Prepare the desktop release metadata, concise release notes, and the final terminal help polish for the 0.3.1 release. The release note groups the post-0.3.0 work by user-facing area instead of listing every commit, and the desktop version metadata is aligned for the tag-triggered packaging workflow.
Constraint: GitHub Release body is sourced from release-notes/v0.3.1.md in the tagged commit
Rejected: List every post-0.3.0 commit in the release note | too noisy for this patch release
Confidence: high
Scope-risk: narrow
Tested: cd desktop && bun run test -- src/pages/TerminalSettings.test.tsx --run
Tested: bun run check:desktop
Tested: bun run check:native
Tested: bun run verify (passed=8 failed=0 skipped=2)
Not-tested: Live provider release gate
