Release AI-Light 0.5.5

[LeonDevLifeLog]

Summary

• bump the desktop application version to 0.5.5
• publish from a tag whose commit includes the draft metadata fix

Validation

• pnpm test
• pnpm check
• pnpm typecheck
• pnpm build
• cargo test --manifest-path crates/ailight-core/Cargo.toml
• cargo check --locked --manifest-path src-tauri/Cargo.toml
• actionlint .github/workflows/ci.yml .github/workflows/release.yml
• git diff --check
• all three version declarations aligned at 0.5.5