chore(a11y): preserve conflicting generated accessibility lineage

[seonghobae]

Lifecycle repair

This generated direct-develop PR is preserved as provenance but is no longer an active Naruon source writer.

• protected base: develop@042b0c70531b229af3acbd0421a2f23098d848b3
• generated head: 4537f187862f1cf24a4189d50469fc1a47bf449b
• current exact head: fffb4c0d6d7a59cacfee031a9f9e48f76e312ee8
• lifecycle: open / Draft / mergeable / zero effective delta
• current head is an ordinary non-force child of the generated commit and adopts the exact protected develop tree 8fde14381aaa430eeaaf61151dab6f6800127cd3; GitHub reports an empty PR diff.

Why the generated branch is not product authority

The generated branch mixed an accessibility proposal with unrelated LLM/provider configuration and test changes across 11 files. In particular, it changed gpt-5.4 to gpt-4o in backend provider tests, Settings runtime defaults/tests, full-product smoke fixtures, and E2E helpers. A UI accessibility PR does not own model/provider routing or defaults, and Naruon must consume the released contextual-orchestrator contract rather than create a provider/model migration as a side effect of button work.

The accessibility delta also overlaps existing canonical Naruon lanes:

• fix(network-graph): preserve keyboard tooltip access #1561 owns the unavailable NetworkGraph relationship-action contract, including focusable aria-disabled, descriptive tooltip/IDREF behavior, sequential keyboard reachability, Escape dismissal, and guarded activation.
• fix(a11y): announce empty mail and search states without wrapping actions #1576 owns the current SearchLayout accessibility/live-region and request-ordering contract.
• perf(search): memoize active-result lookup #1504 → perf(search): replace repeated result scans with indexed lookups #1477 own the separate SearchLayout lookup-performance stack.

Native disabled versus focusable aria-disabled is an action-specific interaction decision, not a blanket migration rule. The generated branch did not establish a unique bounded contract strong enough to become another writer for those surfaces.

No generated source/test/CHANGELOG/model-config delta is current product authority. The historical commits remain in ancestry; no force-push, destructive rebase, self-approval, dummy requeue, or gate weakening was used.

Succession boundary

Do not close this PR merely to reduce the queue. Keep it open Draft until the canonical owner lanes are protected-integrated and a fresh equivalence/succession audit proves every valid accessibility source, test, fixture, interaction, and evidence contribution from the generated commits is either completely inherited or deliberately rejected with recorded rationale. Only verified complete succession may justify closure.

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