v0.4.0

## What's Changed
* feat(kb): 中文感知 BM25 检索 + 可选 cross-encoder 重排序 by @SummerCaptain in https://github.com/Netw0rkNoob/VulnClaw/pull/252
* fix(i18n): add missing cli.host_no_set English translation by @Shxiao101 in https://github.com/Netw0rkNoob/VulnClaw/pull/257
* docs: remove README references to nonexistent docs/keyless-auth.md by @Shxiao101 in https://github.com/Netw0rkNoob/VulnClaw/pull/259
* fix(cli): paste and scroll classic /config panel by @JMAN730 in https://github.com/Netw0rkNoob/VulnClaw/pull/264
* feat(cli): expose experience loop as REPL slash commands by @JMAN730 in https://github.com/Netw0rkNoob/VulnClaw/pull/265
* feat(web): add HTTPS VPS compose profile by @JMAN730 in https://github.com/Netw0rkNoob/VulnClaw/pull/266
* feat(tui): configurable container layout with findings evidence and sub-agent transcripts by @FarStar-CN in https://github.com/Netw0rkNoob/VulnClaw/pull/268
* Unclecheng li patch 1 by @Unclecheng-li in https://github.com/Netw0rkNoob/VulnClaw/pull/270
* Unclecheng li patch 2 by @Unclecheng-li in https://github.com/Netw0rkNoob/VulnClaw/pull/271
* fix(solver): break the tool-less spin loop; doctor gains --probe-llm by @Unclecheng-li in https://github.com/Netw0rkNoob/VulnClaw/pull/273
* feat(mcp): add ScanMalware as a builtin remote MCP server by @jonaslejon in https://github.com/Netw0rkNoob/VulnClaw/pull/274
* fix(cli): read the Windows clipboard over stdout; drop a dead README link by @Unclecheng-li in https://github.com/Netw0rkNoob/VulnClaw/pull/276
* fix(cli): register /mode in the classic REPL; document safety.* config by @Unclecheng-li in https://github.com/Netw0rkNoob/VulnClaw/pull/278
* chore(release): bump version to 0.4.0 by @Unclecheng-li in https://github.com/Netw0rkNoob/VulnClaw/pull/280

## New Contributors
* @SummerCaptain made their first contribution in https://github.com/Netw0rkNoob/VulnClaw/pull/252
* @Shxiao101 made their first contribution in https://github.com/Netw0rkNoob/VulnClaw/pull/257
* @jonaslejon made their first contribution in https://github.com/Netw0rkNoob/VulnClaw/pull/274

**Full Changelog**: https://github.com/Netw0rkNoob/VulnClaw/compare/v0.3.9...v0.4.0