The write path handled only the est/* and p/* label axes. Extend it to the two
mutations dogfooding proved were missing — assignee and milestone — behind one
unified change model:
- IssueChange gains `assign` and `remilestone` kinds. `planIssueChange` is now
typed to LabelChange (the label kinds only); `isLabelChange` narrows, and a new
pure `summarizeChange(change, currentLabels?)` gives one confirm line for ANY
kind (label kinds delegate to describeChange; field writes describe directly).
- GiteaClient gains `setIssueAssignees` / `setIssueMilestone` (PATCH /issues/{n},
returning the updated issue; milestone 0 clears).
- The main `gitea:applyChange` handler branches: label swaps resolve ids +
setIssueLabels as before; field writes call the new client methods. Snapshot
invalidated either way so board + forecast catch up. ApplyChangeResult.plan is
now optional (absent for field writes).
- issue-screen uses summarizeChange for its diff preview.
Tests: +5 covering isLabelChange, and summarizeChange for assign/unassign,
milestone set-by-title / by-id / removal, and label delegation. Full core suite
132 green; core + desktop typecheck clean.
Follow-up (rest of #24): surface assignee/milestone pickers in the Adjust dialog
and extend the agent's propose_change tool so Reginald can propose them too.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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