(Type safety) Project.defaultIssueStatus typed as required but undefined at runtime

[dearlordylord]

Project.defaultIssueStatus is declared as Ref<IssueStatus> (required) in plugins/tracker/src/index.ts#L64, but is undefined at runtime on Huly >=0.7.x for projects created without an explicit default status selection (workspace templates, CreateProject UI with no selection stores "").

Evidence

• UI already handles this: StatusEditor.svelte#L107-L117 checks if (defaultIssueStatus !== undefined) and falls back to statuses?.[0].
• CreateProject.svelte#L114 sets defaultIssueStatus: defaultStatus ?? ('' as Ref<IssueStatus>) — empty string when user doesn't pick one.
• REST API consumers (e.g. MCP servers using @hcengineering/api-client) receive undefined for this field, causing silent failures when creating issues with the "project default" status.
• Example of API consumers having to fix this on their side: dearlordylord/huly-mcp@f52cd84

Affected call sites

These access .defaultIssueStatus without guarding for undefined:

• SubIssues.svelte#L51, #L79
• DraftIssueChildEditor.svelte#L72, #L87
• migration.ts#L203
• CreateVacancy.svelte#L188

Proposed fix

Make the field optional in the interface and model class:

// plugins/tracker/src/index.ts
-  defaultIssueStatus: Ref<IssueStatus>
+  defaultIssueStatus?: Ref<IssueStatus>

// models/tracker/src/types.ts
-    defaultIssueStatus!: Ref<IssueStatus>
+    defaultIssueStatus?: Ref<IssueStatus>

fixed by #10598

[huly-github-staging]

Connected to Huly®: UBERF-15803