docs(changelog): sync full changelog from tego-standard

[baizixv]

Automatically sync full changelog files from tego-standard repository to ensure consistency. This PR overwrites the changelog files in docs repository with the complete changelog from tego-standard repository.

Summary by CodeRabbit

Documentation

• Updated changelog for version 1.6.8-alpha.1 prerelease, documenting authentication improvements for auth-main-app.
• Updated changelog references in both English and Chinese language versions.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 1c631839-16e4-47fe-8655-16352d1b01b4

📥 Commits

Reviewing files that changed from the base of the PR and between 0a7fc90 and 5942ad6.

📒 Files selected for processing (2)

• docs/en/changelog/changelog.md
• docs/zh/changelog/changelog.md

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📝 Walkthrough

Walkthrough

Two changelog files (English and Chinese) have been updated to introduce a new release entry for version 1.6.8-alpha.1 dated 2026-03-17. A previously unreleased auth-main-app fix has been moved into the new release section, and the compare link has been updated to reflect the new prerelease baseline.

Changes

Cohort / File(s)	Summary
Changelog Updates docs/en/changelog/changelog.md, docs/zh/changelog/changelog.md	Added new 1.6.8-alpha.1 release entry with auth-main-app fix; moved item from Unreleased section; updated compare link from v1.6.7...HEAD to v1.6.8-alpha.1...HEAD.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• docs(changelog): sync full changelog from tego-standard #204: Modifies the same changelog files to update release and Unreleased entries.

Poem

🐰 A changelog hopped through the logs so neat,
Adding alpha releases, oh what a treat!
From unreleased whispers to tagged and true,
Version 1.6.8-alpha blazes on through!

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/sync-full-changelog-20260317-130356

📝 Coding Plan

• Generate coding plan for human review comments

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