Prepare v0.4.0-rc.1

[bjcdeshu]

Summary

• set the first v0.4 public candidate to versionName 0.4.0-rc.1 / versionCode 8
• add the dated RC changelog and align roadmap, project status, and security wording with the implemented storage-reliability boundary
• document the exact public Pre-release asset checks and immutable-tag rules

Release boundary

• this is a public Pre-release, not the stable v0.4 release
• v0.3.3 remains the current stable release
• the complete real-device, local, read-only, permission-revocation, and cloud-provider matrix remains pending and blocks stable v0.4
• no signing material or release workflow is changed in this PR

Validation

• exact merged-main baseline: Android CI run 32647249371 — build green; API 36 provider tests 38/38, 0 skipped, 0 failed
• exact PR head: Android CI run 32648116472 — build green; API 36 provider tests 38/38, 0 skipped, 0 failed
• CodeRabbit: success
• git diff --check
• exact version/changelog metadata checks
• java tools/ExportMoraLauncherIcons.java --verify — 25 assets verified

[coderabbitai]

Important

• 🔍 Trigger review

This repository does not receive automatic reviews because it has fewer than 10 stars.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 53b34dde-9b2a-41a8-a448-285b89260bde

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}