A real accessibility hole, not a cosmetic one: for the whole loading window the page exposed nothing but the sidebar, which is exactly the "API Keys link does nothing" report. Reusing the `role="status" aria-live="polite"` container the other dashboard loading states already use keeps it consistent.
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Validated in one consolidated worktree cut from `release/v3.8.51`, boarded with the rest of this batch — zero conflicts between the 19 PRs.
- `typecheck:core` clean; `check:dashboard-typecheck` OK (206 pre-existing, all within the frozen baseline); `check:changelog-integrity` OK
- complexity 2802 / baseline 3218 and cognitive-complexity 1267 / baseline 1437 — both under baseline
- 226 of 228 focused assertions green across the batch's 23 test files. The 2 remaining belong to #12551, which is held separately.
Two batch-owned defects were found and fixed in flight, both pure base drift: `173_xp_action_counts.sql` collided with `173_call_logs_video_content_removed.sql` (renumbered to 176 on #12651 — it aborted every DB open, which is what 53 of the first run's failures were), and the feature-flag catalog was missing the `SERVER_OWNED_TOOL_LOOP_ENABLED` row the base gained after #12552 was written.
⚠️ base-red inherited: #12732 — `Docs Gates`, `Merge integrity`, `No new ESLint warnings`, `Unit Tests fast-path` and `Fast Quality Gates` reproduce on the pure tip (provider count 356 vs the 358 the modules define, SKILL.md drift, and `open-sse/utils/stream.ts` at 3115 > frozen 3098, which this batch does not touch).
Thanks @pacocartones — the `file:line` citations and the explicit out-of-scope notes on every one of these made a 19-PR batch reviewable in one pass.
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