[Bug]: `.claude-plugin` / `.codex-plugin` manifest version has been `0.3.0` since v0.3.1, so plugin updates are not working

Describe the bug

The two client manifests never got bumped after v0.3.1, while marketplace.json tracked every release:

tag	.claude-plugin/plugin.json	.codex-plugin/plugin.json	marketplace.json
v0.3.1	0.3.0	0.3.0	0.3.1
v0.4.0	0.3.0	0.3.0	0.4.0
v0.5.0	0.3.0	0.3.0	0.5.0
v0.6.0	0.3.0	0.3.0	0.6.0

At v0.6.0 the new agent-plugin/plugin.json correctly says 0.6.0, so it is only the two client manifests.

On Claude Code this means:

• the payload installs to ~/.claude/plugins/cache/win-dev-skills/winui/**0.3.0** no matter which release it is;
• claude plugin update winui@win-dev-skills compares manifest versions, decides it is already current, and never re-extracts;
• claude plugin list reports Version: 0.3.0 for a 0.6.0 payload.

The practical effect is that no label anywhere tells you which payload is actually installed, and updating requires uninstall + install instead of update.

Suggested fix: bump the two client manifests as part of the release, and add a consistency check across all four manifests.

Affected skill / tool

area: plugin / install

To Reproduce

claude plugin marketplace add microsoft/win-dev-skills
claude plugin install winui@win-dev-skills
claude plugin list

Expected behavior

The two client manifests carry the version of the release they ship in

Session report (strongly recommended)

Build / runtime output

Copilot CLI version

No response

Plugin version

No response

OS version

No response

.NET SDK version

No response

Additional context

No response

Inspect .claude-plugin/plugin.json, .codex-plugin/plugin.json, agent-plugin/plugin.json, and marketplace.json, comparing how release versions are represented. Update the two client manifests with the shipped release version, add a consistency check across all four manifests, and verify the result with the provided Claude plugin install and list commands.