Adds a deduplicated authored-pull source and My PRs mobile queue, truthful per-source failure metadata, pagination, existing pull-workspace routing, and a gated 320/390px browser journey.
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Closes #1346
Adds a deduplicated authored-pull source and My PRs mobile queue, truthful per-source failure metadata, pagination, existing pull-workspace routing, and a gated 320/390px browser journey.
Verified locally: 2542 passed, 16 skipped; authored mobile E2E 3 passed; deterministic release bundle verified.