Release Roomote 0.3.1

[mrubens]

Automated Version PR: bumps the product version to 0.3.1 and folds the pending changesets into the root CHANGELOG.md.

• Squash-merge this PR into develop to cut the release.
• The frozen release/v0.3.1 promote PR to main opens automatically after the merge.
• New changesets on develop refresh this PR automatically.

0.3.1 (2026-07-12)

Patch changes

• Route Amazon Bedrock API keys through the Mantle endpoint and clarify Mantle key setup in model settings.
• GitHub app @mention detection requires word boundaries so longer lookalike logins and emails containing the configured slug no longer falsely trigger agent replies.
• Task filter PR-repo labels left-align correctly in the mobile filter sheet instead of sitting awkwardly centered.
• Materialize pasted Google Vertex service-account credentials before OpenCode starts so Vertex models work across worker paths without exposing credential JSON in provider errors.
• Visual-proof auto-post to Slack is actually gated by the SlackProofAutoPost experimental flag; when the flag is off, proof is no longer auto-posted and agents must share uploaded screenshots through explicit chat replies.
• Task history records when a linked pull request is merged or closed as an out-of-band status message agents can resurface (GitHub, GitLab, Gitea, Bitbucket, and Azure DevOps), using provider-native PR references.

[roomote-roomote]

No new code issues found. The latest release commit folds all six pending patch changesets into CHANGELOG.md under 0.3.1 and keeps the version bumped from 0.3.0 to 0.3.1, matching the expected pnpm run version output. Since the last review the 0.3.1 notes gained four more patch entries as their changesets landed on develop; each bullet maps exactly to a removed changeset file. See task

_{Reviewed 2dff1be}