🐛 Bugfix: Support viewing whether the agent version has been published as an A2A agent

[xuyaqist]

当用户点击编辑，可以看到这个版本是否发布为符合A2A协议的Agent

[Copilot]

Pull request overview

This PR adds an is_a2a flag to agent version metadata so the system can track (and surface in the UI) whether a published version was released as an A2A Server agent.

Changes:

• Add is_a2a column to ag_tenant_agent_version_t (init SQL + incremental migration).
• Persist is_a2a on publish in the backend and expose it via backend models.
• Plumb is_a2a through frontend types and prefill it in the version edit modal.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
k8s/helm/nexent/charts/nexent-common/files/init.sql	Adds is_a2a column + comment to initial schema.
docker/init.sql	Adds is_a2a column + comment to Docker initial schema.
docker/sql/v2.0.2_0425_add_is_a2a_to_ag_tenant_agent_version_t.sql	Adds incremental migration for existing DBs.
backend/database/db_models.py	Adds is_a2a field to SQLAlchemy AgentVersion model.
backend/services/agent_version_service.py	Writes is_a2a when publishing a version.
backend/consts/model.py	Adds is_a2a to version list/detail response models.
frontend/services/agentVersionService.ts	Extends AgentVersion TS type with is_a2a.
frontend/app/[locale]/agents/versions/AgentVersionPubulishModal.tsx	Prefills and displays A2A flag in the publish/edit modal via component state.
frontend/app/[locale]/agents/AgentVersionCard.tsx	Passes is_a2a into modal initial values when editing.

Comments suppressed due to low confidence (1)

frontend/app/[locale]/agents/versions/AgentVersionPubulishModal.tsx:243

• The A2A switch is still interactive in edit mode, but the update flow ignores it (handleUpdate only sends version_name/release_note). This makes the UI misleading because toggling the switch won’t persist. Either disable/read-only the switch when isEdit is true, or extend the update request/API to accept and save this flag (if you intend it to be editable).

          <Form.Item
            label={t("agent.version.publishAsA2AAgent")}
            valuePropName="checked"
          >
            <Switch
              checked={isA2AAgent}
              onChange={(checked) => setIsA2AAgent(checked)}
            />
          </Form.Item>

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✅ All modified and coverable lines are covered by tests.

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