

### Improvements

After inserting the new placeholder, update the old heading:

-## v{OLD_VERSION}(main)
+## v{OLD_VERSION}

CHANGELOG_EN.md uses the same format and must receive the same old-heading update.

Commit message format

feat: upgrade version to v{VERSION}

- Update version number to {VERSION} in all package.json files
- Add v{VERSION} placeholder in CHANGELOG.md
- Move (main) marker from v{OLD_VERSION} to v{VERSION}