[rrbe]

GitHub dropped CSS-module prefixes from its list and Files changed DOM. Commit diff badges were appended directly to grid rows before their titles, PR-list height reservation stopped matching, and file/folder folding controls were no longer injected.

Use a shared selector for the current main-content wrapper, distinguished from the status icon's separate wrapper, to keep commit stats and PR branch/diff/review badges below metadata. Apply the same structure to loading-space reservation and retain compact-row behavior.

Update Files changed sidebar, header, and toolbar selectors. Expanding all folders now proceeds one depth per animation frame because React unmounts descendants when their parent closes; collapsing still runs deepest first.

Validation:

• pnpm test: 306 tests passed; pnpm typecheck, pnpm build, and git diff --check passed.
• Run the PR dashboard integration suite against both prefixed and current DOM, covering branch/diff/review ordering, label filtering, compact density, hydration, row replacement, and lazy conflict indicators.
• Add regressions for commit placement and placeholders, status-icon exclusion, file/folder control placement and deduplication, and descendants mounted after parent expansion. The descendant regression fails with the previous expansion logic and passes with this fix.
• Live browser checks confirmed 35 commit badges below metadata and inspected branch/diff/review badges on all 14 repository PR rows. Temporarily applied the updated folding module and verified all four files could be collapsed and expanded. Reproduced the nested-folder expansion issue in the live React tree; the mounted-descendant regression covers its fix.

Also inspected PR number-copy, label filtering, review/conflict, and Approve now DOM hooks; no additional selector failure was found in those paths. The installed extension was not replaced during the browser checks.