fix(bearings): expose full truncated board text

[parjmeneses]

Summary

• expose exact full text through native titles for clipping-prone Bearings board content
• retain visible labels, mobile wrapping, keyboard behavior, and Lavish interactions
• add deterministic headless-free renderer regressions covering long and markup-like payloads

Validation

• no-mistakes review completed after accepted tooltip decisions
• targeted Bearings board tests passed, including real-browser visual verification
• pinned ShellCheck 0.11.0 and actionlint 1.7.12 passed through bin/fm-lint.sh

The branch was pushed by no-mistakes through the authenticated fork. This PR is intentionally not merged.

[greptile-apps]

Confidence Score: 4/5

The PR should not merge until the landed PR-link tooltip implementation and its new deterministic assertion agree.

A valid landed item with a PR URL reaches an unchanged renderer branch that never sets title, while the newly added test requires that exact title and therefore fails.

Files Needing Attention: tests/fm-bearings-board.test.sh and .agents/skills/bearings/assets/board-template.html

_{Reviews (1): Last reviewed commit: "no-mistakes(lint): silence SC2016 on jq ..." | Re-trigger Greptile}

[greptile-apps]

Landed PR tooltip assertion fails

When a landed item has a pr_url, the renderer creates .bb-row__pr without assigning its title, so this new assertion cannot find the full URL and the tooltip regression test fails deterministically.