chore: bump version to 0.4.3

[Shadow-Azure]

Problem

Since v0.4.2, main landed a headless terminal_ready timeout fix (#55) and a docs update (#49), but no release ships them — users hitting the 60s cli-box start hang in headless/dev mode have no tagged release to consume.

Solution

Bump version 0.4.2 → 0.4.3 (patch) to cut a release containing:

• ec51f7d fix: resolve 60s terminal_ready timeout on 'cli-box start' (headless + dev-mode) (fix: resolve 60s terminal_ready timeout on 'cli-box start' (headless + dev-mode) #55)
• 74aaff8 docs: introduce OpenClaw + Claude Code practice via cli-box (docs: introduce OpenClaw + Claude Code practice via cli-box #49)

Version strings updated in Cargo.toml (workspace), electron-app/package.json, and release.sh; Cargo.lock resynced. Verified with cargo build --release. No code changes.

Test Plan

• cargo build --release -p cli-box-cli -p cli-box-daemon — all three crates compile at v0.4.3
• Cargo.lock resynced (3 crates → 0.4.3)
• sh release.sh — full release artifact build (post-merge)
• Release test per tests/release_test.md (CLI-driven, post-merge)

npm platform packages (packages/*) stay at 0.2.8 — not published in this release.

🤖 Generated with Claude Code

[github-actions]

🔒 门禁检查结果

检查项	状态
Rust 格式化	✅ success
Rust Clippy	✅ success
Rust 测试 & 覆盖率	✅ success
前端测试 & 覆盖率	✅ success
Playwright E2E	✅ success
统一测试 (test.sh)	✅ success
安全检查	✅ success
发布模拟验证	✅ success
升级流程测试	✅ success
cli-box-skill 单元测试	✅ success

Rust 测试覆盖率

指标	覆盖率
行覆盖率	67.3%
分支覆盖率	0.0%

模块	行覆盖率
crates.cli-box-core.src.automation	███████████░░░░░░░░░ 58.3%
crates.cli-box-core.src.daemon	██████████░░░░░░░░░░ 52.6%
crates.cli-box-core.src.sandbox	███████████████████░ 98.8%
crates.cli-box-core.src.server	█████████████████░░░ 87.7%
crates.cli-box-core.src.instance	███████████████████░ 99.1%
crates.cli-box-core.src.process	███████████░░░░░░░░░ 57.7%
crates.cli-box-core.src	███████████░░░░░░░░░ 55.3%
crates.cli-box-core.src.capture	████████████████░░░░ 84.2%

详细报告见 Rust 覆盖率 artifact

前端测试覆盖率

指标	覆盖率
行覆盖率	████████████████░░░░ 78.0%
分支覆盖率	70.4%
函数覆盖率	74.2%
语句覆盖率	77.5%

文件	行覆盖率
src/tests/mocks/websocket.ts	██████████████████░░ 88.0%
src/tests/mocks/xterm.ts	████████████████████ 100.0%
src/main/daemon-bridge.ts	████████░░░░░░░░░░░░ 40.0%
src/renderer/api.ts	██████████████░░░░░░ 68.2%
src/renderer/screenshotSync.ts	████████████████████ 100.0%
src/renderer/scrollback.ts	██████████████████░░ 88.9%
src/renderer/tabState.ts	████████████████████ 100.0%
src/renderer/terminalBuffer.ts	████████████████████ 100.0%

详细报告见前端覆盖率 artifact

✅ 所有检查通过，可以合入

点击 Squash and merge 合并此PR